Generally clinical diagnosis, though blood cultures may assist in ultimate diagnosis and<unk>  PCR testing exists
CT and surgical consult if concern for nec fas
CBC, BMP, LFTs if significant vomiting
Vibrio vulnificus
Cellulitis
Vibrio parahemolyticus
Hand cellulitis
Bacillus cereus
Facial cellulitis
Bacteroides fragilis
Orbital cellulitis