A screening test for infectious mononucleosis is described, based on the fact that antibodies against sheep red cells remaining after absorption of the serum by papain-treated sheep red cells appear to be specific for the disease. The test appears to be more useful in diagnosis than classical absorption techniques and has the advantage of being specific while maintaining a high degree of sensit...

The A reagent: The A reagent (Table 1 ) was an unabsorbed, isoimmune antiserum. It was produced in a sheep named A, which received five intrajugular injections, at five-day intervals, of 5 ml of citrated blood from a sheep named B. The antiserum was collected five days after the last injection. Sheep A was of blood-group R in the R 0 system, and a preimmunization sample of her serum contained n...

This paper reviews research being undertaken by ILRI and collaborators to identify Quantitative Trait Loci (QTL) for resistance to gastrointestinal (GI) nematodes in the resistant East African Red Maasai sheep and in inbred strains of mice. Six F1 rams, crosses of Red Maasai (resistant) and Dorper (susceptible) sheep, were bred and then backcrossed to pure Red Maasai and Dorper ewes to produce ...

1. The fatty acids of the triacylglycerols of subcutaneous adipose tissue of cattle, sheep, goats and red deer (Cervus elaphus) which consumed either herbage or a barley-rich diet were analysed for their content of branched-chain components. 2. Whereas the consumption of the barley-rich diet by sheep and goats was associated with the occurrence of relatively high proportions of branched-chain f...

A survey of the published electrophoretic mobilities of certain mammalian red cells reveals that the isoelectric points accorded to these cells are the result of equilibria incidental to red cell destruction. The electrophoretic mobilities of normal washed sheep and human cells have now been studied in 0.85 per cent NaCl solutions from about pH 3.6 to 7.4. All measurements were made within 2 mi...

Blood was sampled from sheep of 3 flocks, selectively bred for either high (Fl+) or low (Fl-) clean fleece weight or randomly bred (R). Under maintenance (M) and, subsequently, sub-maintenance (0.8xM) or supra-maintenance (1.6xM) feeding regimes, Fl+ sheep had significantly lower concentrations of cystine in plasma than R sheep, which in turn had significantly lower concentrations of cystine th...

When a pathogen infects a number of different hosts, the process of determining the relative importance of each host species to the persistence of the pathogen is often complex. Removal of a host species is a potential but rarely possible way of discovering the importance of that species to the dynamics of the disease. This study presents the results of a 12-year programme aimed at controlling ...

For many years, the Paul-Bunnell reaction (Paul and Bunnell, 1932) to demonstrate the presence of heterophile antibodies to sheep red cells has been accepted as a specific test for establishing the diagnosis of infectious mononucleosis. Stuart (1935), Bailey and Raffel (1935), and Davidsohn and Walker (1935) independently differentiated the antibodies for Forssman antigen and those of serum sic...

A study on hemagglutination and hemolysis by Escherichia coli O111 and O55 (rabbit) antisera and on hemagglutination and hemolysis inhibition by E. coli O111 and O55 antigens revealed the following facts. 1. Red blood cells of man, dog, rabbit, guinea pig, sheep, rat, and chicken adsorb E. coli O111 and O55 antigens and thus become specifically agglutinable by the homologous E. coli antisera. 2...

Data from smallholder flocks of adult West African Dwarf (WAD) and Red Sokoto goats (n = 824) and Yankasa, Uda and Balami sheep (n = 636) were utilized to investigate the distribution and frequencies of certain qualitative traits. The animals were randomly sampled in Northern parts of Nigeria. They were scored for the presence or absence of wattle, beard, horn, coat colour [Phaeomelanic standar...