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Results for “SWINE DISEASES”

Search indexed PubMed citations on genomics, clinical trials, systematic reviews and public health. Explore titles, authors and supplied subject terms, then open the PubMed record.

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At least 865 records · Page 48Linked to original sources
PubMed1985

Art, science and mathematics: new approaches to animal health problems in the agricultural industry.

This article is about change; particularly the prospect for change in veterinary research during the last decade and a half of the 20th century. The title encapsulates the idea that veterinary medicine, if it is to be effective, periodically has to change its approach to solving animal health problems; that over the last century we have witnessed one major change, that from veterinary medicine as an art to veterinary medicine as a science, and that we are probably on the brink of another change, moving from a scientific or more correctly an experimental approach to a mathematical or observational approach.

Agriculture↗
PubMed1986

Carcase damage.

Explore the source record for details and available documents.

Abscess↗
PubMed1986

The ecology of Escherichia coli in animals including man with particular reference to drug resistance.

The phenomenon of drug resistance among bacteria, particularly Escherichia coli, has been a major research interest of the University of Bristol's departments of microbiology and veterinary medicine during the past 15 years. Tens of thousands of E coli isolates from man and farm animals have been examined in studies of both the ecology of the species and the epidemiology of their resistance to therapeutic antibacterial agents. The principal findings obtained in these investigations are described.

Animals↗
PubMed1988

Serological diagnosis of the porcine proliferative enteropathies: implications for aetiology and epidemiology.

Campylobacter mucosalis and C hyointestinalis have been associated with the proliferative enteropathies of pigs. An examination of the antibody response to these organisms and to the intracellular campylobacter-like organism was undertaken. Antibody to the campylobacter-like organism was predominantly IgM, short lived, and could be detected by an immunofluorescence test using bacteria released from lesions as antigen. The majority (75 per cent) of pigs with proliferative enteropathy at necropsy were antibody positive and a small number (4 per cent) of pigs in which lesions were not observed were found to have antibody. Antibody appeared to be correlated with the presence of lesions rather than with exposure to infection and was independent of the presence of antibody to C mucosalis or C hyointestinalis. In natural outbreaks of the disease antibody to the campylobacter-like organism was more prevalent than clinical signs in the affected animals.

Agglutination Tests↗
PubMed1992

Porcine reproductive and respiratory syndrome (PRRS or blue-eared pig disease).

This paper sets out to provide a summary of the salient facts about the porcine reproductive and respiratory syndrome and to identify conclusions. It draws on the proceedings of a BVA Trust symposium held on Friday November 1, 1991, which was attended by representatives of the state veterinary services of Belgium, Germany, the Netherlands and the UK together with veterinarians involved in pig research and practice.

Animals↗
PubMed1993

Escherichia coli isolated from farm animals in England and Wales between 1986 and 1991.

Escherichia coli isolated from farm animals in England and Wales between 1986 and 1991 were examined for their serogroup, fimbrial adhesin and toxin production, and resistance to antimicrobial drugs. Among the 3595 porcine isolates the more common serogroups were O149, O8, O138, O147 and O157. The F4(K88) adhesin was detected in 21 per cent of the cultures, whereas the other adhesins were never present in more than 3 per cent during any year, although there was an upward trend in the prevalence of the F6(987P) antigen. The heat labile enterotoxin was produced by more than 17 per cent of the cultures usually in association with the F4 antigen. The other toxins, heat stable (STa), verocytotoxin (VT) and cytotoxic necrotising factor (CNF) were produced by 5.3, 4.7 and 6.8 per cent of the cultures, respectively. Among the 1383 bovine cultures the more common serogroups were O8, O101 and O17. The F5(K99) adhesin was detected in 9.1 per cent of the cultures, usually in association with STa production. The toxins STa, VT and CNF were produced by 4.4, 2.8 and 8.3 per cent of the cultures, respectively. Among the 407 ovine isolates the more common serogroups were O8, O101 and O78, and 11 per cent of the cultures produced the F5(K99) antigen. The toxins STa, VT and CNF were produced by 1.5, 6.1 and 9.1 per cent of the cultures, respectively. In the case of the 402 poultry isolates the more common serogroups were O78, O2 and O8, which are usually associated with colisepticaemia. Resistance to antibiotics was common, particularly among the bovine isolates.

Animals↗
PubMed1994

Immune response and persistence of the porcine reproductive and respiratory syndrome virus in infected pigs and farm units.

The kinetics of the serum antibody response to porcine reproductive and respiratory syndrome (PRRS) virus and the persistence of the virus after infection were determined in experimentally and naturally infected pigs. In an experimental study, four specific pathogen free (SPF) sows were infected with a French strain of PRRS virus at 90 days of gestation, and their piglets (the test piglets) were monitored for 29 weeks from birth. In one litter, antibodies against PRRS virus were absent before the piglets had ingested colostrum. Four days after birth, passive antibodies were present in the serum of these piglets, but they had disappeared by three weeks (just before weaning) when clinical signs were observed in a minority of the pigs. In a second litter, most of the piglets had no detectable antibodies until they were four weeks old, and clinical signs were observed during their second week of life. By eight weeks, antibodies were detected in all the pigs, and they persisted until observations ceased at 29 weeks. Two groups of three SPF pigs were placed in direct contact with the test piglets when they were four weeks old and a group of five SPF pigs was placed in indirect contact when they were 13 weeks old. The first two groups showed clinical signs and seroconverted but the third group did not. At 22 weeks old, two of the test piglets were subjected to movement stress and were given exogenous corticosteroids, after which the in-contact SPF pigs developed clinical signs and seroconverted.(ABSTRACT TRUNCATED AT 250 WORDS)

Animals↗
PubMed1994

Prevention of the spread of porcine reproductive and respiratory syndrome virus in endemically infected pig herds by nursery depopulation.

An attempt was made to prevent the spread of the virus of porcine reproductive and respiratory syndrome (PRRS) on three Minnesota pig farms that had been experiencing chronic nursing pig problems, including poor growth rates and increased mortality of post weaning pigs. The PRRS virus and different bacterial pathogens were isolated from all three farms during the initial investigation, and all the farms had a high prevalence of PRRS virus-seronegative breeding animals. All the pigs tested within one week after weaning when they were 18 to 22 days old, were seronegative, whereas 80 to 100 per cent of the pigs tested at eight to nine weeks had antibody titres ranging from 1:64 to 1:1024 by an indirect fluorescent antibody method. The seroprevalence among the finishing pigs on the three farms ranged from 25 to 50 per cent. An eradication protocol was established on each farm, involving emptying the nurseries, followed by pumping out the slurry pits and cleaning, washing and disinfecting three times in 14 days. After the nurseries were repopulated there were improvements in nursery mortality and average daily weight gain, and no seropositive animals were detected in the nurseries on any of the farms; the seronegative status was maintained for the six-month testing period.

Animal Husbandry↗