Paulo Marcos Ferreira

Parâmetros fisiológicos de bovinos cruzados submetidos ao estresse calórico

The thermoregulation physiological responses in thermoneutrality and heat stress of crossbred calves (½Gir x ½Holstein), males and females, with age between 14 and 20 months were studied. The animals were submitted to thermoneutrality (22°C and 70% of relative humidity) and to heat stress (42oC and 60% of relative humidity) in summer and winter seasons in bioclimatic chamber. Rectal temperature (TR), respiratory rate (FR) and body surface temperature (BST) were registered at 6 AM and 4 PM. It was observed increase in TR, FR and BST in the heat stress period (P 0.05) was observed for BST.

Mastite subclínica e relação da contagem de células somáticas com número de lactações, produção e composição química do leite em vacas da raça Holandesa

The subclinical mastitis occurrence and the relationship between somatic cell count (SCC) with parity, milk yield and milk chemical composition, were studied in Holstein cows. The study was carried out in farms belonging to the milk control program of the Associacao de Criadores de Gado Holandes de Minas Gerais. Data on lactation order, subclinical mastitis, SCC, milk production, fat contents and total protein contents were analyzed. There was a negative correlation between SCC and milk production and, correlations between SCC and percentage of fat and protein were positive. Higher lactation order cows showed higher SCC, and cows with SCC higher than 100,000 cels/ml showed less milk production.

Prevalência e classificação das afecções podais em vacas lactantes na bacia leiteira de Belo Horizonte

The prevalence and classification of clinical foot problems of 469 lactating dairy cows were studied in 10 farms in the dairy region of Belo Horizonte, Brazil, managed in confinement systems. A total of 142 cows were considered affected and presented 534 lesions. The prevalence of affected cows was 30.3%, being 66.7% in the hind feet and 33.3% in the fore feet, with no difference between outer claw (49.2%) and inner claw (50.7%). The classification according to lameness showed, 105 animals classified as score 1, 9 as score 2, 15 as score 3, 7 as score 4 and 6 as score 5. Age of cow influenced the prevalence of lesions, but no effect of lactation stage was observed. The most frequent lesion was horn erosion representing 48.5% of the total, followed by interdigital dermatitis (13.5%) and septic pododermatitis (9.6%).

Custo e resultados do tratamento de seqüelas de laminite bovina: relato de 112 casos em vacas em lactação no sistema free-stall

The results and costs of treatments of feet sequelae of subclinic dairy cattle laminitis were described in 112 cases of lameness in lactating cows maintained in free stall system. The analyses were performed in an one-year-period using 2.5 to 10 year-old, first to sixth parity cows. Average milk yield was 8,000±2,000kg. The treatment protocol was described in details for each digit lesion and it was very successful to reverse all kinds of lesions. The total treatment cost for the herd was US

Meningoencefalite por Herpesvirus bovino 5 em Minas Gerais: relato de caso clínico

5,005.23 and the mean cost/animal was US

Perdas econômicas ocasionadas pelas enfermidades podais em vacas leiteiras confinadas em sistema free stall

44.68. The ulcer treatments were costly (US

Dinâmica da infecção natural por Eimeria spp. em cordeiros da raça Santa Inês criados em sistema semi-intensivo no Norte de Minas Gerais

72.58) and longer (26.8 days). Sole and heel abscesses and white line disease at the foe (64/112 or 57.2%) were most commonly observed.

Degradabilidade in situ da silagem de quatro genótipos de sorgo com e sem tanino: II - Fibra detergente neutro, fibra detergente ácido, hemicelulose e celulose

A clinical case of meningoencephalitis by Bovine herpesvirus 5 (BoHV-5) in a five-year-old cow was reported. The disease began with low spinal cord signs, characterized by incoordination, and these symptoms had never been related to this illness before. Signs of a brain syndrome were observed and the cow died in six days. At the histopathology, a spread non-supurative meningoencephalitis was diagnosed, and the virus identification was made by PCR and partial sequence of the glycoprotein G. This study confirm the BoHV-5 presence in the State of Minas Gerais, Brazil, describes new clinic characteristics, and show the importance of the disease in the differentiate diagnosis with others bovine central nervous system affections.

Degradabilidade in situ da silagem de quatro genótipos de sorgo com e sem tanino: I - Matéria seca e proteína bruta

Fifty-five clinical cases of lameness were evaluated in 100 lactating cows housed in a free-stall system during one year. The most observed affections were sole and heel abscesses, sole ulcers and digital dermatitis that accounted for 87.3% (48/55) of the occurrences. The treated cows showed satisfactory recovery (24.5 average days) without culling. The total individual cost including treatment and reduction of milk production was US

Quadro clínico do envenenamento crotálico experimental em bovinos (Crotalus durissus terrificus - crotamina positivo)

95.80/cow or US