Microbiological study of eikenella corrodens isolated from patients and healthy individuals

ABSTRACT

A total of 99 strains of E. corrodens were isolated in this research. Seventy strains were isolated as flora from 392 normal individuals [17.85%] and 29 strains from 539 in pure form in 2 of the 29 clinical specimens [6.8%], otherwise It was mixed with other bacteria. Most of the isolations were from the mouth [74] but the organism was also recovered from 11 wounds, 7 abscesses and 7 samples of sputum, fluid and transtracheal aspirate. The most common form of E. corrodens infection was the clenched first injuries [33.3%] followed by human bite wounds [20%] and periodontitis [20%]. It is found that colonies of only 71.7% of our isolates were pitting the surface. A comparative growth was studied on 10 media incubated in 3 atmospheres. Chocolate and blood agar found to be the best media using 5% CO[2], Fifty strains tested for 9 biochemical reactions, gave typical results as found by other authors. MIC has been done for 20 strains by the agar dilation and microtiter broth dilution methos E. corrodens found highly susceptible to penicillin and cefoxitin but fairly resistant to clindamycin