Gene/Protein Disease Symptom Drug Enzyme Compound
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During the period 1973 to 1979 the number of recorded incidents of equine salmonellosis increased from 23 in 1973 to a peak of 111 incidents in 1976, but has since decreased to 32 in 1979. Of the 416 incidents recorded during the period of the survey 292 were caused by Salmonella typhimurium and 121 by 33 different serotypes; in three instances rough strains of salmonella were involved. The number of incidents caused by serotypes other than S typhimurium increased from one in 1973 to 32 in 1976. The number of different salmonella serotypes increased from two in 1973 to 23 in 1977 and has subsequently declined. Drug resistance monitoring of salmonella strains from horses showed that most of the strains were resistant to streptomycin and sulphonamides, although resistance to other antibacterial drugs used was low. Seventeen different patterns of antibiotic resistance were observed but resistance to more than two antibiotics was uncommon.
Vet Rec 1981 Oct 31
PMID:Salmonella infection in horses in England and Wales, 1973 to 1979. 704 8

Twenty-six incidents of salmonellosis occurring in Scotland between 1973 and 1979 and attributed to environmental pollution are reviewed. The apparent sources of pollution were sewage effluent (10 incidents), septic tank effluent (eight), sewage sludge (three), seagulls (three) and abattoir effluents (two). Cattle were the species predominantly affected. Human infection was primary in three incidents and was secondary to bovine infection in another four. Thirteen salmonella serotypes were recovered from infected humans or animals and 17 during related environmental investigations. The factors causing pollutions and possible control measures are discussed.
Vet Rec 1981 Jun 27
PMID:Human and animal salmonellosis in Scotland associated with environmental contamination, 1973-79. 730 37

Many diseases of farm animals, particularly salmonellosis, may be disseminated by slurry. Salmonellas may be found in low numbers (less than 100 per gram) in slurries but 90 per cent die during the first two to four weeks when the material is stored and survive on grass for short periods only. Animals experimentally allowed to graze pasture spread with slurry are not easily infected. The danger of disseminating salmonellosis by by the use of a slurry system can be significantly reduced if the slurry is stored for at least one month before spreading on pasture and if pasture treated with stored slurry is not grazed for a similar period after spreading.
Vet Rec 1980 Jan 05
PMID:Health hazards associated with the handling of animal wastes. 735 57

A total of 2585 serum samples from 62 dairy herds located in four different regions of Denmark were tested in an O-antigen (0:1,4,5,12)-based ELISA for the detection of antibodies against Salmonella typhimurium. Ten closed herds from an island with no reported occurrence of salmonellosis for several years, and 12 herds from a salmonella enzootic area which had had clinical outbreaks of S typhimurium were used to define a herd ELISA cut-off value. When herds with at least 5 per cent of the serum samples having an optical density of > 0.5 were considered ELISA-positive, all 10 herds from the salmonellosis-free island were ELISA-negative, and all but one of the 12 S typhimurium-infected herds were ELISA-positive, which resulted in a herd test sensitivity of 0.92 and herd test specificity of 1.0. Eleven of the 12 S typhimurium-infected herds were negative in a blocking ELISA based on a monoclonal antibody to the 0:9 antigen of the serogroup D salmonellas, indicating the possibility of rapid serogroup-specific screening of herds by means of these two tests. Ten other randomly selected herds with clinical outbreaks of S dublin were all, to a large extent, positive in the 0:1,4,5,12-ELISA, whereas a S dublin (0:1,9,12)-ELISA described previously appeared to be more serogroup D-specific. Thus, the 0:1,4,5,12-ELISA appears to be useful for detecting herd infections with S typhimurium, and positive reactions may be further discriminated by the serogroup D-specific ELISA.
Vet Rec 1995 Oct 07
PMID:Evaluation of an O-antigen ELISA for screening cattle herds for Salmonella typhimurium. 857 50

This paper describes a comparative analysis of human and farm animal salmonellosis in Scotland between 1993 and 1996, with particular reference to Salmonella typhimurium definitive type 104 (DT104). Cattle were the main reservoir, accounting for 73.1 per cent of incidents involving all salmonellae and 69.5 per cent of those involving S typhimurium DT104. The annual rates of incidence in people and cattle were recorded in each Health Board area. Dumfries and Galloway had the highest rate of incidence in cattle for all salmonellae (19.0 per 100,000) but people were affected uniformly across mainland Scotland. However, the rate of incidence of S typhimurium DT104 was highest in Dumfries and Galloway for both people (10.1 per 100,000) and cattle (13.0 per 100,000). In Dumfries and Galloway, Wigtownshire had the highest rates for all salmonellae and for S typhimurium DT104 in both people and cattle. In Dumfries and Galloway, 37.8 per cent of the adult cases of S typhimurium DT104 in people were among those known to have had regular contact with animals, and children under six years of age accounted for 36.3 per cent of the human infections in this region.
Vet Rec 1998 Sep 26
PMID:Salmonella typhimurium DT104 infection in people and animals in Scotland: a collaborative epidemiological study 1993-96. 980 Mar

Serum samples from 361 pigs (194 fattening pigs and 167 sows) were examined by means of two commercial ELISAs (Svanovir; Svanova Biotech and Salmotype; Labor Diagnostik) used for the serological diagnosis of salmonellosis in pigs; 211 of the samples came from farms of known bacteriological status and the other 150 were collected randomly from 60 farms of unknown status. The ELISAs were done according to the manufacturers' directions and the samples were categorised accordingly. The results were compared by using a linear regression analysis and by the calculation of Kappa values. To try to improve the agreement between the tests, the raw optical densities (ODS) were transformed to sample/positive (S/P) ratios by using the positive control as a reference, and cut-off values for these S/P ratios were calculated by means of a receiver operating characteristic (ROC) analysis. All but two of the known infected farms were recognised as such by both tests. However, the correlation of the raw ODS for individual pigs was poor (r=0.546) and had a Kappa value for the results categorised according to the manufacturers' recommendations of 0.191. On some farms the correlation was high (r=0.97) but on others it was low (r=0.05) with no apparent reason for the difference. The S/P ratios did not improve the agreement (Kappa=0.25).
Vet Rec 2005 Jul 09
PMID:Comparison of two commercial ELISAs for the serological diagnosis of salmonellosis in pigs. 1600 40

Postmortem examinations were carried out on the carcases of 779 wild birds. Salmonellosis was a common cause of death in greenfinches (Carduelis chloris), house sparrows (Passer domesticus) and chaffinches (Fringilla coelebs), and was also responsible for the deaths of other birds such as goldfinches (Carduelis carduelis), feral pigeons and different species of gulls. Most cases of salmonellosis in finches occurred between January and March, whereas salmonellosis in house sparrows tended to occur between October and March. Salmonella Typhimurium DT40 and DT56 (variant) predominated in finches and sparrows, DT41 and DT195 were the most common strains isolated from gulls, and DT2 and DT99 were recovered from feral pigeons. These "wild bird" strains of Salmonella made up less than 0.5 per cent of the isolates of Salmonella recovered from cattle, sheep, pigs, chickens or turkeys in Great Britain over the same period, but they made up nearly 3 per cent of the isolates from more extensively reared avian livestock such as gamebirds, ducks and geese.
Vet Rec 2006 Jun 17
PMID:Isolation of different serovars of Salmonella enterica from wild birds in Great Britain between 1995 and 2003. 1678 54

One hundred and thirteen finishing pig units and 74 sow units in Catalonia, Spain, were examined to determine the prevalence of salmonella infections and the factors that could be associated with them. Pooled faecal samples were taken from the finishing units, and samples of faeces were collected from individual sows. The Salmonella isolates were serotyped, phage typed and examined for their antimicrobial susceptibility to 18 common antimicrobial drugs. In addition, blood samples from pigs on 141 farms were analysed by ELISA. In both the bacteriological and serological surveys, a questionnaire with 84 questions was completed for each farm. Salmonella species were isolated from 20 per cent of the finishing units and 24 per cent of the sow units; 14 serotypes were detected in the finishing pigs and 11 in the sows. More than 30 per cent of the strains were resistant to tetracycline, sulphonamides, ampicillin or streptomycin, and 69 per cent of the strains were resistant to three or more agents up to 10 compounds. Seventy-seven per cent of the farms had at least one seropositive animal, and 26 per cent of these farms had an individual seroprevalence of 50 per cent or more. The factors associated (P<0.05) with the excretion of Salmonella species in the finishing units were the practice of raising livestock other than pigs (odds ratio [OR]=6.18), the herd size (OR=5.87), and a past history of clinical salmonellosis (OR=4.97). For the sows, the factors associated (P<0.05) with the excretion of Salmonella species were having open-flushed drainage of sewage (OR=34.48), a lack of rodent control measures (OR=0.05) and the number of sows in the unit (OR=9.26). Factors associated with seropositivity in the finishing units were a lack of bird-proof nets (OR=0.30) and the use of water from private wells (OR=3.64).
Vet Rec 2006 Aug 26
PMID:Epidemiology of salmonella infections in pig units and antimicrobial susceptibility profiles of the strains of Salmonella species isolated. 1694 9

Salmonellosis was diagnosed in garden birds from 198 incidents in Scotland between September 1995 and August 2008. Salmonellosis was essentially a disease of finches in the north of Scotland, but in the south of Scotland it was also a problem in house sparrows. Almost all of the incidents were caused by Salmonella Typhimurium phage types 40 or 56/variant, but regional variation in phage types was observed. In the north of Scotland, one phage type (DT 40) predominated, but in the south of Scotland two phage types were commonly isolated (DTs 40 and 56/variant, with the latter the more common of the two phage types). This regional difference was statistically significant for salmonellosis in greenfinches, chaffinches and 'other garden birds', but not for house sparrows. Different temporal patterns for different species of bird and different phage types were also observed within regions. These findings suggest that the epidemiology of salmonellosis in garden birds varies depending on the phage type of Salmonella and the species of garden bird, with additional regional differences depending on the wild bird populations and the phage types of Salmonella in circulation. An awareness of these differences will help when formulating guidelines aimed at reducing the impact of salmonellosis in garden birds.
Vet Rec 2010 Apr 03
PMID:Salmonellosis in garden birds in Scotland, 1995 to 2008: geographic region, Salmonella enterica phage type and bird species. 2036 8

Surveillance data for clinical disease in cattle in Great Britain due to Salmonella infections were analysed for the period 2003 to 2008 in order to describe seasonality and to investigate possible associations between Salmonella diagnoses and other variables such as region, climate, age and production type. A clear seasonal pattern was shown for Salmonella infection, coinciding with the second half of the year. The incidence of Salmonella Dublin and Salmonella Typhimurium was highest in the west of the country, which has the greatest cattle density, but this was not a feature of diagnoses with other serovars. Abortion was a more common clinical sign of S Dublin infections, but was relatively unusual in the case of S Typhimurium. The observed clinical picture and age of affected animals were largely determined by the seasonality of dairy cattle calving in Great Britain.
Vet Rec 2010 Oct 09
PMID:Salmonella infection in cattle in Great Britain, 2003 to 2008. 2125 17


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