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Biomedical subjects

R S Windsor

Publications and source records attributed to R S Windsor.

At least 55 records · Page 3Linked to original sources
PubMed1975

Streptococcal infection in young pigs. IV. An outbreak of streptococcal meningitis in weaned pigs.

Twenty-eight pigs died in an outbreak of streptococcal meningitis in an East Anglian herd. Most were 10-14 weeks old. The outbreak lasted from January to April and was finally controlled by antibiotic therapy. A similar number of losses had occurred in the previous year though no diagnosis had then been made. The causal agent appeared to be a haemolytic streptococcus belonging to group D and provisionally designated Streptococcus suis type 2. It is probably identical with de Moor's group R streptococcus which causes a similar disease in the Netherlands. It is serologically distinct from Streptococcus suis type 1 which causes meningitis in piglets. Type 2 infection in pigs appears to be widespread in England and Wales and to occur in animals up to the age of at least 14 weeks. A comparison is drawn between Str. suis meningitis in pigs and group B streptococcal meningitis in human infants.

Agglutination Tests↗
PubMed1973

Cell-mediated immune response in cattle to Mycoplasma mycoides var. mycoides.

The cell-mediated immune response of cattle to Mycoplasma mycoides var. mycoides was studied. Sensitized lymphocytes in blood leukocyte preparations showed a significant degree of antigen-induced transformation, judged by the uptake of tritiated thymidine. The increase in tritiated thymidine uptake in sensitized lymphocytes in the presence of M. mycoides membrane antigen varied from 2- to 13-fold compared with the controls, and this increase in activity was observed from 3 days after artificial infection. Inhibition of leukocyte migration by M. mycoides membrane antigen commenced between 17 and 30 days after infection, and preliminary observations indicate that this test correlated with the intradermal allergic test. M. mycoides-induced unresponsiveness was demonstrated 23 and 30 days after infection. Unresponsiveness, in that the lymphocytes did not respond to phytohemagglutinin, was very marked in two of three animals and partial in the third animal, whereas the humoral antibody response did not appear to be affected. Antigen-induced transformation was demonstrated in only two out of six cattle vaccinated two months previously with M. mycoides T(1) broth culture vaccine, and óne animal only gave a doubtful intradermal allergic reaction. A further six cattle vaccinated 15 months previously were negative to both the leukocyte migration inhibition test and the intradermal allergic test.

Animals↗