|
|
|
| Registros recuperados: 316 | |
|
|
| Ott, Stephen L.. |
| Due to a lack of national information about cull dairy cows, the USDA's National Animal Health Monitoring System (NAHMS) Dairy '96 Study investigated culling management practices. Operations included in the study represented 83.1 percent of U.S. milk cows. Most dairy cows were culled for reasons associated with their inability to profitably produce high-quality milk and calves; reasons for culling were not usually related to ill health or systemic disease. Results showed that almost all cull dairy cows in the US are intended for beef slaughter, as only about 4.4 percent were sent to other dairy operations. Nearly 77 percent of cows intended for beef slaughter were sent to markets, auctions, and sale barns, while 22 percent were sent straight to slaughter... |
| Tipo: Report |
Palavras-chave: NAHMS; Dairy; Cattle; Monitoring; Epidemiology; Production; Economics; Culling; Transportation; Milk; Marketing; Disease; Slaughter condemnation; Livestock Production/Industries. |
| Ano: 1996 |
URL: http://purl.umn.edu/45494 |
| |
|
| |
|
| |
|
| |
|
|
| Ott, Stephen L.. |
| The National Animal Health Monitoring System (NAHMS) Beef '97 Study collected data on the marketing practices of 2,713 beef cow-calf producers representing 85.7% of all beef cows as of January 1, 1997, in 23 leading cow-calf states. Of the operations included in the study, 67.4% sold steer calves, and 52.1% sold heifer calves for slaughter in the year preceding the study. By number of operations, auction was the most common method of selling steers (84.9% of operations) and private treaty was the second most popular marketing method (10.4% of operations). By number of steers sold, private treaty was the most common marketing method. For operations selling either steer or heifer calves, smaller operations were more likely to use auctions as a marketing... |
| Tipo: Report |
Palavras-chave: NAHMS; Beef; Cattle; Cow-calf; Epidemiology; Economics; Marketing; Management; Weaning; Auctions; Income; Forward pricing; Futures contracts; Livestock Production/Industries. |
| Ano: 1998 |
URL: http://purl.umn.edu/32793 |
| |
|
|
| Dargatz, David. |
| As part of the National Animal Health Monitoring System (NAHMS ), USDA:APHIS:Veterinary Services conducted a national study of beef production, the Beef Cow/Calf Health and Productivity Audit (CHAPA). This study was designed to provide both participants and the industry with information on cow/calf health, productivity, and management practices. Data for Part 1: Beef Cow/Calf Herd Management Practices in the United States, were collected from beef producers September 29 through October 9, 1992. The National Agricultural Statistics Service (NASS) collaborated with VS to select a statistically designed producer sample that represented all U.S. cow/calf operations in the 48 continental United States. Eighty-one percent of operations had commercial cattle... |
| Tipo: Report |
Palavras-chave: NAHMS; Epidemiology; Beef cattle; Calves breeding; Artificial insemination; Mortality; Branding; Injections; Castration; Weaning; Livestock Production/Industries. |
| Ano: 1993 |
URL: http://purl.umn.edu/32740 |
| |
|
|
| Dargatz, David. |
| As part of the National Animal Health Monitoring System (NAHMS ), USDA:APHIS:Veterinary Services conducted a national study of beef production, the Beef Cow/Calf Health and Productivity Audit (CHAPA). This study was designed to provide both participants and the industry with information on cow/calf health, productivity, and management practices. The National Agricultural Statistics Service (NASS) collaborated with USDA:APHIS:VS to select a producer sample that was statistically designed to provide inferences about the nation's cow/calf population. Data for Part V: Quality Assurance Profile were collected by federal and state veterinary officers (VMO's) in 18 of the largest cow/calf producing states between January 1 and January 31, 1994. The average... |
| Tipo: Report |
Palavras-chave: NAHMS; Epidemiology; Beef cattle; Calves; Weaning; Value; Economics; Disease; Scours; Calf crop; Mortality; Calving problems; Parasites; Livestock Production/Industries. |
| Ano: 1994 |
URL: http://purl.umn.edu/32767 |
| |
|
|
| Orsini, Nicola; Bellocco, Rino; Bottai, Matteo; Wolk, Alicja; Greenland, Sander. |
| Classification errors, selection bias, and uncontrolled confounders are likely to be present in most epidemiologic studies, but the uncertainty introduced by these types of biases is seldom quantified. The authors present a simple yet easy-to-use Stata command to adjust the relative risk for exposure misclassification, selection bias, and an unmeasured confounder. This command implements both deterministic and probabilistic sensitivity analysis. It allows the user to specify a variety of probability distributions for the bias parameters, which are used to simulate distributions for the bias-adjusted exposure–disease relative risk. We illustrate the command by applying it to a case–control study of occupational resin exposure and lung-cancer deaths. By... |
| Tipo: Article |
Palavras-chave: Episens; Episensi; Sensitivity analysis; Unmeasured confounder; Misclassification; Bias; Epidemiology; Research Methods/ Statistical Methods. |
| Ano: 2008 |
URL: http://purl.umn.edu/120927 |
| |
|
| |
|
|
| Ott, Stephen L.. |
| The National Animal Health Monitoring Systems (NAHMS) Dairy +96 Study of dairy herds in 20 states examined herd management practices that varied between high-producing (top 25%) and low-producing (bottom 25%) U.S. dairy herds. Only 100% Holstein herds were included in the study. Within four size categories (30-99 cows, 100-199 cows, 200-499 cows, 500 or more cows) herds were ranked by milk production per cow. High-producing herds were more likely to use Dairy Herd Improvement Association records or an on-farm computer system than low-producing herds. High-producing herds were also more likely to feed a total mixed ration, use forage test results in balancing feed rations, use bovine somatotropin (bST) and/or systematic prostaglandins, and vaccinate against... |
| Tipo: Report |
Palavras-chave: NAHMS; Dairy; Cattle; Monitoring; Epidemiology; Economics; Holsteins; Production; Diseases; Vaccinations; Culling; Feed; Livestock Production/Industries. |
| Ano: 1997 |
URL: http://purl.umn.edu/32750 |
| |
|
|
| Ott, Stephen L.. |
| In 1995 and 1996, prices for weaned calves were at the lowest point for the current cattle market cycle. The National Animal Health Monitoring System (NAHMS) Beef ,97 Study examined the effects of the down market on beef cow-calf herd management practices. Most producers did not alter management practices in response to the down market. Among producers who made changes, costs were cut largely in the area of herd health management. Specific management practices in which costs were cut included decreases in use of vaccinations (7.4% of operations), herd medications (7.7% of operations), individual cow medications (5.0% of operations), and veterinary services (14.1% of operations). Other ways that producers altered management practices in response to the down... |
| Tipo: Report |
Palavras-chave: NAHMS; Beef; Cattle; Cow-calf; Epidemiology; Economics; Marketing; Management; Vaccinations; Medications; Veterinarians; Culling; Livestock Production/Industries. |
| Ano: 1998 |
URL: http://purl.umn.edu/32794 |
| |
|
| |
|
| |
|
| |
|
|
| Teles,PFS; Boiago,MM; Frigo,A; Rampazzo,L; Araújo,DN; Kich,JD; Rebelatto,R; Furian,TQ; Stefani,LM. |
| ABSTRACT Brazil is the largest exporter of chicken meat and poultry farming is one of the most important productive segments, despite major losses due to the bacterium Escherichia coli, which is also a zoonotic microorganism. The objetive of this study was to isolate E. coli and to evaluate its transmissibility potential from the field to chicken meat using the Pulsed Field Gel Electrophoresis (PFGE) technique. Environmental samples (poultry litter, soil and water) were collected from broiler farms located in the South of Brazil where the majority of the Brazilian poultry production occurs. In addition, chicken meat (gizzard, heart, drumette and tulip) samples were collected from local supermarkets. As results, 47.36% of the samples were positives for E.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Environment; Epidemiology; Microbiology; Public health; Pulsed field gel electrophoresis. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2021000100308 |
| |
|
| |
|
| |
|
|
| Fonseca,BB; Soncini,RA; Vieira,FL; Siqueira,MS; Guimarães,AR; Beletti,ME; Rossi,DA. |
| Campylobacter sp is an important agent that causes foodborne infection, particularly in food of poultry origin. Therefore, the efficient control of the transmission routes in chicken farms is of outmost importance to prevent it from spreading. In chicken farms, the main transmission route of this microorganism is horizontal, as the vertical route continues to be the object of inconclusive researches. The objective of this study was to verify the presence of Campylobacter sp in breeder hens, meconium, and other organs of day-old chicks derived from these breeders in order to obtain information on vertical transmission. Microbiological analyses were performed, using cloacal swabs from 279 breeder hens. Positive breeders were segregated, and the presence of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Campylobacter sp; Chickens; Vertical transmission; Epidemiology. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2006000400010 |
| |
|
|
| MONTALVO-CORRAL,MARICELA; REYES-LEYVA,JULIO; HERNÁNDEZ,JESÚS. |
| Avian influenza viruses produce mainly respiratory and intestinal diseases. Their relevance in the generation of pandemic strains has led to a large amount of research to understand their distribution in nature, as well as the relations that become established for the effective transmission among different hosts. Waterfowl have been recognized as their natural reservoir and they play an important role in the propagation and generation of the diversity of these viruses. The emergence of new influenza viruses with pandemic potential among the human population (H5N1 of avian origin or recombinant H1N1 with avian segments) point our lack of information on many aspects of the ecology and epidemiology of these viruses in their natural hosts to enable the... |
| Tipo: Journal article |
Palavras-chave: Avian influenza; Ecology; Epidemiology; Migratory birds. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2010000400008 |
| |
|
|
| São Germano, Giorgina Graciela Rosolem; Arruda, Vanessa Aparecida; Manhoso, Fábio Fernando Ribeiro. |
| The cat is becoming the most popular pet, especially due to people’s actual life style. This specie possesses peculiarities and requires different maintenance conditions, besides presents different clinical characteristics from other animals. Thus, a feline epidemiologic profile was traced using the medical records from the Veterinary Hospital of the University of Marília, in the period of 2007 to 2009. It was observed that out of the pets attended for, 8.62% were felines, of which 52.47% were female and 47.53% were male. As for breeds, 77.20% had undefined breeds, 14.83% were Siamese and 7.97% were Persians, with age ranging from 45 days to 26 years. The main affections diagnosed were divided in the areas of internal medicine and surgery, and classified... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Epidemiology; Felines; Marília epidemiologia; Felinos; Marília. |
| Ano: 2011 |
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/365 |
| |
| Registros recuperados: 316 | |
|
|
|
