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 58,342 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Calf diarrhoea is an important cause of economic loss. The aetiology of the disease is considered with particular reference to the role of viruses. Although many microbial organisms have been associated with the disease, there is doubt concerning their true role as causative agents. Two viruses, neonatal calf diarrhoea reovirus-life agent and calf coronavirus, have been discovered recently which appear to play an important role in many cases of diarrhoea and the evidence for considering them to be primary causes of the disease is discussed.
Vet Rec 1975 Jan 25
PMID:Viral enteritis of calves. 16 17

An eruptive condition seen on certain mucous membranes of dogs occurs frequently but often asymptomatically. Lesions have been found to be present in over 60 percent of male dogs. The infection is probably due to a canine herpes virus and has been termed conveniently but inaccurately "dog pox". In many cases lesions are present without observable clinical signs but severe irritation, especially related to lesions in the lower bowel, can give rise to marked symptoms which may be confused with abnormality of the para-anal sacs, or to chronic diarrhoea of a type suggestive of colitis. The incidence, sites of infection and possible syndromes which may be ascribed to the condition are briefly discussed on a clinical basis only.
Vet Rec 1975 Apr 05
PMID:"Dog pox": some clinical aspects of an eruptive condition of certain mucous surfaces in dogs. 16 10

The occurrence of diarrhoea in calves was monitored during the first three weeks of life. Calves fed amounts of colostrum sufficient to produce serum Ig levels in excess of 30 mg per ml did not develop diarrhoea, whereas calves fed less colostrum did. Rotaviruses and mycoplasma-like particles were observed in the faeces of calves with and without diarrhoea. The epidemiology of rotavirus infection in calves is discussed.
Vet Rec 1976 Sep 18
PMID:Studies on rotavirus infection and diarrhoea in young calves. 18 78

The effect of colostrum or serum feeding on subsequent rotavirus infections was investigated in neonatal gnotobiotic lambs. Immunity after feeding colostrum did not depend on absorption of passively acquired antibody into the circulation. Protection against clinical disease depended on the volume of colostrum ingested. The protection afforded by feeding serum was specific, since serum free of rotavirus antibody failed to confer protection. Immune serum fed at a rate of 2.5 ml per kg twice daily protected against rotavirus infection. Also, it was shown by intraperitoneal inoculation of immune serum that protection could occur in the absence of ingested antibody, presumably by transfer of antibody into the gut. The implications of these findings for immunoprophylaxis of rotavirus diarrhoea in lambs and calves are discussed.
Vet Rec 1978 Feb 18
PMID:The immunoprophylaxis of of rotavirus infections in lambs. 20 88

Published information on rotaviruses as pathogens, the source of virus infection and the method of transmission of infection under normal conditions are reviewed. The antigenic differences between rotavirus isolates from children, calves, pigs, foals and mice are discussed. Bovine rotaviruses isolated in the USA and the UK were shown to be closely related antigenically and the US vaccine strain protected calves from challenge with the UK rotavirus. Nineteen normally reared calves, with 20 or more ZnSO4 units of serum delta globulin, were susceptible to rotavirus inoculation at two days of age. They developed diarrhoea, showed body weight loss but recovered. Three calves with less than 10 ZnSO4 units of serum delta globulin developed diarrhoea and died. In a serological survey of 654 adult cows and calves from three herds, between 2 per cent and 37 per cent of individuals in a group had low rotavirus antibody titres and were probably susceptible to rotavirus infection. These were found in all age groups of animals studied, whether or not the group had suffered a recent rotavirus epizootic. It was not possible to predict whether an epizootic would develop on the basis of a serological survey.
Vet Rec 1978 Jul 15
PMID:Epizootiology of bovine rotavirus infection. 21 96

Two genetically related sheep that produced border disease-affected lambs from successive pregnancies were identified. These sheep, and some of their progeny, were found to be persistently infected with a virus antigenically related to bovine virus diarrhoea/mucosal disease virus. Only one of the sheep developed detectable serum antibody to the virus, and this animal only produced it 12 months after being detected as infected. The epidemiological significance of sheep persistently infected with border disease virus is discussed.
Vet Rec 1979 May 05
PMID:Border disease: persistant infection with the virus. 22 56

An inactivated virus vaccine containing strains of parainfluenza type 3 (PI3), bovine adenovirus type 3, reovirus type 1, bovine virus diarrhoea (BVD) and infectious bovine rhinotracheitis (IBR) viruses was tested in a group of 58 calves reared in a semi-intensive management system. Following vaccination, 1/30, 14/30 and 17/30, showed significant rises in antibody titre to reovirus type 1, adenovirus type 3 and IBR respectively. None of the animals showed significant serological response to PI 3 and BVD. In the control group, 2/28, 1/28, 6/28 and 3/28 developed antibody responses to reovirus type 1, BVD, adenovirus type 3 and IBR respectively. Microbiological examination revealed the presence of a wide variety of commensal bacteria and Mycoplasma bovirhinis in both groups. Analysis of the records of clinical examinations indicated that the respiratory tract infections occurred among the calves at between 50 and 80 days after arrival at the farm, and that there was no significant difference between the test and the control groups. A number of animals had maternal antibodies to the various components of the vaccine present before the trial commenced and these antibodies appeared to interfere with the subsequent serological response to the antigen challenge. The vaccination schedule recommended by the manufacturer does not entirely circumvent this problem.
Vet Rec 1979 Nov 03
PMID:A field trial with a multicomponent inactivated respiratory viral vaccine. 23 26

The clinical and epidemiological features of an outbreak of salmonellosis due to Salmonella enteritidis in a group of calves are described. The major clinical signs were dullness, pyrexia and diarrhoea. Five of the 15 calves died but deaths were mainly confined to the younger members of the group. The recovery of salmonella organisms from rectal swabs was maximal shortly before four of the five deaths occurred and declined rapidly thereafter. Only two of the surviving 10 calves developed significant flagellar agglutination titres.
Vet Rec 1977 Nov 12
PMID:Salmonellosis in young calves due to Salmonella enteritidis. 34 75

There was a high incidence of neonatal scours in 38 litters of pigs born at Compton in a four month period during 1978. The most important cause of the disease was an enteropathogenic Escherichia coli strain which possessed the K88 antigen. The Compton herd has been bred to produce pigs of three genotypes with respect to the presence or absence of the intestinal receptor for the K88 antigen. These are homozygous dominants (SS) and heterozygotes (Ss) susceptible to infection by virulent K88-positive E coli, and homozygous recessives (ss) resistant to the disease. The highest incidence of diarrhoea was in the susceptible progeny of resistant dams and susceptible sires. There was no K88 associated diarrhoea in resistant progeny or in susceptible progeny of susceptible dams.
Vet Rec 1979 Sep 08
PMID:Escherichia coli diarrhoea in pigs with or without the K88 receptor. 39 11

Inocula derived from two sources of typical border disease (BD) and designated BP-77 and H-77 respectively, were prepared and injected into pregnant ewes of four breeds. The BP-77 inoculum produced higher serum neutralising antibody titres to the cytopathic BD virus than to the NADL strain of bovine virus diarrhoea virus. Only typical BD occurred among the progeny of all four breeds. In contrast H-77 produced higher titres to bovine virus diarrhoea than to BD and typical BD occurred only in the progeny of two of the four breeds. Progeny of the other two breeds appeared normal or had a range of malformations of the central nervous system but none of the characteristic clinical or pathological stigmata of BD. The existence of more than one strain of BD virus is confirmed. Virus strain/host genotype interactions may affect the character of disease in the progeny. The possible implications for diagnosis and control are discussed. It is concluded that the generally accepted criteria for diagnosis of BD are no longer adequate and that the disorder should be redesignated.
Vet Rec 1979 Apr 14
PMID:The definition of border disease: problems for the diagnostician. 47 26


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