Characterization of the hemolytic activity of Riemerella anatipestifer.

In this study, 29 of 52 R. anatipestifer strains showed hemolytic activity on duck blood agar, whereas all the tested dba+ (with hemolytic activity on duck blood agar) and dba- strains created pores in the duck red blood cells, with 4.35-9.03% hemolytic activity in a liquid hemolysis assay after incubation for 24 h. The concentrated culture supernatants of all the tested R. anatipestifer strains and the extracted outer membrane proteins (OMPs) from dba+ R. anatipestifer strains showed hemolytic activity on duck blood agar. These results, together with the median lethal dose (LD50) of some dba+ and dba- R. anatipestifer strains in ducklings, suggested that there was no direct relationship between the hemolytic capacity of R. anatipestifer on duck blood agar and its virulence.
PMID: 32159508 [PubMed - as supplied by publisher]

Source: Microbiology - March 10, 2020 Category: Microbiology Authors: Gong Y, Yang Y, Chen Y, Sun B, Xue Y, Xu X, Wang X, Islam N, Du X, Hu Q Tags: Microbiology Source Type: research