1. Staphylococcus aureus gram positive cocci seen in
groups. Aerobic, facultative anaerobic
2. Streptococcus pyogenes gram positive seen mostly in
odontogenic infections
3. E.coli- gram negative bacilli which is a present inn
oral cavity
4. Bordetella pertussis - most important and causative
agent of whooping cough. Gram negative aerobic pathogenic, encapsulated
cocobacillus
5. Vibrio cholerae - comma shaped gram positive cocci