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.
Canine Bordetella is usually caused by bacteria. Depending upon the severity of the case, antibiotics may or may not be prescribed. Antibiotics are usually given to reduce the risk of a secondary infection, such as pneumonia, or if it is likely that bacteria has caused the infection.