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.
a genus of gram-negative coccobacilli, some species of which are pathogens of the respiratory tract of humans, including Bordetella bronchiseptica, B. parapertussis, which causes mild pharyngitis, and B. pertussis, the causative agent of pertussis. See also parapertussis, pertussis.