945 resultados para Fisiología veterinaria
Resumo:
A two and a half-year-old female Persian cat was presented with a history of bilateral chronic ocular discharge. Epiphora bilateral mucous ocular discharge and a volume increase in bulbar conjunctiva on the dorsolateral quadrant of the right eye were noticed during routine ophthalmic examination. Ophthalmic examination and the aspiration cytology showed the presence of adipose tissue at the right eye dorsolateral quadrant indicating orbital fat prolapse.
Resumo:
In a machine milking system in which calves were not present, oxytocin concentration (OT), cortisol release (CORT), milk yield and residual milk were evaluated for cows of three genetic groups: 1/2Gir x 1/2Holstein (n=6, genetic group F2), 1/4Gir x 3/4Holstein (n=6, genetic group F3) and Holstein (n=6, genetic group H). Group H had higher milk yield than groups F2 and F3, whereas OT was similar among groups. The increase in OT during milk-ing was greater for H and F3 than for F2. Residual milk for F2 was' higher than for F3 and H. The CORT for F2 was higher than for cows of the other two genetic groups. Cows from F2 and F3 were more stressed than H cows during machine milking, but the Gir x Holstein groups did release suffficient OT to induce an effective milk letdown response.
Resumo:
This research aimed to report the occurrence of subclinical mastitis in a buffalo from a study carried out with 548 milk samples of 137 Murrah and Mediterranean buffalos from seven milk properties, located in the cities of Jau, Botucatu and Sorocaba, State of São Paulo. The animals of the study were submitted to a clinical examination of the mammary gland by the inspection and to the diagnosis of clinical and subclinical mastitis by California Mastitis Test (CMT), being the milk samples later directed to the laboratory for microbiological studies and also to the test of Whiteside Modified (WSM). The isolated agents were identified by the morphological characteristics of its colonies and through microcultive staining with blue cotton. Two (02) pure fungi samples were isolated representing 2.86% of the total isolated microorganism, corresponding to two mammary rooms in one animal, and were classified as pertaining to the Aspergillus fumigatus specie. The animal in question showed reaction of ++ to the CMT in both affected rooms and negative reaction to the WSM. In this way it is concluded that the Aspergillus fumigatus participates in a discrete way as a determinant agent of bubaline subclinical mastitis, however it is important because the affected animals can act as potential reservoirs and may be able to generate the infection in human beings.
Resumo:
This paper reports the detection of bovine herpesvirus type 5 (BoHV-5) by a specific nested PCR assay. Samples were collected from the central nervous system (CNS) of cattle from Minas Gerais and São Paulo States, Brazil. All animals died presenting neurological symptoms. Nineteen frozen CNS samples analyzed had been previously tested by fluorescence antibody test for rabies virus and showed negative results. Three paraffin-embedded brain tissue samples were examined by histopatology and the observed alterations suggested nonsuppurative meningoencephalitis. BoHV-5 was detected in five (22.7%) among 22 tested samples. The occurrence of BoHV-5 infection is reported in the Southeast region of Brazil, indicating that epidemiological studies should be carried out.
Resumo:
Newborn Holstein-Friesian and Nelore cattle and Murrah buffalo blood samples were collected for hemograma and serum constituents testing. Results indicated that: 1. buffalo red blood cell (RBC) counts were lower than RBC counts for cattle during the first 30 days after birth; 2. buffalo leukocytes, neutrophil and lymphocyte counts increased in older animals; 3. The highest fibrinogen levels occurred in older calves; 4. buffalo glucose levels were lower than Nelore cattle and decreased in the older calves; 5. buffalo iron, urea, and aspartate aminotransferase levels were higher than in cattle with the highest concentration at the time of birth; 6. cattle bilirubin and alanine aminotranferase levels were higher than buffalo with the highest value at the time of birth; 7. alkaline phosphatase and gammaglutamyltransferase activities were lower in the older calves; 8. buffalo magnesium levels were higher than cattle with lower concentrations at the time of birth..
Resumo:
Blood constituents of Nelore, Hosltein and buffalo cows were determined during pregnancy, at the time of calving and at post-partum. It was verified that. 1. The pregnancy and post-partum periods had no influence in the erythrocyte values, but at calving the red blood cell counts and hemoglobin levels of Holstein and buffalo cows were lower than for Nelore cattle; 2. leukocyte counts were similar among groups; 3. total protein levels of Nelore cows were lower than Holstein and buffalo. The albumin levels were rite lowest at rite time of calving compared to late pregnancy; 4. glicose levels were lower ill buffalo cows during pregnancy as compared with Holstein cows. The glicemia of Nelore cows was lower as compared to Holstein cow's irt late pregnancy; 5. urea and creatinine levels were higher in buffalo cows than cattle. The urea and creatinine levels were greater in buffalo cows with maximum values at the post-partum and at the parturition, respectively; 6. bilirrubin levels were higher in bovine than buffalo cows; 7. aspartate aminotransferase activity was greater in buffalo cows and increased at the time of calving; 8. alkaline phosphatase activity was increased during pregnancy and decreased after the time of calving; 9. gammnglutamyltransferase activity,vas the highest for buffalo cows after calving; IO. calcium levels were the highest for Holstein cows at the post-partum and the phosphorus levels were higher in buffalo cows, which had the highest magnesium levels at the parturation.
Resumo:
One hundred forty seven cycles of mares were allocated in a completely randomized experiment, with different number of replications and divided in four treatments (T1 = 24 hours preovulation; T2 = 48 hours preovulation; T3 = 48 hours preovulation and in tbe same day of ovulation; T4 = 72 hours preovulation and in the same day of ovulation), in order to study the effect of AI/ovulation interval on mare fertility. The mares were inseminated three times for wek (monday, wednesday and friday), with semen of only one stallion diluted in extender skim milk-glucose, using a volume of 15ml, with 400 x 10(6) sptz viable, cooled at 14 degrees C/3.6 hours, and transported in modified container Celle. Conception rates were not different according to the treatments. So, observed spermatic survival for 60 hours showed the practicability of the inseminations on monday, wednesday and friday.