<unk>  is caused by toxigenic strains of Corynebacterium<unk> e biotype mitis, gravis, intermedius,  or belfanti.  The bacteria produce an exotoxin that, if absorbed in the bloodstream, may  damage nerves and organs such as the heart and kidneys.
Diphtheria
Pertussis
Swine influenza
Avian influenza
Anthrax
Periodic fever syndrome
Influenza
Lemierre's syndrome