Pertussis also called whooping cough, is a noticeably contagious respiratory disorder. it's miles as a result of the bacterium Bordetella pertussis. Pertussis is thought for uncontrollable, violent coughing which regularly makes it tough to breathe. Bordetella pertussis is a Gram-bad, cardio, pathogenic, encapsulated coccobacillus of the genus Bordetella, and the causative agent of pertussis or whooping cough. Like B. bronchiseptica, B. pertussis is motile and expresses a flagellum-like shape. Its virulence factors consist of pertussis toxin, adenylate cyclase toxin, filamentous hæmagglutinin, pertactin, fimbria, and tracheal cytotoxin.