RESUMOO presente trabalho teve por objetivo desenvolver um modelo bioeconômico para determinação de ponderadores econômicos utilizados em índices de seleção em programas de melhoramento genético de bovinos de corte. Foi desenvolvido um cenário padrão, onde, em termos absolutos, as características de maior relevância econômica foram o rendimento de carcaça, as características ligadas à fertilidade do rebanho, seguidas pelas características de peso e ganho de peso e por último as referentes à mortalidade. Os valores genético-econômicos obtidos foram, para habilidade de permanência (HP) 0,879; para probabilidade de prenhes ao 14 meses de idade (PP14) 0,201; para ganho de peso pós-desmama (GPD245) 0,190; para peso a desmama (PD) 0,061; e 0,080 para peso ao sobreano (PS). Portanto, verificou-se que as características reprodutivas, HP e PP14, foram de 4,28 a 13,46 vezes mais importantes economicamente do que as características de crescimento GPD245, PD e PS. SUMMARYAiming to increase the economical studies applied to animal genetic improvement, the present work had as goal to develop a bio-economical model to determine the economical weights utilized on indexes of selection in genetic improvement programs in beef cattle. A standard scenario was developed where, in absolute terms, the traits with major economical relevance were respectively, carcass yield, traits related to herd fertility, followed by those related to weight and weight gain, and last, referred to mortality. The geneticeconomical values obtained were 0.897 for stayability, 0.201 for heifer pregnancy at 14 months (PP14), 0.190 for pos-weaning weight/kg/day, 0.061 for weaning weight and 0.080 for steer weight at 18 mo. Therefore, it was verified that the reproductive traits, stayability and PP14, were 4.28 and 13.46 times economically more important than the growth traits, pos-weaning weight, weaning weight and steer weight at 18 months. INTRODUÇÃOToda atividade produtiva deve ter por premissa básica a busca por resultados eficientes em termos produtivos e, sobretudo em termos econômicos.Nesse sentido, a gestão da propriedade rural tem apresentado relevante importância, sendo que o aumento da eficiência da pecuária de corte no Brasil, passa necessariamente pela melhoria da qualidade genéti-ca dos rebanhos, que pode ser obtida, principalmente, pela escolha dos indivíduos que serão os pais da geração seguinte e

RESUMO: Objetivou-se identificar os padrões de consumo da carne bovina comparada ao consumo de carnes de frango, suíno, pescado e ovina. Os dados foram coletados por meio de questionários, junto à população da cidade de Campo Grande, MS, Brasil. Foram incluídos fatores sociais, educacionais, econômicos e específicos do consumo da carne bovina em relação à ordem de consumo, atributos da carne e preferência para o consumo. A pesquisa foi realizada com 429 consumidores, abordados na entrada de supermercados. Notou-se relevante preocupação dos consumidores com atributos relacionados à higiene, cor, aroma e maciez. Quanto ao teor nutricional, 41,03% dos consumidores acreditam que a carne bovina é a mais nutritiva dentre as carnes. A frequência do consumo de carne pelos indivíduos mostrou que 45,92% tem o hábito de consumir carne bovina diariamente. Em ordem de consumo, a carne bovina foi escolhida como primeira opção com 80,65% das respostas, seguida de frango, suíno, pescado e ovina. Quando desconsiderado o preço das carnes, observou-se mudança nas respostas, havendo aumento na preferência pelo consumo de carne de pescado, porém, ainda assim a carne bovina foi escolhida como primeira opção.Palavras-chave: consumidor, alimentação, hábitos alimentares. STUDY OF THE BEEF CONSUMPTION PATTERN IN THE CITY OF CAMPO GRANDE, MS, BRAZILABSTRACT: The objective of this study was to identify beef consumption patterns compared to the consumption of chicken meat, pork, fish and lamb. The data were collected by questionnaire applied to the population of Campo Grande, Mato Grosso do Sul, Brazil. Social, educational, economic and specific factors of beef consumption in relation to the order of consumption, meat attributes and consumer preference were included. The study was conducted on 429 consumers interviewed at the entrance of supermarkets. Important concern of consumers regarding attributes related to hygiene, color, flavor and tenderness was noted. With respect to nutritional value, 41.03% of consumers believe that beef is more nutritious than other meats. Analysis of the frequency of meat consumption showed that 45.92% of the subjects have the habit to eat beef daily. Regarding the order of consumption, beef was reported as the first option (80.65% of the responses), followed by chicken meat, pork, fish and lamb. A change in the responses was observed when the price of meat was disregarded, with an increase in the preference for fish consumption, although beef was still chosen as the first option.

This study aimed to review cases of blackleg (Clostridium chauvoei infection) diagnosed in cattle from Midwestern Brazil from 1994 to 2014 considering epidemiological, clinical, necropsy and histopathological findings. Also the following laboratory tests were used for the diagnosis of some cases of blackleg: microbiological culture and identification of the agent, microbiological culture and identification of the agent by the polymerase chain reaction (PCR), and identification of the agent in formalin fixed paraffin embedded tissues (FFPE). Criteria for presumptive diagnosis of blackleg included necrohemorrhagic emphysematous myositis consisting of inflammatory infiltrate, coagulative necrosis of myofiber, interstitial edema, hemorrhage, and gas bubbles between myofibers. Fifty nine cases from 51 outbreaks of blackleg were found, which corresponded to 1.1% of 5,375 cattle deaths investigated. In five of those outbreaks, samples of affected muscles cultures for the identification of pathogenic clostridia were made. Another three samples of similar material were cultured for clostridia with subsequent identification of the isolate by PCR. Twelve samples of FFPE affected muscle fragments were submitted to PCR for identification of the etiological agent. Except for January, cases were observed in each month of the year, with higher numbers in July-October. Most affected cattle were in the age of 7-12 years, but calves younger than 6 month-old and older than 24 months were also observed. Vaccination histories were scarce. In 32 outbreaks some vaccination history was available, but only in two of those vaccination has been carried out properly. In 56 six cases the skeletal muscles were involved. Muscles of the hind limbs were the most affected. In ten cases muscles of the tongue, myocardium and diaphragm were also affected. In three of the cases the visceral form was observed. Deaths occurred after a clinical course of 6-24 hours, but in most cases cattle were found death. Sudden death was the outcome in visceral cases (cardiac) blackleg. Clostridium chauvoei was confirmed to be the cause by culturing in 5 cases, and by PCR and histopatology in 8 cases. Bacterial culture followed by PCR did not demonstrate C. chauvoei. Calculation of the economic impact indicates that blackleg is a frequent disease in the state of Mato Grosso do Sul (MS) that inflicts significant economic loss. The amount of these losses would be reduced through proper vaccination programs against the prevalent strains of C. chauvoei in the region.

Pesq. Vet. Bras. 34(8) Lesions caused by excessive reaction to foot and mouth vaccine were observed in 1,815 out of 5,000 cattle slaughtered in a slaughterhouse under federal meat inspection. Such lesions resulted in condemnation of the affect parts of the carcasses in accordance with the Brazilian Federal Meat Inspection Regulations. The affected cattle had been vaccinated on May 2012 and then slaughtered in September of the same year. They were allotted to two groups with 1,500 (Groups 1) and 315 cattle (Group 2). Post vaccination lesions were characterized as salient, firm variable sized nodules multifocally distributed in the musculature of the lateral neck. Pus oozed at the cut surface of these nodules. Samples of 28 cattle were submitted for histopathological examination; main findings were pyogranulomas with central variable-sized clear spaces surrounded by marked infiltrate of viable and dead neutrophils, which were surrounded by epithelioid macrophages with vacuolated cytoplasm and occasional multinucleated giant cell. This inflammatory reaction was walled by abundant connective tissue infiltrated by lymphocytes and plasma cells. Samples of the lesion of six cattle were submitted to bacteriological culture with negative results. When affected carcasses went through dressing, there was an average of 1.8 and 2.0 kg of muscle tissue cut off from the carcasses respectively of Group 1 and 2. Economic losses in the farm of origin of the affected cattle was R$ 20,424.00, considering the price paid by kg of cattle for slaughter at the time of the occurrence. This amount at that time was enough to buy 29.17 weaned calves for fattening. If one considers theses 5,000 cattle vaccinated on the farm as the population at risk, the morbidity rate would be 0.36%. These results indicate that the losses due to vaccine reaction, even with no overt clinical signs, may cause important economic losses.

The cattle tick Rhipicephalus microplus causes significant economic losses to cattle production systems and is a main barrier to the introduction of Bos taurus breeds and their crosses in Brazil. These breeds have the genetic potential to generate animals that are more productive, but they are also more susceptible to R. microplus. One of the alternatives for conventional tick control is the use of strategic control, aiming at delaying or even preventing the development of its resistance to acaricides. The present study aimed to evaluate the economic losses caused by tick infestation on the productive performance of two breeds of beef cattle and to evaluate the economic efficiency of tick strategic control and its impacts on beef cattle production systems. Animal weights were obtained from the literature and were used to calculate the weight loss in kilograms (kg) and the economic loss (US$) caused by R. microplus infestation. The cost/loss ratio of performing strategic control was also calculated. The data show that tick infestation causes economic losses to the breeds and groups of animals evaluated and reduces animal performance (weight loss). The results show a loss of US$34.61/animal in the backgrounding phase and US$7.97/animal in the finishing phase for Brangus animals and its crosses. In conclusion, the data show that strategic control is economically efficient for Brangus animals in the backgrounding phase, independent of the methods used for acaricide application.

Resumo: A ingestão crônica de braquiária induz lesões hepáticas em bovinos caracterizadas por fibrose, atrofia do lobo esquerdo, hipertrofia compensatória do lobo direito e proliferação de ductos biliares. Tipicamente, essas lesões são associadas com agregados de macrófagos espumosos no parênquima hepático. Nesse trabalho foram estudados fígados com essas lesões num abatedouro frigorífico do Brasil Central e as perdas econômicas causadas pela condenação de tais fígados afetados foram estimadas. Durante o período estudado, 488.476 bovinos foram abatidos nesse matadouro frigorífico, dos quais 5.295 fígados foram condenados devido à fibrose, e 192 com lesão hepática foram estudados. Cálculos econômicos permitiram inferir que essas condenações representaram uma perda de R$ 108.817,60. Conclui-se que a condenação de fígados em razão de fibrose induzida pela ingestão de braquiária causa uma perda significativa para a indústria de carne e produtos bovinos devido à condenação de 23,6 toneladas de fígado em um ano em apenas um frigorífico, com perdas estimadas acima de R$ 100.000,00.

Estimaram-se os valores econômicos para as características reprodutivas de probabilidade de prenhez aos 14 meses (PP14) e habilidade de permanência (HP). Foram simulados dados de uma propriedade pecuária de corte, especializada na fase de cria para aplicação de modelagem bioeconômica. A PP14 foi avaliada considerando taxas percentuais crescentes de prenhez de novilhas aos 14 meses de idade, e a HP foi avaliada a partir da diminuição da taxa de descarte de vacas. O valor econômico da PP14 foi estimado em R$695,97 por unidade percentual de prenhez de novilhas aos 14 meses, avaliada para o sistema produtivo, enquanto o valor econômico da HP variou em função do custo de compra da novilha de reposição. Os valores, avaliados por unidade percentual de diminuição na taxa de descarte de vacas, foram de R$-2.140,00, R$-140,00 e R$2.860,00 para o custo de compra da novilha de R$500,00, R$700,00 e R$1.000,00, respectivamente. Os valores econômicos negativos para HP indicaram que o valor de descarte da vaca superou o custo de compra da novilha. Quanto maior for o valor investido na reposição de novilhas maior será a importância econômica do HP.

RESUMO.-[Raiva em bovinos: perdas econômicas e sua mitigação através da vacinação antirrábica.] A raiva é uma das doenças neurológicas mais comuns em bovinos no Brasil, causando perdas econômicas significativas. Dados sobre o impacto econômico da raiva em bovinos de vários países estão disponíveis. No entanto, no Brasil, esses dados enfocam principalmente o ponto de vista de saúde pública, enfatizando os custos relacionados à prevenção da raiva em humanos, em cães ou animais silvestres. Estudos pontuais realizados em diferentes regiões do Brasil indicam perdas econômicas importantes causadas pela raiva em bovinos no país. No entanto, os estudos sobre as perdas causadas pela doença em bovinos carecem de uma análise detalhada das propriedades rurais afetadas com base em dados das agências oficiais de controle de doenças. O objetivo deste trabalho foi avaliar o impacto econômico da raiva bovina e sua mitigação através da vacinação antirrábica em propriedades rurais de Mato Grosso do Sul, no Centro-Oeste do Brasil.