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Journal of Veterinary Diagnostic Investigation

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https://www.readbyqxmd.com/read/27852816/occurrence-of-primary-lymphocytic-hypophysitis-in-two-horses-and-presence-of-scattered-t-lymphocytes-in-the-normal-equine-pituitary-gland
#1
Llorenç Grau-Roma, Robert Peckham, Jacqui Paton, Anina Stahel, Simone de Brot
The postmortem examination of a 14-year-old Appaloosa gelding with clinically diagnosed pituitary pars intermedia dysfunction showed a unique finding of moderate multifocal lymphocytic hypophysitis (LH). The pituitary glands of 24 horses submitted for postmortem examination were examined grossly and examined histologically for the presence of lymphocytes. Of these 23 horses, 1 additional case suffered from moderate LH. The 2 cases with LH tested negative for Equid herpesvirus 1 and 4 by polymerase chain reaction and immunohistochemistry (IHC), and no viral particles were observed by electron microscopy in 1 case examined...
November 15, 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27852815/alcohol-based-solutions-for-bovine-testicular-tissue-fixation
#2
Nelson C Cabrera, Jorge R Espinoza, Paul Vargas-Jentzsch, Patricio Sandoval, Luis A Ramos, Pedro M Aponte
Tissue fixation, a central element in histotechnology, is currently performed with chemical compounds potentially harmful for human health and the environment. Therefore, alternative fixatives are being developed, including alcohol-based solutions. We evaluated several ethanol-based mixtures with additives to study fixative penetration rate, tissue volume changes, and morphologic effects in the bovine testis. Fixatives used were Bouin solution, 4% formaldehyde (F4), 70% ethanol (E70), E70 with 1.5% glycerol (E70G), E70 with 5% acetic acid (E70A), E70 with 1...
November 15, 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27852814/spontaneous-proliferative-and-neoplastic-lesions-in-thyroid-and-parathyroid-glands-of-nondomestic-felids
#3
Jenny P Pope, James Steeil, Edward C Ramsay, Danielle Reel, Shelley J Newman
Based on microscopic and immunohistochemical characterization, we documented spontaneous proliferative and neoplastic lesions in the thyroid and parathyroid glands of nondomestic felids. Ten animals (4 leopards, 3 tigers, and 3 cougars), all with a previous diagnosis of thyroid neoplasia were identified from the University of Tennessee College of Veterinary Medicine database. The mean age of affected animals was 15.9 y. Twelve neoplasms were identified; 2 animals had 2 concurrent neoplasms. After immunohistochemical characterization using a panel of chromogranin A, thyroglobulin, and calcitonin, 7 of the former thyroid neoplasms were diagnosed as thyroid adenomas, 1 was diagnosed as a thyroid carcinoma, and 4 were diagnosed as parathyroid adenomas...
November 15, 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27852813/initial-development-and-preliminary-evaluation-of-a-multiplex-bead-assay-to-detect-antibodies-to-ehrlichia-canis-anaplasma-platys-and-ehrlichia-chaffeensis-outer-membrane-peptides-in-naturally-infected-dogs-from-grenada-west-indies
#4
Melinda J Wilkerson, Kelley E Black, Marta Lanza-Perea, Bhumika Sharma, Kathryn Gibson, Diana M Stone, Anushka George, Arathy D S Nair, Roman R Ganta
Tick-borne bacteria, Ehrlichia canis, Anaplasma platys, and Ehrlichia chaffeensis are significant pathogens of dogs worldwide, and coinfections of E. canis and A. platys are common in dogs on the Caribbean islands. We developed and evaluated the performance of a multiplex bead-based assay to detect antibodies to E. canis, A. platys, and E. chaffeensis peptides in dogs from Grenada, West Indies, where E. canis and A. platys infections are endemic. Peptides from outer membrane proteins of P30 of E. canis, OMP-1X of A...
November 15, 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27852812/a-retrospective-study-of-the-prevalence-of-calcium-oxalate-crystals-in-veterinary-aspergillus-cases
#5
Courtney L Payne, Michael J Dark, Julia A Conway, Lisa L Farina
Fungi in the genus Aspergillus are some of the most common fungal pathogens in veterinary species, primarily affecting the respiratory tract. In both human and veterinary cases, calcium oxalate crystals have been documented in sites of Aspergillus infection. Cases in multiple species (16 birds, 15 horses, 5 dogs, 1 ox, and 1 dolphin) were identified that had either positive cultures for Aspergillus sp., or had conidiophores present that could be identified as belonging to the genus Aspergillus Histologic slides were examined to confirm the presence of oxalate crystals and how often they were identified on the original report...
November 15, 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27852811/adrenal-function-in-cats-with-cholestatic-liver-disease
#6
Faith I Buckley, Orla Mahony, Cynthia R L Webster
Cats with cholestatic liver disease experience significant morbidity and mortality when they undergo invasive procedures under anesthesia. Although inadequate adrenal response might account for these outcomes, adrenal function in cats with cholestatic liver disease has not been documented, to our knowledge. The goal of our study was to describe adrenal function in these cats. Twenty-seven cats with a serum bilirubin >230 µmol/L (3 mg/dL) and serum alanine aminotransferase >2 times the upper limit of normal had pre- and 60-min post-adrenocorticotropic hormone (ACTH) cortisol analysis after administration of 5 µg/kg cosyntropin intravenously...
November 15, 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27738297/letter-to-the-editor
#7
Melissa Behr, Robert Rudd, David Driemeier
No abstract text is available yet for this article.
November 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27701078/spontaneous-reproductive-pathology-in-female-guinea-pigs
#8
Tamara Veiga-Parga, Krista M D La Perle, Shelley J Newman
Reproductive pathology of domestic guinea pigs is underreported to date. To provide a comprehensive review of uterine disease in guinea pigs, we performed a retrospective study of the pathology archives of the University of Tennessee, College of Veterinary Medicine. By histology, 13 of 37 uterine lesions in 23 animals were neoplastic; the other 24 nonneoplastic lesions included cystic endometrial hyperplasia (16 of 24), endometrial hemorrhage (3 of 24), pyometra (2 of 24), polyp (2 of 24), and mucometra (1 of 24)...
November 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27701077/evaluation-and-improvement-of-a-single-nucleotide-polymorphism-based-pcr-assay-for-rapid-differentiation-of-live-attenuated-vaccine-strains-from-field-isolates-of-erysipelothrix-rhusiopathiae
#9
Weifeng Zhu, Jingtao Li, Ya Wang, Chao Kang, Meilin Jin, Huanchun Chen
A single nucleotide polymorphism-based PCR assay has been developed to differentiate the attenuated vaccine strain used in Japan from field isolates of Erysipelothrix rhusiopathiae found in pigs. However, this assay has been evaluated with only Japanese strains and isolates; therefore, it is unknown whether it could be used in other countries with E. rhusiopathiae strains and isolates of different genetic backgrounds. In our study, the PCR assay was evaluated using Chinese E. rhusiopathiae vaccine strains and field isolates...
November 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27698175/canine-mammary-minute-oncocytomas-with-neuroendocrine-differentiation-associated-with-multifocal-acinar-cell-oncocytic-metaplasia
#10
Rei Nagahara, Masayuki Kimura, Megu Itahashi, Go Sugahara, Masashi Kawashima, Hirotada Murayama, Toshinori Yoshida, Makoto Shibutani
Two solitary and minute tumors of 1 and 1.5 mm diameter were identified by microscopy in the left fourth mammary gland of a 13-year-old female Labrador Retriever dog, in addition to multiple mammary gland tumors. The former tumors were well circumscribed and were composed of small-to-large polyhedral neoplastic oncocytes with finely granular eosinophilic cytoplasm, and were arranged in solid nests separated by fine fibrovascular septa. Scattered lumina of variable sizes containing eosinophilic secretory material were evident...
November 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27698174/coinfection-by-cetacean-morbillivirus-and-aspergillus-fumigatus-in-a-juvenile-bottlenose-dolphin-tursiops-truncatus-in-the-gulf-of-mexico
#11
Stephen E Cassle, Nelmarie Landrau-Giovannetti, Lisa L Farina, Angelique Leone, James F X Wellehan, Nicole I Stacy, Patrick Thompson, Hada Herring, Blair Mase-Guthrie, Uriel Blas-Machado, Jeremiah T Saliki, Michael T Walsh, Thomas B Waltzek
A recently deceased juvenile male bottlenose dolphin (Tursiops truncatus) was found floating in the Gulf of Mexico, off Sand Key in Clearwater, Florida. At autopsy, we identified pneumonia and a focus of malacia in the right cerebrum. Cytologic evaluation of tissue imprints from the right cerebrum revealed fungal hyphae. Fungal cultures of the lung and brain yielded Aspergillus fumigatus, which was confirmed by amplification of a portion of the fungal nuclear ribosomal internal transcribed spacer 2 region sequence...
November 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27698173/pseudomonas-aeruginosa-mastitis-in-two-goats-associated-with-an-essential-oil-based-teat-dip
#12
E Jane Kelly, David J Wilson
Pseudomonas aeruginosa is an opportunistic pathogen that has been associated with mastitis in dairy animals, including goats. Often, the environmental sources of the bacteria are water-related (such as hoses and muddy pastures). Mastitis attributable to P. aeruginosa was identified in 2 goats in a small herd. Efforts were made to identify environmental sources of the pathogen. Multiple samples from the goats' environment were cultured, including water from the trough, bedding, the hose used to wash udders, and the teat dip and teat dip containers...
November 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27698172/unclassified-sarcomas-a-study-to-improve-classification-in-a-cohort-of-golden-retriever-dogs
#13
Kim M Boerkamp, Eva Hellmén, Helena Willén, Guy C M Grinwis, Erik Teske, Gerard R Rutteman
Morphologically, canine soft-tissue sarcomas (STSs) resemble human STSs. In humans, proper classification of STSs is considered essential to improve insight in the biology of these tumors, and to optimize diagnosis and therapy. To date, there is a paucity of data published on the significance of detailed classification of STSs in the dog. We revised a cohort (n = 110) of proliferative lesions obtained from a study in Golden Retrievers that were considered "soft tissue sarcoma, not otherwise specified or of uncertain subtype" in order to optimize the diagnoses of these lesions...
November 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27698171/mycobacterium-haemophilum-infection-in-a-juvenile-leatherback-sea-turtle-dermochelys-coriacea
#14
Kyle Donnelly, Thomas B Waltzek, James F X Wellehan, Nicole I Stacy, Maria Chadam, Brian A Stacy
Mycobacteriosis is infrequently reported in free-ranging sea turtles. Nontuberculous Mycobacterium haemophilum was identified as the causative agent of disseminated mycobacteriosis in a juvenile leatherback turtle (Dermochelys coriacea) that was found stranded on the Atlantic coast of Florida. Disseminated granulomatous inflammation was identified histologically, most notably affecting the nervous system. Identification of mycobacterial infection was based on cytologic, molecular, histologic, and microbiologic methods...
November 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27698170/snake-fungal-disease-caused-by-ophidiomyces-ophiodiicola-in-a-free-ranging-mud-snake-farancia-abacura
#15
Lisa A Last, Heather Fenton, Jessica Gonyor-McGuire, Matthew Moore, Michael J Yabsley
Snake fungal disease is an emerging infectious disease caused by the fungus Ophidiomyces ophiodiicola leading to severe dermatitis and facial disfiguration in numerous free-ranging and captive snakes. A free-ranging mud snake (Farancia abacura) from Bulloch County, Georgia, was presented for autopsy because of facial swelling and emaciation. Extensive ulceration of the skin, which was especially severe on the head, and retained shed were noted on external examination. Microscopic examination revealed severe heterophilic dermatitis with intralesional fungal hyphae and arthroconidia consistent with O...
November 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27698169/evaluation-of-a-pcr-assay-on-overgrown-environmental-samples-cultured-for-mycobacterium-avium-subsp-paratuberculosis
#16
Juan C Arango-Sabogal, Olivia Labrecque, Julie Paré, Julie-Hélène Fairbrother, Jean-Philippe Roy, Vincent Wellemans, Gilles Fecteau
Culture of Mycobacterium avium subsp. paratuberculosis (MAP) is the definitive antemortem test method for paratuberculosis. Microbial overgrowth is a challenge for MAP culture, as it complicates, delays, and increases the cost of the process. Additionally, herd status determination is impeded when noninterpretable (NI) results are obtained. The performance of PCR is comparable to fecal culture, thus it may be a complementary detection tool to classify NI samples. Our study aimed to determine if MAP DNA can be identified by PCR performed on NI environmental samples and to evaluate the performance of PCR before and after the culture of these samples in liquid media...
November 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27698168/evaluation-of-supervised-machine-learning-algorithms-to-distinguish-between-inflammatory-bowel-disease-and-alimentary-lymphoma-in-cats
#17
Abdullah Awaysheh, Jeffrey Wilcke, François Elvinger, Loren Rees, Weiguo Fan, Kurt L Zimmerman
Inflammatory bowel disease (IBD) and alimentary lymphoma (ALA) are common gastrointestinal diseases in cats. The very similar clinical signs and histopathologic features of these diseases make the distinction between them diagnostically challenging. We tested the use of supervised machine-learning algorithms to differentiate between the 2 diseases using data generated from noninvasive diagnostic tests. Three prediction models were developed using 3 machine-learning algorithms: naive Bayes, decision trees, and artificial neural networks...
November 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27698167/hernia-of-the-swim-bladder-aerocystocele-with-concurrent-mycotic-granulomatous-inflammation-and-swim-bladder-carcinoma-in-a-wild-mullet-mugil-cephalus
#18
Rubina Sirri, Carlo Bianco, Gaetano Zuccaro, Maria Elena Turba, Luciana Mandrioli
We describe a hernia of the swim bladder, with a concurrent mycotic granulomatous inflammation, and carcinoma of the swim bladder in a wild mullet (Mugil cephalus) referred for an exophytic dorsal mass. Grossly, the mass was white, soft, and composed of multiple cystic gas-containing chambers connected by a funnel-shaped tissue segment to the coelomic swim bladder. Histologically, the mass was characterized by cysts of variable size, multifocally contiguous with the subepithelial rete mirabile, supported by abundant fibrous tissue...
November 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27698166/validation-of-three-automated-assays-for-total-antioxidant-capacity-determination-in-canine-serum-samples
#19
Camila Peres Rubio, Josefa Hernández-Ruiz, Silvia Martinez-Subiela, Asta Tvarijonaviciute, Marino Bañón Arnao, José Joaquín Ceron
We performed analytical validation of 3 automated assays of the total antioxidant capacity (TAC) in canine serum and evaluated their use in dogs with inflammatory bowel disease. The assays were based on the generation of a 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) radical cation (ABTS•(+)) in aqueous media, which produces a blue-green color. The antioxidants present in the sample remove the chromogen in proportion to their concentrations. The assays differed mainly in the way in which this radical was produced...
November 2016: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/27698165/concurrent-spindle-cell-thymoma-and-thymic-cysts-in-a-barbary-sheep-ammotragus-lervia-case-report-and-review-of-the-literature
#20
Wen-Ta Li, Hui-Wen Chang, Chian-Ren Jeng, Chen-Hsuan Liu, Fun-In Wang, Li-Jen Chang, Victor Fei Pang
An ~21-year-old female Barbary sheep (Ammotragus lervia) died spontaneously following a lengthy episode of difficulty in walking. An ~6 × 3 × 3 cm, unilocular cystic growth was found in the cranioventral thorax. The fibrotic cystic wall, lined by a single layer of flattened to cuboidal epithelial cells, was invaginated and partially encircled solid masses of fusiform neoplastic cells with multiple intratumoral cystic structures. The fusiform neoplastic cells were intensely positive for cytokeratin (CK) and partially positive for α-smooth muscle actin and vimentin, but negative for thyroid transcription factor-1 (TTF-1) and neuron-specific enolase (NSE)...
November 2016: Journal of Veterinary Diagnostic Investigation
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