NORMAL guinea pig serum is the most common source of complement for the complement-fixation test, and may be used fresh or, more commonly, preserved either by freeze-drying or by Richardson's method 1 ...

EARLIER investigations have shown that cattle which exhibit a marked degree of natural resistance to infection with Haemonchus spp. also develop higher complement-fixation titres than susceptible ...

This is a preview. Log in through your library . Abstract Sera were collected from female cattle in 118 commercial herds being subjected to a programme to eradicate brucellosis by test and slaughter, ...