The epidemiology of white scours among calves kept under experimental conditions

Wood, P. C.

doi:10.1002/path.1700700116

Cited by 34 publications

(15 citation statements)

References 17 publications

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“…Thus it has been shown that the incidence of diarrhoea and mortality increased the longer a calf house was occupied (Roy et al 1955;Wood, 1955). They believed that this was due to the natural selection of virulent E. coli strains, because at the beginning of their experiments a heterologous group of E. coli were present but as the occupation time increased certain types became dominant.…”

Section: The Role Of Managementmentioning

confidence: 99%

Aspects of colibacillosis in farm animals

Wray¹,

Ja²

1985

J. Hyg.

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It has been known for a considerable time thatEscherichia coli, although a normal inhabitant of the intestinal tract, can also be associated with a variety of pathological conditions in man, farm animals and poultry.When Escherich (1885) isolated from the faeces of a newborn baby an organism which is now accepted asE. coli, he considered it to be a harmless saprophyte. Laruelle (1889) was the first to suggest the possible pathogenicity of this organism, while Jensen (1893) showed that it was the cause of white scour in calves. The development of reliable serological methods facilitated the differentiation of strains and numerous workers have demonstrated an association between certain serological types ofE. coliand various disease conditions in animals. Enteric diseases in young animals are an important cause of mortality and economic loss to the farming community.

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Section: The Role Of Managementmentioning

confidence: 99%

Aspects of colibacillosis in farm animals

Wray¹,

Ja²

1985

J. Hyg.

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“…Moreover a build-up of "infection" in a calfhouse may occur when a large number of newborn calves are introduced successively into a building (Roy et al, 1955). The rate of build-up, which is characterized by an increasing incidence of diarrhoea and mortality as time progresses, is associated with the development and dominance of enteropathogenic strains of E. coli (Wood, 1955) and is related to (a) the immune status of the calf, (b) the postcolostral diet and (c) probably the air space in terms of cubic capacity per calf and ventilation rate in the calf house. Salmonella typhimurium has increased in importance relative to S. dublin in both the U.K. and France, and the incidence of antibiotic resistance is high (Martel and Fleury, 1979;Threlfall et al, 1979).…”

Section: The Microorganismsmentioning

confidence: 99%

Problems of calf rearing in connection with their mortality and optimal growth: A review

Roy¹

1983

Livestock Production Science

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. Problems of calf rearing in connection with their mortality and optimal growth: a review. Livest. Prod. Sci., 10: 339--349.Protection of calves against enteric and respiratory disorders is dependent on the passive immunity that the calf has received, its innate resistance to infection, the burden of infection in the environment and the nutrition of the calf. Superimposed on these, are the effects of management and physical environment.The plane of nutrition required for dairy heifers during rearing depends on the age at first calving, and for meat animals depends on the carcass weight and fat deposition required at a particular slaughter date in relation to time of birth. PROBLEMS IN RELATION TO MORTALITY0301-6226/83/$03.00

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“…The Escherichia coli population in the intestine of man and animals is a continually changing mixture of many different strains (Sears et al, 1950;Sears and Brownlee, 1952;Wood, 1955 ;Cruickshank et al, 1973). This turnover should be taken into account in epidemiological investigations of E. coli infections.…”

Section: Introductionmentioning

confidence: 99%

The use of phage-sensitivity patterns for tracing heat labile toxin-positive (LT+) Escherichia coli

Monsur

Clemens

Sack

et al. 1989

Journal of Medical Microbiology

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Summary. The heat-labile toxin (LT) positive Escherichia coli colonies from 785 stool specimens obtained during a cholera vaccine trial were examined for their phagesensitivity pattern to 31 E. coli phages. These specimens originated from 105 index cases and their contacts. Isolates with common phage-sensitivity patterns were grouped and were studied further both serologically and for their plasmid profile. The largest group (42 isolates) belonged to serogroup 078 and the second largest group (19 isolates) belonged to serogroup 0 6 . There were 23 index cases which had E. coli with the same phage-sensitivity pattern as some of their contact strains. The identity of isolates from 16 index cases with strains from their respective contacts could be verified serologically. For the remaining seven index cases and their contacts, the isolates did not agglutinate with available antisera. However, subsequent studies demonstrated that, when the phage-sensitivity pattern among the strains matched, the plasmid profiles of these strains also matched. This further indicates the ability of phage-sensitivity patterns to serve as markers in tracing strains.

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The epidemiology of white scours among calves kept under experimental conditions

Cited by 34 publications

References 17 publications

Aspects of colibacillosis in farm animals

Aspects of colibacillosis in farm animals

Problems of calf rearing in connection with their mortality and optimal growth: A review

The use of phage-sensitivity patterns for tracing heat labile toxin-positive (LT+) Escherichia coli

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