PubMed Health⌕ Search

Biomedical subjects

W Plowright

Publications and source records attributed to W Plowright.

At least 37 records · Page 2Linked to original sources
PubMed1971

Investigations of Allerton-type herpes virus infection in East African game animals and cattle.

Neutralization tests with a strain (BA) of Allerton-type herpes virus, derived from a buffalo (Syncerus caffer) were carried out on 924 sera from 17 species of E. African game animals and on cattle sera from Tanzania (2001), Kenya (792) and Uganda (410).Buffalo populations throughout E. Africa showed a very high rate of infection, with all animals over 2 years of age serologically positive. Antibody was present in some giraffe, waterbuck and hippopotamus sera and, less frequently, in impala, eland, bushbuck and oryx. Data are provided on the titres of positive samples; the mean titre of buffalo sera increased with age.Cattle in many localities of N. Tanzania and S. Kenya showed a very high rate of infection, 85-95% of sera from animals more than 2-years old containing antibody; the titres recorded were lower than those in buffaloes. Very high infection rates were also found in Karamoja and Teso (Uganda) and also in some other areas of Kenya, whilst a considerably lower incidence of infection was detected in W. Nile Province of Uganda and in central Tanzania. Differences in infection rates may have been related to herd size and husbandry practices.It was shown that a wave of infection was probably spreading through cattle in N. Tanzania at about the same time as an outbreak of disease occurred in buffaloes and it is suggested that virus transmission may have been by biting flies.No clinical signs attributable to the virus were reported in cattle but mouth lesions similar to those recorded in buffaloes, or nasal lesions, could have passed undetected. Allerton-type virus probably produces a range of clinical syndromes in cattle, closely resembling those associated with some herpes viruses in primates but infection is seldom related in the field to either pseudo-lumpy skin disease, mammillitis or stomatitis.

Africa, Eastern↗
PubMed1971

A focus of rumenal cancer in Kenyan cattle.

A minimal incidence rate of 2·5% of rumenal cancer of cattle in the Nasampolai valley of Kenya Masailand has been established.Carcinoma of the oesophagus and oesophageal region of the stomach in two free-living giant forest hogs from the same area is reported.The high incidence of the bovine disease is thought to be associated with the abnormal forest grazing of the cattle.The possible aetiology of the disease is discussed.

Agriculture↗
PubMed1970

The excretion of two virulent strains of African swine fever virus by domestic pigs.

Daily observations were made on the excretion of African swine fever (ASF) virus by pigs infected intranasally or by contact. Two strains of virus having mean death times of approximately 3 and 6 days were used, the latter being recently isolated from a warthog.First excretion usually occurred by the nasopharyngeal route, as early as 1 or 2 days before the onset of fever in many cases. The titres of pharyngeal and nasal swabs rose rapidly to reach mean levels of about 10(4)-10(5) HAD 50 at 48-72 hr. following the onset of pyrexia. Virus in the secretions of the conjunctiva or lower urogenital tract appeared later and did not attain such high levels. Faecal and urinary excretion was of relatively little significance, except in slower infections caused by the recent warthog virus.These results are discussed in relation to the known failure of infected pigs to transmit the disease to stallmates during the first 12-24 hr. of pyrexia and also in relation to recent work on the pathogenesis of ASF in domestic swine.

African Swine Fever↗