Suchergebnisse

The effects of managerial systems on the occurrence of gastrointestinal helminths in Free-Range Chickens (FRCs) from northern Paraná, Brazil were investigated. The most predominant (23.3%; 61/262) cestode observed was Raillietina cesticillus; Heterakis gallinarum (71.4%; 187/262) and Ascaridia galli (45%; 118/262) were the predominant nematodes; Postharmostomum commutatum was the only trematode observed in 2.7% (7/262) of FRCs. The most elevated parasitic burdens were associated with Heterakis gallinarum, Ascaridia galli, and Raillietina cesticillus. Significant (p ? 0.05) associations were observed when the effects of the types of bedding, soil type, and fence restriction of FRCs were considered relative to the possibility of helminthiasis. The type of bedding, the length of the sanitary break, and the presence of shading significantly (p ? 0.05) influenced the possibility of FRCs being infected by H. gallinarum. Most parameters evaluated were significantly associated with infection of FRCs by A. galli. These findings suggest that FRCs from northern Paraná are infected by a wide-range of gastrointestinal helminths, but more frequently by R. cesticillus, H. gallinarum, and A. galli. Moreover, the type of floor bedding, the soil type, and the usage of fences in the management of FRCs is directly related to gastrointestinal helminthiasis.

Considering the high prevalence of subclinical mastitis and its impacts on milk production, thematic studies are needed and can provide strategic data for its control. This study aimed at investigating the most frequent microorganisms associated with subclinical mastitis in dairy cows in the northwest State of Paraná, Brazil and its sensitivity to antibiotics. A total of 478 foremilk samples were tested. Streptococci were the most frequently genus observed (63%), followed by staphylococci (31%). Streptococcus mutans, S. sanguis, and S. uberis were the most frequently identified species. For Streptococcus spp., the antimicrobial resistance was higher for Ceftiofur, whereas for Staphylococcus spp. it was also possible to verify a high occurrence of resistance for Gentamicin + Amoxicillin. Our results strengthen the knowledge of the microbiological agent and antibiotic-resistance patterns of pathogens at regional level, targeting future strategies to reduce the environmental spread of pathogenic strains resistant to antibiotics.

The spleen of dogs is frequently affected by disorders that vary from local and systemic origin. The difficulty in associating clinical and gross findings contributes for the choice of total splenectomy as the main treatment, leading to an impairment of the immune and hematopoietic functions. The aim of this study was to evaluate the pathological findings in the spleen of splenectomized dogs during 2008 to 2014 at a Veterinary Teaching Hospital. From the 71 cases analyzed, 97% (69/71) of the dogs were submitted to total splenectomy and 3% (2/71) to partial splenectomy. In 45 (63.4%) of these cases, the histopathological diagnosis was non-neoplastic alterations; only 36.6% (26/71) had a splenic neoplasia. The main non-neoplastic lesions observed were nodular hyperplasia 24.4% (11/45), infarction 22.3% (10/45), and hematoma 20% (9/45). The most frequent tumors were hemangiosarcoma 50% (13/26), histiocytic sarcoma 23% (6/26), and lymphoma 11.5% (3/26). The clinical methods used to diagnose splenic lesions were ultrasonography 88% (63/71), radiography 2.8% (2/71) and exploratory laparotomy 4.2% (3/71). In 4.2% (3/71) the spleen changes were observed during the therapeutic ovariohysterectomy. The results of the present study showed a prevalence of benign disorders in the spleen of splenectomized dogs associated with a high incidence of total splenectomy performed, indicating a difficulty in recognizing the different lesions that can affect the spleen by the veterinarian medical.

Necrotizing leukoencephalitis (NLE) is an uncommon inflammatory condition of brain of dogs, and was described in dogs from North America, Europe, and Asia. Cases of NLE from South America were not located when major data bases were examined. Consequently, this report describes the findings associated with NLE in a Brazilian 3.5-year-old female Yorkshire dog with neurological findings related to the myelencephalon; the dog died, besides medical treatment, and was submitted for autopsy exam and histopathological evaluation. Lesions were restricted to the encephalon and characterized as leukoencephalomalacia with severe non-suppurative inflammation with extensive perivascular cuffing; the non-suppurative inflammation was characterized by influx of lymphocytes and histiocytes, and occasionally plasma cells, and gitter cells. Infectious disease agents were not identified by molecular techniques or visualized with histochemical stains. This report represents the first definitive diagnose of NLE in Brazil, suggesting that this disease may be present in South America dogs suffering from neurological conditions. This knowledge may be useful for veterinarians in Brazil, taking into account that this disease should be considered as a differential diagnosis when infectious causes are excluded.

A male miniature Schnauzer with cryptorchidism and a mass growth in the right inguinal canal was admitted to the clinical center of a veterinary hospital. During surgical resection of the mass, tubular formations were found, connecting the mass to the left testicle. Histopathology revealed that the tubular formations were uterine tubes and the mass was a seminoma associated with a sertolioma of the right testicle. Further analysis also showed atrophy of the left testicle. Cytogenetic evaluation revealed normal chromosomes of male gender, 78, XY, which led to the conclusion that this was a male pseudohermaphrodite.