Volume 24, Issue 2 (December)

Effect of PH and Temperature on Cell Viability and Haemolysin Production by Listeria Spp. Isolated from Uncooked Meat and Vegetable Samples in Nsukka, Nigeria

Haemolysin (Listeriolysin O) is a major virulence factor in pathogenic strains of Listeria. Presently, the conditions for its production are not fully elucidated. This study examined the influence of culture pH and temperature on cell viability, multiplication and haemolysin production by fresh isolates of L. monocytogenes, L. ivanovii and L. seeligieri. At 5oC and pH 3.8 to 4.8, there was a signi...