Eileen E. Henderson
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View article: Congenital vascular hamartoma in the spinal cord of a neonatal foal
Congenital vascular hamartoma in the spinal cord of a neonatal foal Open
A three-day-old Arabian filly with a history of not being able to stand unassisted after birth and lack of control overthe right front and right hind limbs. The filly had inadequate proprioceptive responses, with absent pain/withdraw answe…
View article: Spontaneous branchioblastoma in a koi carp
Spontaneous branchioblastoma in a koi carp Open
Gill neoplasia in fish is rare but has been reported in multiple elasmobranch and teleost species. Although more commonly a site of metastatic disease, primary neoplasms of the gill may occur, and both spontaneous and chemically induced tu…
View article: Enterotoxemia in a 2-day-old lamb produced by a <i>Clostridium perfringens</i> type D lambda toxin–positive strain
Enterotoxemia in a 2-day-old lamb produced by a <i>Clostridium perfringens</i> type D lambda toxin–positive strain Open
Clostridium perfringens type D is a gram-positive bacterium that causes enterotoxemia in sheep, goats, and, less frequently, other animals. This microorganism encodes 2 major toxins, alpha (CPA) and epsilon (ETX). Enterotoxemia occurs when…
View article: Rabbit hemorrhagic disease virus 2, 2010–2023: a review of global detections and affected species
Rabbit hemorrhagic disease virus 2, 2010–2023: a review of global detections and affected species Open
Rabbit hemorrhagic disease virus 2/genotype GI.2 (RHDV2/GI.2; Caliciviridae, Lagovirus) causes a highly contagious disease with hepatic necrosis and disseminated intravascular coagulation in several Leporidae species. RHDV2 was first detec…
View article: <i>Helicosporidium</i> sp. infection in a California kingsnake (<i>Lampropeltis californiae</i>): Spillover of a pathogen of invertebrates to a vertebrate host
<i>Helicosporidium</i> sp. infection in a California kingsnake (<i>Lampropeltis californiae</i>): Spillover of a pathogen of invertebrates to a vertebrate host Open
Helicosporidium is a genus of nonphotosynthetic, green algae in the family Chlorellaceae, closely related to Prototheca. It is a known pathogen of invertebrates, and its occurrence in vertebrates has not been documented. A captive, 10-mont…
View article: Redefining piscine lactococcosis
Redefining piscine lactococcosis Open
Piscine lactococcosis is a significant threat to cultured and wild fish populations worldwide. The disease typically presents as a per-acute to acute hemorrhagic septicemia causing high morbidity and mortality, recalcitrant to antimicrobia…
View article: Effects of Acipenserid herpesvirus 2 on the outcome of a Streptococcus iniae co-infection in white sturgeon (Acipenser transmontanus)
Effects of Acipenserid herpesvirus 2 on the outcome of a Streptococcus iniae co-infection in white sturgeon (Acipenser transmontanus) Open
Acipenserid herpesvirus 2 (AciHV-2) is a large double-stranded DNA virus in the family Alloherpesviridae that causes catastrophic outbreaks in young naive white sturgeon ( Acipenser transmontanus ) populations, with mortalities of up to 80…
View article: Botulism in fish: a review
Botulism in fish: a review Open
Published information about fish botulism is scant. We review here the current literature on fish botulism. Freshwater fish are susceptible to botulism. Only anecdotal evidence exists about possible botulism cases in saltwater fish. With o…
View article: Gingival squamous cell carcinoma in 2 lions under managed care
Gingival squamous cell carcinoma in 2 lions under managed care Open
Neoplasia is one of the main causes of euthanasia in geriatric captive nondomestic felids. However, few studies have examined oral tumors in these animals. We describe here the clinicopathologic features of gingival squamous cell carcinoma…
View article: Diagnosis, isolation and description of a novel amnoonvirus recovered from diseased fancy guppies, <i>Poecilia reticulata</i>
Diagnosis, isolation and description of a novel amnoonvirus recovered from diseased fancy guppies, <i>Poecilia reticulata</i> Open
The guppy, Poecilia reticulata , is one of the most common cultured ornamental fish species, and a popular pet fish highly desired by hobbyists worldwide due to its availability of many brilliantly coloured fish of many varieties. The susc…
View article: Enterotoxemia produced by lambda toxin–positive <i>Clostridium perfringens</i> type D in 2 neonatal goat kids
Enterotoxemia produced by lambda toxin–positive <i>Clostridium perfringens</i> type D in 2 neonatal goat kids Open
Enterotoxemia caused by Clostridium perfringens type D usually affects sheep and goats ≥ 2-wk-old. The main clinical signs and lesions of the disease are produced by the epsilon toxin (ETX) elaborated by this microorganism. However, ETX is…
View article: Equine abortion and stillbirth in California: a review of 1,774 cases received at a diagnostic laboratory, 1990–2022
Equine abortion and stillbirth in California: a review of 1,774 cases received at a diagnostic laboratory, 1990–2022 Open
Reproductive failure represents an important cause of economic loss for the equine industry. We reviewed the cases of equine abortion and stillbirth submitted to the California Animal Health and Food Safety Laboratory System, University of…
View article: Colonic sand impaction with cecal rupture and peritonitis in an adult African savanna elephant, and review of noninfectious causes of gastrointestinal disease in elephants
Colonic sand impaction with cecal rupture and peritonitis in an adult African savanna elephant, and review of noninfectious causes of gastrointestinal disease in elephants Open
Gastrointestinal disorders are among the most common disease processes in captive elephants. Colic is a frequent clinical presentation and may have several infectious and noninfectious causes. Ingestion of sand has been reported in elephan…
View article: Psittacid alphaherpesvirus 5 infection in Indian ringneck parakeets in southern California
Psittacid alphaherpesvirus 5 infection in Indian ringneck parakeets in southern California Open
Four Indian ringneck parakeets ( Psittacula krameri; syn. ringneck parrots or rose-ringed parakeets) were submitted by 2 private owners for autopsy following a history of dyspnea and death. Gross findings were varied and included thickenin…
View article: Clostridial Diseases of Horses: A Review
Clostridial Diseases of Horses: A Review Open
The clostridial diseases of horses can be divided into three major groups: enteric/enterotoxic, histotoxic, and neurotoxic. The main enteric/enterotoxic diseases include those produced by Clostridium perfringens type C and Clostridioides d…
View article: Development and efficacy of Streptococcus iniae live-attenuated vaccines in Nile tilapia, Oreochromis niloticus
Development and efficacy of Streptococcus iniae live-attenuated vaccines in Nile tilapia, Oreochromis niloticus Open
Streptococcus iniae is a re-emerging bacterial pathogen in freshwater and marine aquaculture worldwide. There are no commercial vaccines available for S. iniae in the United States, and autogenous vaccines are restricted to inactivated who…
View article: Bacterial and viral enterocolitis in horses: a review
Bacterial and viral enterocolitis in horses: a review Open
Enteritis, colitis, and enterocolitis are considered some of the most common causes of disease and death in horses. Determining the etiology of these conditions is challenging, among other reasons because different causes produce similar c…
View article: Rattlesnake envenomation in 2 Visayan warty pigs
Rattlesnake envenomation in 2 Visayan warty pigs Open
Rattlesnake envenomation is an important cause of morbidity and mortality in humans and animals in the southwestern United States and elsewhere. Two Visayan warty pigs ( Sus cebifrons) from a regional zoo were submitted for autopsy after b…
View article: Nutritional Wasting Disorders in Sheep
Nutritional Wasting Disorders in Sheep Open
The different ovine production and breeding systems share the cornerstone of keeping a good body condition to ensure adequate productivity. Several infectious and parasitic disorders have detrimental effects on weight gains and may lead to…
View article: Toxic Wasting Disorders in Sheep
Toxic Wasting Disorders in Sheep Open
Infectious and parasitic agents have been frequently associated with debilitating and wasting conditions in sheep. The prevalence of these agents has probably undermined the role of toxic causes as contributors to such disorders. In additi…