B. parapertussis causes a disease similar to whooping cough in humans, and B. bronchiseptica infects a range of mammal hosts, ... Adults have milder symptoms, such as prolonged coughing without the "whoop". Infants less than six months also may not have the ... It also decreases the function of tissue-resident macrophages, which are responsible for some bacterial clearance. Another ... and the causative agent of pertussis or whooping cough. Like B. bronchiseptica, B. pertussis can express a flagellum-like ...