Rich focus

A Rich focus is a tuberculous granuloma occurring on the cortex of the brain that ruptures into the subarachnoid space, causing tuberculous meningitis.^[1]

It is named for Arnold Rice Rich who first described it.

References

↑ Donald PR, Schaaf HS, Schoeman JF (April 2005). "Tuberculous meningitis and miliary tuberculosis: the Rich focus revisited". J. Infect. 50 (3): 193–5. doi:10.1016/j.jinf.2004.02.010. PMID 15780412.

Gram-positive bacterial infection: Actinobacteria (primarily A00–A79, 001–041, 080–109)

Actinomycineae

Actinomycetaceae	Actinomyces israelii Actinomycosis Cutaneous actinomycosis Tropheryma whipplei Whipple's disease Arcanobacterium haemolyticum Arcanobacterium haemolyticum infection Actinomyces gerencseriae

Propionibacteriaceae	Propionibacterium acnes

Corynebacterineae

Mycobacteriaceae

M. tuberculosis/
M. bovis

M. leprae

Nontuberculous

R1:	M. kansasii M. marinum Aquarium granuloma

R2:	M. gordonae

R3:	M. avium complex/Mycobacterium avium/Mycobacterium intracellulare/MAP MAI infection M. ulcerans Buruli ulcer M. haemophilum

R4/RG:	M. fortuitum M. chelonae M. abscessus

Nocardiaceae

Corynebacteriaceae

Bifidobacteriaceae

Gardnerella vaginalis

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