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Biomedical subjects

W Coackley

Publications and source records attributed to W Coackley.

At least 19 recordsLinked to original sources
PubMed1985

Response of merino sheep to inoculation with a caprine retrovirus.

Maedi-visna has never been recorded in Australia. However, caprine retroviruses have been isolated which cause clinical disease similar to caprine arthritis-encephalitis and produce antibodies in goats similar to those caused by maedi-visna virus. Merino lambs in close contact for up to 109 weeks with three goats experimentally infected with a caprine retrovirus did not seroconvert or show any significant pathological lesions. No viruses were isolated from any of these sheep though the goats seroconverted and two out of the three developed a non-suppurative bursitis and arthritis. Merino lambs inoculated with a caprine retrovirus showed no significant clinical signs or pathological lesions over a period of 140 weeks though nine out of the 12 seroconverted and viraemia was demonstrated in seven.

Animals↗
PubMed1984

Preparation and evaluation of antigens used in serological tests for caprine syncytial retrovirus antibody in sheep and goat sera.

Methods used to prepare antigens from caprine syncytial retrovirus (CSR) for use in the agarose gel immunodiffusion test (AGID) or an indirect enzyme-linked immunosorbent assay (ELISA) are described. Caprine and ovine sera were tested for antibody to CSR using the AGID test and ELISA incorporating a caprine system (CSR antigen and rabbit anti-goat IgG) or an ovine system (maedi-visna virus antigen and rabbit anti-sheep IgG). Good correlation was achieved in the results of the 3 tests when sera were devoid of antibody or were strongly positive. Variations in the results on weakly positive sera were considered to be more a matter of interpretation than due to basic differences in the reagents employed.

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PubMed1980

A possible bovine polyomavirus.

A virus with the characteristics of a polyomavirus was isolated from tissue cultures prepared from the kidneys of a healthy new-born calf.

Animals↗
PubMed1980

A serological survey for bluetongue virus antibody in Western Australia.

A serological survey was carried out to detect specific (serotype 20) and a group bluetongue virus antibody in cattle and sheep serums collected in Western Australia during the period January 1 1978 to June 30 1979. Of 18,849 cattle serums examined by the gel diffusion precipitin test (GDPT), 9.7% were positive and 6.1% gave doubtful results. All 1949 sheep serums tested were negative. Precipitin antibody was demonstrated in 22.5% of serums from Kimberley cattle and 3.6% of cattle serums from the Northwest. Serums collected from cattle in the South were consistently negative in GDPT. When 915 serums that reacted in the GDPT were further tested by the complement fixation test (CFT), 164 were positive. The percentage of CFT positive serums increased as the GDPT reaction became stronger. 2467 serums collected from cattle in Kimberley and Northwest areas and tested by the CFT, 175 (7.1%) were positive. These 175 positive serums were also examined by GDPT and 164 doubtful or positive reactions were obtained. The virus neutralisation (VNT) using serotype 20 virus was carried out on 3804 serums, including all serums that reacted in the GDPT, and 57 were positive. When the VNT positive serums were examined in the other 2 tests, 47 serums were either positive or doubtful in the GDPT and 8 were positive in the CFT. The presence of bluetongue virus group antibody in cattle serums closely followed the suggested distribution pattern of Culicoides brevitarsis but specific serotype 20 neutralising antibody was limited to cattle serums from stations situated north of latitude 17 degrees S in an area of mean annual rainfall higher than 700 mm.

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