What is the single season highest batting average of any pitcher in MLB history?   Since 1973, the highest single season batting average by a pitcher was in 1993 when Orel Hershiser hit .356 (26 for 73) for the Dodgers. I was not able to find a list ofâ¦ batting averages pre 1973 but I know there has to be one on the Web somewhere.
Causes. Pertussis, a respiratory illness commonly known as whooping cough, is a very contagious disease caused by a type of bacteria called Bordetella pertussis.
Bordetella pertussis has several virulence factors, one of which is the adenylate cyclase toxin (CyaA). It is the agent that causes whooping cough. CyaA invades eukaryotic cells by a calcium-dependent mechanism in which the CyaA catalytic domain is directly moved across the target cellâs plasma membrane.