Microorganisms were isolated from 30 cases of infectious sialoadenitis and the choice of antibiotics was studied.
1. Sixteen patients had submaxillary gland infections and 14 had parotitis.
2. Fifty-five strains of bacteria were isolated and classified:
Streptococcus pneumoniae (7.2%), Staphylococcus aureus (7.2%), Streptococcus pyogenes (5.2%), Peptostreptococcus (20%), Peptococcus (10.9%), Streptococcus intermedius (7.2%), Bacteroides (9.1%), and Fusobacterium (7.2%).
3. There were 17 strains (31%) of aerobes, and 38 strains (69%) of anaerobes.
4. S. aureus has been the main causative pathogen of parotitis, but in our series anaerobes were the most important causative pathogens in infectious sialoadenitis.
5. Antibiotics were selected according to the Expected Efficacy Index (EEI), the antibiotic of first choice being cefotiam or ampicillin for injection, and ampicillin or clindamycin per os.