Cornyebacterium is a gram positive, facultatively anaerobic, non motile, rod shaped actinobateria. Infection by diphtheroids tend to occur in elderly, neutropenic, or immunocompromised patients, and those who have indwelling prosthetic devices such as heart valves, neurologic shunts, or catheters.  Some nondiphtheria species of<unk>  produce disease in specific animal species, and some of these are also human pathogens. Some species attack healthy hosts, and others attack immunosuppressed hosts. Some of their effects include granulomatous lymphadenitis, pneumonitis, pharyngitis, skin infections, and endocarditis. Endocarditis caused by<unk>  spp. is particularly seen in patients with indwelling intravascular devices.
Corynebacterium
Pseudomonas
Mycoplasma
Mycobacterium
Legionella
Rhodococcus
Candida 
Neisseria