Vasculitis Associated with Parrot Bornavirus 4 Infection in a Rose-Crowned Parakeet (Pyrrhurarhodocephala).

A 3-month-old, female rose-crowned parakeet (Pyrrhura rhodocephala) was found dead after a 24-h course of lethargy and passing blood-tinged faeces. Fine white streaks were seen in the pectoral muscles on necropsy. Microscopic examination revealed typical lesions of avian ganglioneuritis and vascular necrosis in the pectoral muscles, myocardium, kidneys, air sacs, adrenal glands, pancreas and thyroid gland. These lesions were characterized by mural fibrinoid necrosis of small and medium-calibre arteries and arterioles, associated with lymphoplasmacytic inflammation, necrosis, atrophy and fibrosis of the surrounding tissues. Parrot bornavirus (PaBV) nucleoprotein was demonstrated by immunohistochemistry in smooth muscle and endothelial cells of many vessels. An avian bornavirus was isolated from kidney tissue and its identity confirmed as PaBV-4 by sequencing and phylogenetic analysis. We postulate that the vascular lesions could have been immune-mediated and that PaBV-4 may have played a role in its pathogenesis.

High female mortality caused by an atypical Mycobacterium species closely related to the Mycobacterium ulcerans-marinum complex in a colony of bearded dragons (Pogona vitticeps).

A commercial breeding colony of bearded dragons (Pogona vitticeps) experienced an increase in mortality that affected females only. Before death, the animals had lost appetite and weight, were dehydrated, and some had labored breathing. Necropsy revealed granulomas in many organs (ovaries, lungs, liver, kidneys, heart, bone marrow) in which numerous acid-fast bacteria were identified. Bacterial isolation confirmed Mycobacterium spp., which was identified by whole genome sequencing as closely related to the Mycobacterium ulcerans-marinum complex. Due to the zoonotic potential of this bacterium and the poor prognosis for the remaining sick animals, the entire colony was culled and 7 animals were evaluated. The possible routes for introduction of this bacterium, the female predisposition to the disease, as well as the zoonotic potential of this microorganism are discussed. Key clinical message: An atypical Mycobacterium species closely related to Mycobacterium ulcerans-marinum complex can cause high female morality in captive bearded dragons.

Mortalité élevée de femelles dans une colonie de dragons barbus (Pogona vitticeps) causée par une mycobactérie atypique étroitement reliée au complexe Mycobacterium ulcerans-marinum . Une augmentation de la mortalité affectant uniquement les femelles est survenue dans une colonie de dragons barbus reproducteurs. Avant leur mort, ces animaux étaient anorexiques, amaigris, déshydratés et certains respiraient la gueule ouverte. Leur nécropsie révéla la présence de granulomes dans plusieurs viscères (poumons, coeur, reins, foie, ovaires, moelle osseuse), dans lesquels des bacilles acido-alcoolo-résistants étaient visibles à l'examen microscopique. L'isolement bactérien a permis de confirmer qu'il s'agissait bien de Mycobacterium spp. et les analyses moléculaires ont démontré que cette mycobactérie était étroitement reliée au complexe Mycobacterium ulcerans-marinum. À cause du potentiel zoonotique de cette infection et du pronostic sombre, la colonie entière fut euthanasiée et sept (7) animaux soumis pour nécropsie. Les causes potentielles d'introduction de cette bactérie dans la colonie, la prédisposition particulière des femelles à cette infection et le risque zoonotique qui y est associé seront discutés.Message clinique clé :Une mycobactérie étroitement associée au complexe Mycobacterium ulcerans-marinum peut causer une mortalité élevée chez les dragons barbus en captivité et cibler tout particulièrement les femelles.(Traduit par les auteurs).

Esophagitis and Pharyngitis Associated with Avian Infectious Laryngotracheitis in Backyard Chickens: Two Cases.

Infectious laryngotracheitis (ILT) is a contagious viral respiratory disease of great economic importance for the global poultry industry caused by Gallid herpesvirus 1 (GaHV-1). Lesions of the upper digestive tract caused by this virus have not been reported before. Two small flocks of backyard chickens experienced an outbreak of ILT, one in 2006 and the other in 2014. These birds had typical ILT lesions, characterized by a necrohemorrhagic laryngitis and tracheitis but were also affected by a severe erosive and necrotic esophagitis and pharyngitis. On microscopic examination of the esophagus and pharynx, numerous individual epithelial cells were degenerated or necrotic. Syncytial cells were present in the mucosa or sloughed in the overlying inflammatory crust, and some of these cells contained an amphophilic intranuclear viral inclusion. GaHV-1 was detected in tissues, from respiratory and digestive tracts, either by PCR, immunohistochemistry, or both diagnostic assays. This case stresses the importance for veterinarians, owners, and technicians to pay attention to different or atypical clinical manifestations of ILT given its highly contagious nature.

Actinobacillus pleuropneumoniae grows as aggregates in the lung of pigs: is it time to refine our in vitro biofilm assays?

Actinobacillus pleuropneumoniae causes porcine pleuropneumonia and forms biofilms in vitro on abiotic surfaces; however, presence of biofilms during infections has not been documented. The aim of this study was to use a species-specific fluorescent oligonucleotide probe and confocal microscopy to localize A. pleuropneumoniae in the lungs of two naturally infected pigs. Actinobacillus pleuropneumoniae was detected by fluorescence in situ hybridization and observed to grow as aggregates (~30-45 µm) during a natural infection. As the A. pleuropneumoniae aggregates observed in porcine lungs differed from the biofilms grown on a solid surface obtained in vitro, we designed a new biofilm assay using agarose, a porous substrate, favouring the formation of aggregates. In this study, we described for the first time the mode of growth of A. pleuropneumoniae during a natural infection in pigs. We also propose an in vitro biofilm assay for A. pleuropneumoniae using a porous substrate which allows the formation of aggregates. This assay might be more representative of the in vivo situation, at least in terms of the size of the bacterial aggregates and the presence of a porous matrix, and could potentially be used to test the susceptibility of A. pleuropneumoniae aggregates to antibiotics and disinfectants.

Ameliorating Psychosocial Risk Among Mothers with Intellectual Impairment.

The purpose of this study was to pilot a flexible, group-based program designed to strengthen the social connections and enhance the psychological well-being of mothers with intellectual impairment. A multi-site, mixed-method, pretest-posttest design was employed. To obtain rich process and outcome data, the evaluation incorporated measures of psychosocial well-being, goal achievement scaling, and interviews with group facilitators and participants. A total of 18 mothers completed the program. Participation was associated with a meaningful reduction in psychological distress with effect sizes ranging from .57 for depression to .71 for anxiety. Participating in the group program gave the mothers something to look forward to each week, opportunities to learn from and support others, and the feeling of "being a part of society". Further research is needed to determine whether these promising results can be replicated, and to evaluate the long-term impact of the program on mothers and their children.

Laryngeal obstruction caused by lymphoma in an adult dairy cow.

A Holstein cow was presented for inspiratory dyspnea. Endoscopic evaluation revealed swollen arytenoids and a presumptive diagnosis of bilateral arytenoidal chondritis was made. A partial arytenoidectomy was performed, the right arytenoid was submitted for histopathology, and a diagnosis of laryngeal lymphoma was made. Due to the poor prognosis, the cow was euthanized.

Obstruction laryngée causée par un lymphome chez une vache à lait. Une vache Holstein a été présentée pour dyspnée inspiratoire. L'évaluation endoscopique a révélé une enflure des aryténoides. Une hypothèse diagnostique de chondrite des aryténoides a été émise. Une aryténoidectomie partielle a été effectuée. L'aryténoide droit a été soumis pour évaluation histopathologique. Un diagnostic de lymphome laryngé a été émis. Le pronostic d'un lymphome étant sombre, la vache a été euthanasiée.(Traduit par les auteurs).

Postvaccinal reovirus infection with high mortality in breeder chicks.

A broiler breeder flock was subcutaneously vaccinated at the hatchery with a live avian orthoreovirus (ARV) vaccine against viral arthritis. Chicks began to die at 3 days of age and postmortem examination revealed massive subcutaneous hemorrhages and edema on the dorsal aspect of the neck at the site of vaccination, a severe necrotic hepatitis, and pulmonary edema. Microscopically, the main lesion was a multifocal vacuolar degeneration and necrosis of randomly distributed small groups of hepatocytes with presence of apoptotic and multinucleated syncytial cells. Necrotic foci were also found in the lungs as well as a hemorrhagic, granulomatous, and heterophilic cellulitis and myositis of the neck and a generalized depletion and lymphocytolysis of lymphoid organs. At 8 days of age, birds also began to show hock swelling histologically characterized by a fibrinoleucocytic inflammation of the articulation and tendon sheaths, with hyperplasia of the synovial membrane, and lymphoplasmocytic infiltration. PCR and viral culture of livers were positive for ARV. Partial sequencing of the S1 gene from the virus isolate showed 99.2% to 99.8% homology with three vaccinal strains (ARV S1133, 1733, and 2408). Viral particles compatible with reovirus virions were observed at transmission electron microscopy. Investigation at the hatchery revealed that chicks were inadvertently administered an S1133 reovirus vaccine labeled for water administration in 10- to 17-week-old chickens. This human error is most likely the reason for this unusually severe viremic reovirus infection that affected this flock at such an early age.

A cardiac vascular hamartoma in a calf: ultrasonographic and pathologic images.

A right atrial mass was observed by ultrasound in a 3-month-old red Holstein calf. Differential diagnoses included endocarditis or tumor. Due to the poor prognosis, the calf was euthanized. On gross examination, there was a marked dilation of the right atrium. A round, poorly delineated, 2 cm mass was visualized in the right atrium. Microscopic findings were consistent with a vascular hamartoma.

Chronic intestinal pseudo-obstruction in a horse: a case of myenteric ganglionitis.

An 11-year-old Quarter horse mare was presented for recurrent episodes of colic. A chronic intestinal pseudo-obstruction was diagnosed. Medical treatment and surgical resection of the colon were performed but the condition did not improve and the horse was euthanized. Histopathological examination revealed a myenteric ganglionitis of the small intestine and ascending colon.

An eastern equine encephalomyelitis (EEE) outbreak in Quebec in the fall of 2008.

Eastern equine encephalomyelitis (EEE) was diagnosed in 19 horses and a flock of emus in the province of Quebec in fall 2008. The EEE virus caused unusual gross lesions in the central nervous system of one horse. This disease is not usually present in Quebec and the relation between the outbreak and favorable environmental conditions that summer are discussed.

Streptococcus dysgalactiae cellulitis and toxic shock like syndrome in a Brown Swiss cow.

An adult Brown Swiss cow was presented to the Large Animal Hospital of the Centre Hospitalier Universitaire Vétérinaire de l'Université de Montréal due to a postpartum downer cow syndrome. The animal had severe and generalized swelling of all 4 limbs and was in shock, as demonstrated by hypotension, dehydration, hypothermia, altered mental status, and abnormal blood parameters. It died rapidly, and necropsy revealed a generalized, severe cellulitis caused by Streptococcus dysgalactiae subsp. dysgalactiae, bronchopneumonia, and lesions of disseminated intravascular coagulation (DIC) in the kidneys. The portal of entry of the bacteria in the subcutaneous tissue was not found, as there was no history of skin trauma or mastitis. The pure growth of large quantities of an invasive Streptococcus species, associated with hypotension, coagulopathy, and renal failure, are supportive of streptococcal toxic shock-like syndrome in a bovine.

Caprine herpesvirus- 1 abortion storm in a goat herd in Quebec.

Numerous abortions were reported on a Quebec goat farm, and caprine herpesvirus-1 (CapHV-1) was confirmed by PCR in several tissues from 3 aborted fetuses. This is the first report of CapHV-1 in Canada. Practitioners and diagnosticians must consider this disease when making a differential diagnosis for caprine abortion.