Taxonomy: Rodent | LafeberVet

Article Case Study

Lafeber Company was proud to sponsor the 2020 Association of Exotic Mammal Veterinarians Student Case Report Contest. Veterinary students from all over the world were encouraged to write a 2-page case report about an exotic companion mammal seen at their college of veterinary medicine or during a clinical experience. Submissions closed in March and judges from the Research Committee evaluated the 15 case reports received from eight countries. Judges were blinded to the students, mentors, co-authors, and institutions at which the cases were seen. Read the brief summaries of each winning case report.

Article

According to LitCovid, an open-resource literature hub developed with the support of the US National Institute of Health, over 14,000 relevant articles have been posted to PubMed on the 2019 novel coronavirus. Thousands more articles are available as pre-prints. Obviously this explosion of information can be intimidating for the busy veterinarian, but you can use the national and international resources (listed in Table) to stay current on the latest information. Then turn to this review article and our supplemental LafeberVet Literature Search as well as LafeberVet’s Coronavirus in Animals and Determinants of Viral Infectionto dive a bit deeper into our evolving knowledge of SARS-CoV-2.

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Introduction

Over 14,000 articles have been posted to PubMed on the 2019 novel coronavirus, known as SARS-CoV-2. Thousands more articles are available as pre-prints. Obviously this explosion of information can be intimidating for the busy veterinarian, but you can use the resources listed in Table 1 to stay current on the latest information. Then turn to […]

Article

What determines the viral host range?

One of the critical determinants of viral host range is the interaction between the coronavirus spike (S) protein (Fig 1) and the host cell receptor. Angiotensin-converting enzyme 2 (ACE2), a receptor for the attachment and uptake of the coronavirus that caused Severe Acute Respiratory Syndrome (SARS-CoV-1), is widely expressed […]

Article

Lafeber Company was proud to serve as the sponsor of an Association of Exotic Mammal Veterinarians Student Case Report Contest…

Article Case Study

A 3-year old intact male guinea pig was presented on emergency for suspected bloat and with a history of chronic hair loss. Clinical examination revealed non-pruritic symmetric truncal alopecia, thin skin, severe cachexia, and an abdominal fluid wave. Alkaline phosphatase, alanine transaminase, aspartate aminotransferase, gamma-glutamyl transferase, leukocytes (neutrophils), bilirubin, and serum cortisol were markedly elevated. Abdominal ultrasonography revealed peritoneal effusion, cholestasis, and cholelithiasis. Hyperadrenocorticism was diagnosed based on…

Article Case Study

An adult intact female guinea pig was presented with dysorexia, exhaustion and weight loss. Radiographic and ultrasound findings demonstrated a severe gas dilatation of the stomach, severe gallbladder distension, and abnormalities on the organ topography. On laparotomy, a 180-degree gastric dilatation and volvulus was noticed with a gallbladder obstruction, hepatic lipidosis, and adhesions between the bowels…

Article Case Study

Two guinea pigs suspected of having hyperthyroidism based on weight loss, presence of a cervical mass, and elevated total thyroxine (TT4) levels were confirmed to have active thyroid masses via scintigraphy with Technetium-99 and treated with radioactive iodine therapy (I¹³¹). Both patients responded initially with weight gain and a decrease in the TT4. The purpose of this case series is to describe the use of scintigraphy to aid in confirming a diagnosis of hyperthyroidism, as well as to show the benefits and effectiveness of using radioactive iodine therapy (I¹³¹) to treat hyperthyroidism in guinea pigs in order to provide the best treatment protocol.

Article

Even the most steadfast and seasoned veterinary anesthetist can find themselves intimidated by exotic animal patients. Standard veterinary anesthesia monitors are not designed to read the extremely high (or extremely low) heart rates and respiratory rates of some exotic animal patients. Despite these challenges, valuable information can be gathered from monitoring tools as well as hands-on techniques. Essential vital signs, such as heart rate and rhythm, respiratory rate and depth, body temperature, and mucous membrane color should all be evaluated.

Article

Arterial blood pressure is a function of heart rate, blood volume, stroke volume, and arterial compliance. Indirect arterial blood pressure is most commonly measured by Doppler ultrasound or non-invasive oscillometric monitors. What are the limitations of indirect blood pressure measurements in exotic animal patients? How is this technique unique in exotic companion mammals when compared to dogs and cats? How is this technique performed in birds and can this procedure be used in reptiles?

Article

The guinea pig is a gentle, highly social rodent, that commonly serves as a companion animal and an experimental model in North America and Europe. Food preferences are established early in life, and a guinea pig can refuse to eat if their food type or presentation is changed. For this reason, small mammal veterinarians recommend exposing juvenile guinea pigs to a variety of chows and vegetables. Guinea pigs also do not tolerate environmental changes well. When exposed to something perceived as dangerous, the response of the guinea pig is generally to freeze, or less commonly flight.

Article

The guinea pig is a popular companion animal and a common research model. Guinea pigs are useful in reproductive studies because they share many reproductive traits with human beings. This article reviews anatomy and physiology of the guinea pig reproductive tract and summarizes some clinically significant medical problems.

Article

Guinea pigs are small, docile rodents, that must be approached with great care. Accurate evaluation of patient health status requires a thorough history, careful visual examination, and a detailed physical examination. Like most prey species, the guinea pig frequently hides signs of pain and illness. To improve clinical success, take measures to minimize stress by maintaining the animal in a quiet exam room and approaching the patient in a slow, quiet manner. The hospitalized guinea pig can also benefit greatly from the presence of a bonded cage mate. Monitor appetite and eliminations carefully in the guinea pig, and offer the same diet as fed in the patient’s home whenever possible as guinea pigs establish strong food preferences early in life.

Client Education Handout

Proper management of the pregnant sow requires an understanding of the risk factors associated with pregnancy-related disease and an ability to recognize early signs of problems. This client education handout explains proper care of the breeding and pregnant sow and provides tips for careful monitoring. Download the PDF version to distribute to veterinary clients or modify the Word document for your hospital’s needs.

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Basic equipment for high-quality exotic companion mammal practice focuses on supportive care, such as fluid therapy, appropriate housing and nutritional support, as well as equipment needed for physical examination and basic techniques. This detailed equipment list also includes supplies recommended for surgical and anesthetic procedures as well as advanced diagnostic techniques.

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Although the principles of emergency medicine critical care are universal for all species, this approach must be balanced with an understanding of the unique aspects of small mammal medicine. Use this summary page to review the basic approach to the exotic companion mammal patient and select additional links to supplement your knowledge base.

Article

The approach to analgesia and sedation in exotic companion mammals faces special challenges, including small patient size and unique features of the prey species mentality. Recognition of pain is more difficult in rabbits and rodents because many small mammals are very good at hiding the signs of pain commonly observed in predator species. Instead pain in a rabbit or rodent is often inferred from the patient’s clinical condition as well as the absence of normal behaviors. The diagnostic and therapeutic plan frequently requires some form of chemical restraint in exotic mammal medicine. When compared to general anesthesia, sedation is a safer option for the debilitated or critically ill small mammal.

Article Video Webinar

Exotic small mammals can be challenging to safely induce, maintain and recover from general anesthesia. View the recording of this AAVSB R.A.C.E.-approved webinar, which explores clinical anesthesia in exotic companion mammals from patient assessment and anesthetic induction to monitoring and recovery. The use of common premedications, induction agents, maintenance drugs, and post-operative analgesics will be compared and contrasted in exotic companion mammals. Multimodal anesthetic techniques, such as epidural anesthesia and constant rate infusions, will also be discussed. After reviewing the recording, take the brief post-test to earn 1 hour of continuing education credit.

Article

A variety of agents may be used in small mammals with ectoparasites. Download this easy-to-use table for a list of agents used to manage lice, flea infestation, mange or acariasis.

Article

Released for National Veterinary Technician Week 2014, Nursing Care for Exotic Companion Mammals is part of an Exotic ICU series providing advice on the management of small exotic companion mammals in a critical care setting. Specific recommendations on caging, medicating, feeding, and monitoring the critical small mammal are explored as well as important potential sequelae to the stress of hospitalization.

Article

Like primates, guinea pigs require dietary vitamin C. Guinea pig treats should not only be high in vitamin C, but also low in calcium, carbohydrates and sugars, and high in dietary fiber…

Article

In 1985, a spiral-shaped microorganism was isolated from the duodenal ulcer of a ferret. Since that time, gastritis and peptic ulcers have been routinely reported in ferrets. In fact one of the reasons ferrets are kept as laboratory animals, is for the study of Helicobacter mustelae…

Article

High dietary levels of oxalic acid or oxalates may promote urolith or bladder stone formation in herbivores like the guinea pig and tortoise. The following chart shows the oxalate content in 100 grams of selected raw foods.

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The following chart shows the calcium content in 1 cup of selected foods. Select treats for adult rabbits and rodents that are high in fiber, low in calcium, and low in carbohydrates and sugars.

Article

Urolithiasis is characterized by single or multiple calculi throughout the urinary tract or by the presence of sandy material within the bladder and urethra. Uroliths are fortunately more of a historical disease in the ferret, while calculi are still an important problem in rabbits and rodents.

Differential Diagnosis List

Although some diseases are merely arranged alphabetically, other lists are based on the mnemonic acronym DAMNIT. This commonly used veterinary medical record scheme divides disease mechanisms into the following categories: degenerative, anomalous, metabolic, neoplastic or nutritional; infectious, inflammatory, idiopathic, immune-mediated, or infarct/vascular; and traumatic or toxic. Exercise professional judgment when evaluating this information. Differential Diagnosis in Mice is designed as an aide or reminder system for use by qualified veterinarians and should never be used for diagnostic decision-making.

Differential Diagnosis List

Although some diseases are merely arranged alphabetically, other lists are based on the mnemonic acronym DAMNIT. This commonly used veterinary medical record scheme divides disease mechanisms into the following categories: degenerative, anomalous, metabolic, neoplastic or nutritional; infectious, inflammatory, idiopathic, immune-mediated, or infarct/vascular; and traumatic or toxic. Exercise professional judgment when evaluating this information. Differential Diagnosis in Rats is designed as an aide or reminder system for use by qualified veterinarians and should never be used for diagnostic decision-making.

Differential Diagnosis List

Although some diseases are merely arranged alphabetically, other lists are based on the mnemonic acronym DAMNIT. This commonly used veterinary medical record scheme divides disease mechanisms into the following categories: degenerative, anomalous, metabolic, neoplastic or nutritional; infectious, inflammatory, idiopathic, immune-mediated, or infarct/vascular; and traumatic or toxic. Exercise professional judgment when evaluating this information. Differential Diagnosis in Gerbils is designed as an aide or reminder system for use by qualified veterinarians and should never be used for diagnostic decision-making.

Differential Diagnosis List

Although some diseases are merely arranged alphabetically, other lists are based on the mnemonic acronym DAMNIT. This commonly used veterinary medical record scheme divides disease mechanisms into the following categories: degenerative, anomalous, metabolic, neoplastic or nutritional; infectious, inflammatory, idiopathic, immune-mediated, or infarct/vascular; and traumatic or toxic. Exercise professional judgment when evaluating this information. Differential Diagnosis in Guinea Pigs is designed as an aide or reminder system for use by qualified veterinarians and should never be used for diagnostic decision-making.

Article

As in other species, to manage pain successfully, one must know when pain might occur. Several common medical disorders can result in acute pain such as otitis, conjunctivitis, and acute gastrointestinal disease. Chronic pain can arise from conditions such as arthritis, which commonly develops in older…

Differential Diagnosis List

Article

There are 87 known species and 14 genera of gerbil. The Mongolian Gerbil, also referred to as the desert rat, originates from Mongolia and Northern China and is an extremely good digger, digging with its front paws and kicking debris away with its strong hind legs.

Article

Eleven guinea pig breeds are recognized by the American Cavy Breeders Association: Abyssinian, Abyssinian Satin, American, American Satin…

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Herbivore nutrition separates animals into two main categories, depending on where food particles are broken down and fermented prior to absorption. The categories are foregut and hindgut fermenters, with the hindgut group being broken down into colonic and cecal fermenters.

Differential Diagnosis List

Article

Guinea pigs tend to be shy, sweet-natured creatures. Guinea pigs are prey species. Their survival depends on the ability to be alert and respond quickly, and they possess acute senses of smell and hearing. Approach guinea pigs in a calm, quiet manner…

Article

Providing nutrition to the hospitalized small mammal is a fairly straightforward process. Encourage owners to bring their pet’s “regular” diet to minimize the risk of food refusal or gastrointestinal upset. Also consider keeping the following food items available…

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Insufficient dietary fiber can turn a happy, healthy rabbit into a HUGE, potentially catastrophic, clinical problem. Read about the basis for a healthy diet in Hay: Feeding Small Herbivores, reviewed by forage extension specialist, S. Ray Smith.

Article

Diarrhea is the most common problem in pet hamsters. In a recent survey of two large American commercial breeding facilities, approximately 3% of shipped hamsters develop diarrhea. Diarrhea caused by enterocolitis can occur in hamsters of any age or breed and is commonly known as “wet-tail”. Clinical signs in weanlings usually include diarrhea, anorexia, ruffled hair, dehydration, weight loss, and death. The mortality rate is often highest in…

Article

The principles of fluid therapy are basically the same in exotic companion mammals as in other species. The biggest difference is that changes can occur very rapidly in these tiny patients. For instance, fluids should almost always be warmed or your patient will cool down quickly. Intraosseous or intravenous fluids can be heated with…

Article

Blood collection is challenging in rats and mice, and heavy sedation or general anesthesia is almost always required in clinical practice. Increasing patient body temperature to promote vasodilation can also be helpful. Gently warm the rodent by placing its cage on a heating pad set on low or by placing the cage in an incubator set at 39°C (102°F) for 5 to 10 minutes. Monitor the patient carefully…

Article

External reproductive anatomy is obvious in some adult small mammals such as the ferret, sugar glider, hedgehog, rat, guinea pig, and hamster. Gender determination or sexing can be challenging in some species like the chinchilla, and in many neonatal rodents. In these cases, reliance on anogenital distance or the distance between the rectum and the urogenital region is considered best practice.

Article

Although fungal disease is uncommon in small mammals, dermatophytosis is the most common mycosis seen in clinical practice. Despite the low incidence of clinical disease, rodents are common asymptomatic carriers of dermatophytes. Fungal pathogens are generally more important for their zoonotic potential. Rodents are frequently asymptomatic carriers of ringworm, and transmission of disease to human caretakers is not uncommon.

Article

Can’t quite recall the dental formula of the African pygmy hedgehog–or perhaps you never knew? Use LafeberVet’s “Small Mammal Dental Formulas: Cheat Sheet” as a quick and easy clinical resource.

Article

Acquired dental disease is an important problem in pet rabbits and rodents. Clinical management of dental disease is complex, frequently involving invasive technical procedures, therefore it is preferable to promote dental health, rather than treating dental disease. What are five things you can do to promote dental health in small herbivores?

Article Presenting Problem

Unfortunately respiratory disease is common in pet rats. Although most cases of respiratory disease in the rat are multifactorial, the most significant and serious bacterial pathogen is Mycoplasma pulmonis. Institute medical therapy as soon as possible in rats with respiratory disease since this improves…

Article

This brief article was created to serve as a synopsis of LafeberVet’s longer, more detailed “Analgesia in Small Mammals” authored by veterinary anesthesiologist, Dr. Paul Flecknell.

Article

Most small herbivores like the rabbit, guinea pig, and chinchilla possess a simple, non-compartmentalized stomach paired with a large cecum and colon. To feed the small herbivore gastrointestinal tract, provide insoluble dietary fiber to stimulate gut motility and maintain gastrointestinal health. A balanced small herbivore diet contains adequate fiber (minimum 25%), minimal starch, and moderate protein levels. Among small herbivorous non-ruminants, the gastrointestinal tract of the rabbit is the most specialized and this manuscript will focus on unique features of this species’ anatomy and physiology.

Article Video Webinar

Manual restraint of exotic companion mammals is a challenging but necessary part of veterinary practice. In the recording of this R.A.C.E.-approved webinar, Ms. McClellan reviews the approach to predator and prey species as well as the principles of capture and handling of several species of small exotic companion animals in a hospital setting including from rabbits, guinea pigs, and chinchillas to small rodents, hedgehogs, and sugar gliders.

Quiz

Veterinary nurses and veterinary technicians take the post-test. With a passing grade of 70% or higher, you will receive a continuing education certificate for 1 hour of continuing education credit in jurisdictions that recognize AAVSB R.A.C.E. approval.

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