A serological survey was conducted to determine the prevalence of antibodies to Newcastle disease virus in apparently healthy and unvaccinated adult indigenous chickens. Haemagglutination inhibiting antibodies to Newcastle disease virus were found in the sera of 51 out of 89 (57.3%) chickens sampled.

Two infants were considered to have acquired cytomegalovirus (CMV) infection from blood transfusions screened for the presence of CMV antibody by a haemagglutination assay. Further samples from the same donors were tested by a latex agglutination test; six of 18 (33%) previously believed seronegative were found to be seropositive.

background and aims: adventitious agents, especially viral agents are among the most important concerns in viral vaccines. viral contamination of biological products may arise from the original source of the reagents such as, serum, trypsin, animal or human derived media components or cell culture and working seed or cross contamination of vaccine during production. in this study, adventitious ...

A recently introduced indirect haemagglutination kit for the detection of Mycoplasma pneumoniae antibodies is compared with the standard method complement fixation. It is concluded that the kit provides a rapid, simple, and moderately sensitive means of detecting antibodies and, in some cases, enables these to be detected in the early, acute stage of infection.

Four strains of RHDV assigned as haemagglutinating (Vt97 and Hartmannsdorf) and non-haemagglutinating (Pv97 and 9905) antigenic variants were examined for dynamic changes in the values of white and red blood cells indexes. The study showed differences among strains examined that were not depending on haemagglutination property.

Antibodies against snake venom or antivenom potency are assayed quantitatively by in-vivo neutralization test in mice, which requires large number of laboratory animals. In potency assays of biological substances such as antivenoms, it is highly desirable to avoid suffering and death of animals by substituting in-vivo method with in-vitro methods, provided such methods measure life-saving capab...