Laboratory Animal Technican Exam (Lat)

Fisher F344 is an inbred rat strain because it is a specific line of rats that have been bred for many generations to have a uniform genetic makeup. This means that all individuals within the Fisher F344 strain are genetically identical, making them useful for scientific research as they can be used to study the effects of specific genes or genetic variations on various traits and diseases. Norway rat, Rodent, and Rattus are not inbred rat strains as they refer to different species or broader categories that include multiple genetic variations.

Loss of consciousness is the correct answer because when a person loses consciousness, they are no longer aware of their surroundings or experiencing any pain or distress. Loss of consciousness precedes the loss of motor activity, which means that before the person's muscles stop moving, they first lose consciousness, ensuring that the process of dying is painless and distress-free.

The answer "Training; expertise" is correct because consulting with a veterinarian who has the appropriate training and expertise is crucial to ensure proper euthanasia procedures are followed. Euthanasia is a sensitive and delicate procedure that requires specific knowledge and skills to be carried out safely and compassionately. Therefore, it is important to seek guidance from a veterinarian who has received proper training and has the necessary expertise in euthanasia procedures for the specific species involved.

Research institutions provide The Public Health Service with a signed agreement that outlines the institution complies with all aspects of human animal care as described in the PHS Policy. This agreement is called the Animal Welfare Assurance.

When giving an intramuscular injection in the hind limb, care must be taken to avoid the femoral vein, femoral artery, and femoral nerve. These structures are all located in the hind limb and can be damaged if not avoided during the injection. Damage to the femoral vein can lead to bleeding, damage to the femoral artery can result in significant bleeding, and damage to the femoral nerve can cause pain and loss of function in the limb. Therefore, it is important to be cautious and avoid all of these structures when administering an intramuscular injection in the hind limb.

The strain symbol in the mouse model BALB/c StCrl p GF (F83) is BALB.

The correct answer is "all of the above". Respiration is a process that involves the exchange of gases between an organism and its environment. It can occur in various organs such as the lungs and gills. Additionally, respiration is a mechanical process that relies on pressure gradients between tissues and blood. Therefore, all of the given statements are true and encompass the concept of respiration.

Daily cleaning of dog and other large animal cages or stalls is necessary to maintain their hygiene and prevent the buildup of waste, bacteria, and odors. Animals produce waste regularly, and leaving it uncleaned for longer periods can lead to health issues and discomfort for the animals. Daily cleaning also helps to ensure a clean and safe environment for both the animals and their caretakers.

The acronym TPR stands for Temperature, Pulse, and Respiration. This refers to the three vital signs that are commonly monitored in medical settings. Temperature measures the body's internal heat level, pulse measures the heart rate, and respiration measures the breathing rate. Monitoring these vital signs is important in assessing a person's overall health and detecting any abnormalities or changes that may indicate a medical condition.

The integumentary system is comprised of the skin. The skin is the largest organ of the body and is responsible for protecting the underlying tissues and organs, regulating body temperature, and sensing touch, pressure, and pain. It also helps in the production of vitamin D and plays a role in the immune system by acting as a barrier against pathogens.

The term "sterile" refers to a condition where no living organisms, including microorganisms, are present on a surface. This means that the surface has been completely free from any form of life, ensuring a high level of cleanliness and absence of potential pathogens. "Sanitized" and "disinfected" refer to processes that reduce the number of microorganisms on a surface, while "decontaminated" refers to the removal or neutralization of harmful substances. Therefore, "sterile" is the most appropriate term to describe the condition where no living organisms are present on a surface.

The correct answer is "Snuffles." Sneezing and the presence of a serous to mucopurulent nasal discharge are symptoms of the upper respiratory form of pasteurellosis, which is commonly known as snuffles. "Running nose," "wet nose," and "sneezes" are not specific terms used to describe this condition.

The correct answer is "environmental enhancement" because the sentence states that a plan must be developed and documented for non-human primates, and this plan must also be adhered to. The term "environmental enhancement" suggests that the plan should focus on improving or enhancing the environment for these primates, which is in line with the idea of developing and adhering to a plan for their well-being.

The Food and Drug Administration (FDA) is responsible for determining whether new medical devices, such as artificial joints and cardiac pacemakers, are safe and effective before they are approved for sale in the United States. The FDA is a government agency that regulates and oversees the safety and efficacy of drugs, medical devices, food, cosmetics, and other products. They conduct rigorous testing and review processes to ensure that medical devices meet the necessary standards before they can be sold to the public.

The correct answer is 240 mg; 6 ml. This is because the question asks for the drug amount (mg/grams) and the given dose rate is 1 ml per 5 pounds of body weight. Since the animal weighs 30 lbs, we can calculate the drug amount by multiplying the dose rate (1 ml) by the weight (30 lbs) divided by 5 (since 1 ml is given for every 5 pounds). This gives us 6 ml of the drug. Additionally, since the drug solution is 4%, we can calculate the drug amount by multiplying the volume (6 ml) by the concentration (4%). This gives us 240 mg of the drug.

Guinea pigs require a dietary source of vitamin C because they are unable to synthesize it on their own. Vitamin C is essential for their overall health and well-being as it helps in the formation and maintenance of connective tissues, wound healing, and the proper functioning of the immune system. Without enough vitamin C in their diet, guinea pigs can develop a condition called scurvy, which can lead to various health problems. Therefore, providing guinea pigs with a sufficient amount of vitamin C through their diet is crucial for their optimal health.

The correct answer states that housing cattle in intensive laboratory conditions should be avoided unless it is necessary for the experimental protocol. This suggests that the normal way to house cattle is not in such facilities and that it is only done when there is a specific need for research or teaching purposes.

To avoid getting bitten by a hamster, it is important to make sure that the hamster is awake and expects to be picked up. This means that the hamster is alert and aware of its surroundings, and it is comfortable with being handled. If the hamster is asleep or turned away from you, it may be startled or feel threatened when you try to pick it up, increasing the risk of being bitten. Therefore, it is crucial to handle a hamster when it is awake and shows signs of being ready to be picked up.

Laboratory Animal Technicians are responsible for administering medications, cleaning and maintaining animal habitats, and monitoring the health and well-being of lab animals. Conducting independent scientific research is typically the role of scientists or researchers, not technicians, although technicians may assist in research under the supervision of a scientist.

A typical NIH grant provides money for a three-year period. This means that the grant recipient will receive funding for their research project for a duration of three years. During this time, they can utilize the funds to conduct their research, collect data, and make progress towards their scientific goals. The three-year period allows researchers to have a sufficient amount of time to carry out their studies and potentially make significant contributions to their field of study.

Thoracic compression is not the preferred euthanasia method for birds. This method involves applying pressure to the bird's chest to cause death, which can be distressing and painful for the bird. Instead, the preferred euthanasia method for birds is considered to be inhalant anesthesia followed by cervical dislocation or decapitation, as these methods are considered to be more humane and quick.

Guinea pigs should be bred before they reach 7 months old. This is because after this age, female guinea pigs become less fertile and may experience complications during pregnancy and birth. Breeding them before this age ensures healthier and more successful pregnancies.

The total blood volume in an animal's body is approximately 6% of its body weight. This means that for every kilogram of an animal's body weight, around 60 milliliters of blood is present. Blood volume is an important factor in maintaining homeostasis and ensuring proper oxygen and nutrient transport throughout the body.

The receptive stance of the female in estrus, characterized by a fixed position with hindquarters elevated and tail to one side, is known as lordosis. This is a natural behavior displayed by female mammals during their fertile period to signal their readiness to mate. Hyperkaratosis refers to the thickening of the skin, anestrus is a period of sexual inactivity, and follicular stimulation involves the growth and development of ovarian follicles.

An endotracheal tube is a medical device that is used to deliver oxygen directly into the trachea, ensuring that the patient receives an adequate supply of oxygen. It is also used to prevent the aspiration of foreign material, such as saliva or vomit, into the lungs, which can lead to serious complications. Additionally, an endotracheal tube can serve as a resuscitation tool by allowing for the administration of medications or the performance of emergency procedures, such as cardiopulmonary resuscitation (CPR). Therefore, the correct answer is "all of the above" as an endotracheal tube can be used for all these purposes.

The correct answer is "US Government Principles for the Utilization in Testing, Research, and Training." The PHS Policy is a set of regulations and guidelines that govern the use of animals in research funded by the Public Health Service (PHS). It includes the Health Research Extension Act of 1985, which requires institutions to establish Institutional Animal Care and Use Committees (IACUCs) to oversee the use of animals in research. Additionally, the PHS Policy incorporates the US Government Principles for the Utilization in Testing, Research, and Training, which outline ethical considerations and guidelines for the use of animals in research.

During the conduct of a study, unplanned changes to a procedure are referred to as deviations. These deviations may occur due to unforeseen circumstances or errors, and they can impact the integrity and reliability of the study results. It is important to document and report these deviations to ensure transparency and to assess their potential impact on the study outcomes.

According to the Health Research Extension Act of 1985, the IACUC must inspect facilities at least semi-annually. This means that the inspections must occur twice a year. This ensures that the facilities are regularly monitored and maintained to meet the necessary standards for the well-being of animals involved in research.

Adjunctive methods are not considered acceptable as the sole method of euthanasia. They are additional methods that can be used in conjunction with other methods to ensure a more humane and effective euthanasia process. The correct answer is False, indicating that adjunctive methods are not acceptable as the sole method of euthanasia.

The lymphatic system is responsible for regulating fluid balance between tissue and blood plasma. It helps to maintain the proper balance of fluids in the body by collecting excess fluid from the tissues and returning it to the bloodstream. This helps to prevent the accumulation of fluid and swelling in the tissues. Additionally, the lymphatic system plays a role in immune function by filtering and removing waste, toxins, and pathogens from the body.

The correct answer is EDTA. EDTA stands for ethylenediaminetetraacetic acid, which is an anticoagulant commonly used in purple top tubes. It works by binding to calcium ions, which are necessary for blood clotting, thus preventing the blood from clotting. EDTA is used for tests that require whole blood or plasma, such as complete blood count (CBC), blood typing, and blood glucose testing. Sodium citrate is commonly used as an anticoagulant in light blue top tubes for coagulation tests, ACD (acid citrate dextrose) is used for preserving blood for blood transfusions, and heparin is used as an anticoagulant in green top tubes for certain chemistry tests.

Microwave irradiation requires a special irradiator because regular household microwaves are not designed to handle the specific requirements and safety measures needed for controlled and efficient irradiation. A special irradiator is necessary to ensure that the microwave energy is properly contained and directed towards the desired target, while also preventing any potential harm to the operator or the surrounding environment.

Cedar is not recommended as bedding material for gerbils because it can cause irritation to their skin and mucous membranes.

Birds and reptiles can carry and transmit salmonella. Salmonella is a type of bacteria that can cause food poisoning in humans. Dogs and cats, nonhuman primates and swine, and birds and cattle are not known to be carriers of salmonella.

Bite wounds are the most common problem seen in group-housed primates. This suggests that primates in group housing often engage in aggressive behavior and bite each other, resulting in injuries. This could be due to competition for resources, territorial disputes, or social hierarchy within the group. The presence of bite wounds indicates a potential issue with aggression and social dynamics in the primate group.

Nonhuman primates are susceptible to various health problems, and two of the most common ones are bacterial enteritis and bacterial pneumonia. Bacterial enteritis refers to the inflammation of the intestine caused by bacterial infection, leading to symptoms like diarrhea and abdominal pain. Bacterial pneumonia, on the other hand, is an infection of the lungs caused by bacteria, resulting in symptoms such as coughing, difficulty breathing, and fever. These two conditions are prevalent among nonhuman primates and can significantly impact their health and well-being.

The per diem should be .08 because it is the correct answer that satisfies the given information. The question states that it costs $6000.00 per year to maintain 200 rats. To find the per diem, we need to divide the total cost by the number of rats. $6000.00 divided by 200 rats equals $30.00 per rat per year. To find the per diem, we need to divide $30.00 by 365 days. This equals approximately .08, which is the correct answer.

The PHS Policy mandates the maintenance of assurance records for a specific period after the completion of an activity. In this case, the correct answer is "three," indicating that these records must be kept for at least three years. This requirement ensures that there is a sufficient record of grant applications, research proposals, and changes in research activities for future reference and potential audits.

Primates and guinea pigs cannot synthesize vitamin C because they lack the enzyme L-gulonolactone oxidase, which is necessary for the synthesis of vitamin C in the body. This enzyme is present in most mammals, allowing them to produce their own vitamin C. However, primates and guinea pigs have lost the ability to produce this enzyme through evolution, making them unable to synthesize vitamin C and requiring them to obtain it through their diet.

AAALAC International is not a government-sponsored agency. It is a private, nonprofit organization that provides voluntary accreditation for animal care and use programs. It conducts site visits every three years and requires annual reports from its accredited facilities.

Gerbils do not produce a good model for polygamous mating systems because they are monogamous animals, meaning they form long-term pair bonds with a single partner. In polygamous mating systems, individuals have multiple mates, which is not the case for gerbils. Therefore, gerbils would not be suitable for studying the dynamics and behaviors associated with polygamous mating systems.

The Whitten effect refers to the phenomenon where the addition of a male to a cage that previously only housed females leads to the initiation of estrus in the females after approximately three days. This effect is commonly observed in rodent studies and is believed to be triggered by the presence of male pheromones, which synchronize the reproductive cycles of the females. This synchronization can increase the chances of successful mating and reproduction in the group.

Fish actually have a high tolerance for CO2, so it is not a rapid method of euthanasia for these animals.

False. The "Guide" being referred to here is likely the "Guide for the Care and Use of Laboratory Animals," a publication by the National Research Council in the United States. This guide provides recommendations and guidelines for the humane care and use of animals in research, teaching, and testing. While it covers various species, including farm animals, there isn't a separate version of the Guide specifically dedicated to farm animals used in research. The principles and guidelines outlined in the Guide for the Care and Use of Laboratory Animals are intended to be applied to all animals used in research, regardless of species, to ensure their humane treatment and well-being. However, it is important to note that additional guidelines or regulations may exist at national, regional, or institutional levels to address specific concerns or requirements related to the use of farm animals or other specific species in research.

The left ventricle is responsible for pumping oxygenated blood to all the organs of the body. This is because the left ventricle receives oxygen-rich blood from the lungs and then contracts to propel this oxygenated blood into the aorta, which is the largest artery in the body. From the aorta, the oxygenated blood is distributed to all the organs and tissues, ensuring that they receive the necessary oxygen and nutrients for proper functioning. Therefore, the correct answer is all the organs of the body.

During necropsy, tissue samples are collected for further examination. To ensure proper fixation, the tissue samples need to be sectioned or cut to a specific thickness. The correct answer of 1 cm is the most appropriate choice because it allows for optimal fixation of the tissue samples. Cutting the samples to a thickness greater than 1 cm may result in inadequate fixation, which can affect the accuracy of the examination and analysis of the tissues.

The correct answer is EPA. The Environmental Protection Agency (EPA) is responsible for enforcing the Toxic Substances Control Act (TSCA) relating to industrial chemicals. The TSCA gives the EPA the authority to regulate the manufacture, distribution, and use of chemicals in order to protect human health and the environment. The EPA sets standards, conducts inspections, and enforces regulations to ensure compliance with the TSCA.

In goats, cattle, and sheep, the breakdown of cellulose occurs in the rumen. The rumen is the first compartment of their multi-chambered stomach, where microbial fermentation takes place. This fermentation process allows the animals to break down cellulose, a complex carbohydrate found in plant cell walls, with the help of microorganisms such as bacteria and protozoa. The breakdown of cellulose in the rumen is essential for these animals to obtain nutrients from plant material and is a crucial step in their digestive process.

A fomite is an inanimate object that can harbor and transmit disease-causing microorganisms. Unlike a vector, which is usually a living organism like a mosquito or tick, a fomite does not actively transmit the disease but can passively transfer pathogens from one person or surface to another. This can occur through direct contact or by touching contaminated objects or surfaces. Examples of fomites include doorknobs, phones, and utensils. Therefore, the correct answer for this question is fomite.

Nude mice lack a thymus gland, which is a primary lymphoid organ responsible for the development and maturation of T cells. Without a thymus gland, nude mice have impaired immune responses, making them useful models for studying immune system function and transplantation. The other options (thyroid gland, pituitary gland, adrenal gland) are not directly related to the immune system and do not have the same impact on immune responses as the thymus gland.

In most U.S. states, ferrets are the only other animal besides dogs and cats that are legally required to be vaccinated against rabies. This is because ferrets are a common domestic pet that can potentially transmit rabies to humans through bites or scratches, making them a public health concern. There is also an USDA-approved rabies vaccine specifically licensed for ferrets, which is why they fall under the same mandatory vaccination requirements as dogs and cats. While other animals such as horses and cattle may also receive rabies vaccinations, they are not universally legally required to be vaccinated in the same way that dogs, cats, and ferrets are across most states.

All humans working with primates must be tested for tuberculosis because it is a highly contagious disease that can be transmitted from primates to humans. Tuberculosis is caused by bacteria that primarily affect the lungs, but can also affect other parts of the body. It is important for humans working with primates to be tested for tuberculosis in order to prevent the spread of the disease and protect both the primates and themselves. Rabies and Herpes B are also potential risks when working with primates, but they are not specifically mentioned in the question.

The correct answer is 5 because the question is asking for the number of chapters in the Guide for the care and use of laboratory animals. The answer 5 indicates that there are 5 chapters in the guide.

Proestrus is the stage of estrus where follicle development takes place. During this stage, the follicles in the ovaries start to develop and mature, preparing for ovulation. This is the initial phase of the estrus cycle and is characterized by an increase in estrogen levels, which leads to the development of a receptive uterus and the onset of behavioral changes in the female.

Husbandry and feeding mistakes are the most common cause of disease in chinchillas. This can include improper housing conditions, inadequate nutrition, and incorrect handling. These mistakes can weaken the chinchilla's immune system and make them more susceptible to various diseases and infections. It is important for chinchilla owners to provide proper care and nutrition to ensure the health and well-being of their pets.

A minimum/maximum thermometer is the most suitable instrument for generating the most information about temperature in a secondary enclosure of an animal facility. This type of thermometer records both the lowest and highest temperatures reached over a specific period, providing a comprehensive understanding of temperature fluctuations. An anemometer measures wind speed, a hygrometer measures humidity, and a standard thermometer only provides a current temperature reading.

Old world primates are more closely related to humans and have more zoonotic diseases compared to new world primates. This is because old world primates, such as apes and monkeys, share a more recent common ancestor with humans and have similar genetic and physiological characteristics. New world primates, on the other hand, are more closely related to dogs and rodents and therefore have fewer zoonotic diseases that can be transmitted to humans.

Decentralized is the correct answer because in this type of institution, each department has its own animal facility and operates independently with its own budget. This means that decision-making and control over the animals are distributed among the different departments, rather than being centralized in one central authority.

Hamsters are more solitary than social compared to other rodents such as mice, rats, and gerbils. They are known to prefer living alone and are less likely to interact or socialize with other members of their species. This behavior is different from mice, rats, and gerbils, which are more social and tend to live in groups or colonies. Therefore, the correct answer is Hamsters.

Splay leg is an abnormality where a rabbit is unable to abduct one or more limbs. This condition causes the legs to splay outwards, making it difficult for the rabbit to walk or hop properly. "Broke leg" refers to a fracture in the leg bone, "broke back" refers to a fracture in the spinal column, and "all above" is not a specific condition. Therefore, the correct answer is "Splay leg".

OLAW, or the Office of Laboratory Animal Welfare, is the government agency responsible for the general administration and coordination of the PHS Policy. The PHS Policy refers to the Public Health Service Policy on Humane Care and Use of Laboratory Animals, which sets guidelines for the ethical treatment of animals used in research funded by the Public Health Service. OLAW ensures that institutions comply with these guidelines and promotes the humane care and use of animals in research. USDA, NIH, and LAW are not specifically responsible for the administration and coordination of the PHS Policy.

According to the PHS Policy, the IACUC must have at least 5 members. This ensures that there is a diverse range of perspectives and expertise represented on the committee, allowing for a comprehensive review and evaluation of animal research protocols. With more members, the IACUC can effectively assess the ethical implications and potential risks associated with animal research, ultimately promoting animal welfare and scientific integrity.

When chinchillas are handled roughly, become agitated during handling, or fight, their fur may come out in patches. This is known as fur slip.

The recommended temperature range for secondary enclosures for most laboratory species is 19-26 degrees Celsius. To convert this to Fahrenheit, we can use the formula F = (C * 9/5) + 32. By plugging in the values, we get 66-79 degrees Fahrenheit.

The area of the surgical gown that is considered the sterile field is from the shoulders to the waist. This is because this area is most likely to come into contact with the surgical site and needs to be kept free from any contaminants to prevent infection.

In the event of an emergency such as cardiac or respiratory arrest, the first priority should be to establish an open airway. This is crucial in order to ensure that the individual can breathe properly and receive oxygen. By opening the airway, any obstructions or blockages can be cleared, allowing for the passage of air into the lungs. This initial step is essential in providing immediate assistance and increasing the chances of successful resuscitation.

The IACUC must file a copy of their review of animal care programs with the Director of NIH at least annually. This means that they are required to submit this report once every year to ensure compliance with animal care regulations and standards.

Rabbits are very susceptible to overheating and can easily suffer from heatstroke. Their thick fur and small size make it difficult for them to regulate their body temperature, especially in hot weather. Heatstroke can be extremely dangerous for rabbits and can lead to severe health issues or even death. Therefore, it is important to ensure that rabbits are kept in a cool and well-ventilated environment to prevent overheating.

Guinea pigs should not be housed with animal species such as rabbits, cats, and dogs that may carry Bordetella bronchiseptica subclinically because guinea pigs are susceptible to infection.

The given correct answer is "SAIDS; SRV". The term "SAIDS" is similar to AIDS in humans, but it is not related to HIV and is not infectious to humans. The acronym "SRV" refers to Simian Retrovirus, which is the virus that causes SAIDS in monkeys. This explanation clarifies that SAIDS is a similar condition to AIDS in humans, but it is specific to monkeys and does not pose a risk to human health.

Tricaine methane sulfonate solution should be buffered with sodium bicarbonate before use. Sodium bicarbonate is a commonly used buffer in biological and pharmaceutical applications. It helps to maintain the pH of the solution, ensuring stability and effectiveness of the Tricaine methane sulfonate. Other options such as sodium, saline, and bicarbonate alone may not provide the necessary buffering capacity required for the solution.

The correct answer is macaques. Macaques are a species of primates that can carry the Herpes B virus. Therefore, when working with this species, it is important to treat all macaques as potentially infectious carriers of the virus and take necessary precautions to prevent exposure. Squirrel monkeys and other types of monkeys are not specifically mentioned as carriers of the Herpes B virus in the given information.

USDA identification tags for dogs and cats must be retained for one year for possible review by a USDA inspector. This means that pet owners should keep the tags on their pets for a period of one year in case a USDA inspector wants to examine them. It is important to retain these tags as they serve as proof of compliance with USDA regulations and can be used to ensure the health and safety of the animals.

Bedded cages should be cleaned once a week to maintain cleanliness and hygiene for the animals. Cleaning the cages on a regular basis helps to remove waste, odors, and potential sources of infection. It also ensures that the animals have a clean and comfortable living environment. Cleaning the cages more frequently, such as daily or twice a week, may be excessive and unnecessary, while cleaning them less frequently, such as once every two weeks, may lead to unsanitary conditions for the animals. Therefore, cleaning bedded cages once a week strikes a balance between maintaining cleanliness and minimizing stress for the animals.

HEPA filters are highly efficient in removing particulate matter from the air. The given answer of 99.7% suggests that these filters can remove almost all of the particulate matter present in the air, leaving only a very small fraction behind. This high level of efficiency makes HEPA filters a popular choice for air purifiers and HVAC systems in order to improve indoor air quality and reduce the risk of respiratory problems caused by airborne pollutants.

The scientific name for the agent that causes "Snuffles" in rabbits is Pasteurella multocida. "Snuffles" is a common respiratory disease in rabbits, and Pasteurella multocida is the primary bacterial pathogen responsible for it. This bacterium can cause a range of symptoms, including nasal discharge, sneezing, and difficulty breathing. It is important to diagnose and treat "Snuffles" promptly to prevent the spread of the infection and to ensure the well-being of the rabbits.

The Guide refers to a vertebrate animal used in research, teaching, and testing, whereas PHS Policy refers to live, vertebrate animal used or intended for use for the same purposes

Herd health is the correct answer because it is a health care concept commonly used in laboratory animal medicine. It refers to the overall health and well-being of a group or population of animals, rather than focusing on individual animals. This concept is important in laboratory animal medicine as it helps to monitor and manage the health of a group of animals, ensuring their welfare and preventing the spread of diseases within the population.

The endotracheal tube is a flexible, cuffed tube that is placed in the trachea to facilitate assisted ventilation of an animal.

The term "W/W" refers to "Weight in Weight." This term is commonly used in various industries to express the concentration of a substance in a mixture. It indicates the weight of a particular component in relation to the total weight of the mixture. For example, if a solution is described as 10% W/W, it means that 10 grams of the substance are present in every 100 grams of the solution.

The Guide for the care and use of Agricultural Animals in Agricultural Research and teaching focuses on the humane care of animals used in production agriculture. This means that it does not cover animals used in biomedical research and teaching, as they have different requirements and considerations. The publication instead focuses on animals used for food and fiber research, as well as equine animals.

Automatic waterers, bottles, feeders, and buckets should be cleaned once a week. Regular cleaning is important to prevent the buildup of bacteria, algae, and other contaminants that can affect the quality of the water and feed. Cleaning them once a week ensures that they remain hygienic and safe for the animals to use.

Rats tend to become obese if they are allowed to eat as much as they want (ad libitum). To prevent obesity in rats during long-term studies, it is recommended to provide restricted feeding, meaning that their food intake is limited. This helps control their calorie intake and prevents excessive weight gain. Feeding a low-fat diet or only one to two bites of food a day may not be sufficient to prevent obesity in rats, while doing nothing would not address the issue of potential obesity. Restricted feeding is the most appropriate solution in this context.

The total blood volume in a rat is approximately 13-17 mls. This is because rats have a blood volume of approximately 60-80 ml/kg, and the average weight of a rat is around 218 g. By calculating the blood volume based on weight, we can estimate that a rat would have a blood volume of approximately 13-17 mls.

The correct order in which these species should be attended to is guinea pig first and then rabbit. This is because each species has its own specific care requirements and attending to the guinea pig first ensures that its needs are met before moving on to the rabbit. Additionally, transitioning from one species to another without proper care and preparation can be stressful for both animals.

The recommended number of strokes for scrubbing the surface of each arm prior to surgery is 10. This suggests that a thorough scrubbing is necessary to ensure cleanliness and reduce the risk of infection during the surgical procedure.

Animals such as pigeons, chickens, and alligators are likely to require higher temperatures than what is recommended for rodents and rabbits. This could be due to their natural habitat and physiological needs. Pigeons and chickens are birds that typically require warmer environments, while alligators are reptiles that are adapted to warmer climates. These animals may have different temperature requirements for optimal health and functioning compared to rodents and rabbits.

Toxicology is the scientific discipline or study of poisons, including their effects and detection. It examines the adverse effects of chemical, physical, or biological agents on living organisms, and it focuses on understanding the nature of these harmful substances and their impact on health.

Ferrets are commonly kept as pets, but they are also used in certain types of research studies. They are specifically used to screen compounds for their potential to cause emesis (vomiting), for neonatal intubation practice, and for drug studies. In these research areas, ferrets are used as replacements for dogs and cats.

The correct order to change the rooms in a facility that houses animals of various microbiological status is axenic, gnotobiotic, SPF, conventional, quarantine. This order ensures that the rooms with the highest level of microbiological control, such as axenic and gnotobiotic, are changed first to minimize the risk of contamination. The SPF and conventional rooms are then changed, followed by the quarantine room, which is typically used for newly arrived animals that may carry pathogens. This sequence helps maintain the integrity of the facility and minimize the spread of infectious agents.

Cervical dislocation can be used for immature rats weighing less than 200g and rabbits weighing less than 1kg.

Sendai Virus is the most likely pathogen to cause clinical respiratory disease in adult immunocompetent mice. This virus is known for causing respiratory infections in mice, particularly in adult mice with a healthy immune system. It is a common pathogen used in research studies to induce respiratory disease in mice for experimental purposes. MHV, Dehydration, and Rickettsia are not typically associated with causing respiratory disease in adult immunocompetent mice.

To reconstitute a 1g vial of freeze-dried drug to yield a 5% solution, you would add 20ml of diluent. This means that for every 1g of the drug, 20ml of diluent is needed to achieve a 5% concentration. Adding more or less diluent would result in a different concentration of the solution.