Region IV

Florida Branch

This territory encompasses Florida zip code areas 33000-33499, 33900-34099, 34900-34999.

North Carolina Branch

This territory includes all zip codes in the state of North Carolina.

Puerto Rico Branch (Puerto Rico Society of Microbiologists)

This territory encompasses the Commonwealth of Puerto Rico.

South Carolina Branch 

This territory includes all zip codes in the state of South Carolina.

South Central Branch 

This territory includes all zip codes in the states of Arkansas, Louisiana, and Mississippi.

Southeastern Branch 

This territory includes all zip codes in the states of Alabama, Georgia, and Florida zip code areas 32000-32099, 32200-32999, 33500-33899, 34200-34299, and 34600-34699