Abstract
We report a case of necrotizing fasciitis involving Streptococcus agalactiae, Arcanobacterium haemolyticum, and Finegoldia magna in a 36-yr-old female diabetic patient, which started after a minor dog bite to the toe of the patient. This case suggested that a trivial infection after a minor dog bite in an immunocompromised patient such as diabetes patient could result in a significant complication such as necrotizing fasciitis. The life-threatening infection was cured by timely above-the-knee amputation, as well as penicillin G and clindamycin therapy.
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Table 1.
Specimens | Characteristics of isolates | Identification | MIC (μg/mL)‡ | |
---|---|---|---|---|
Penicillin G | Clindamycin | |||
Wound∗ | Heavy growth of small, pleomorphic, gram-positive bacilli after 24 hr aerobic culture | Arcanobacterium haemolyticum by API Coryne strip† | 0.008 | 0.06 |
Colonies were small in size with a narrow zone of hemolysis | ||||
Positive CAMP-inhibition reaction with S. aureus | ||||
Heavy growth of gram-positive cocci in chain after 24 hr aerobic culture | Streptococcus agalactiae by Vitek GPI card† | 0.064 | 0.06 | |
Colonies were small with incomplete hemolysis | ||||
Positive latex-agglutination test with group B reagent of Streptex test (Remel, Lenexa, KS) | ||||
Heavy growth of gram-positive cocci in clusters after 48-hr anaerobic culture | Finegoldia magna by ATB rapid ID 32A strip† | Not tested | Not tested | |
Small nonhemolytic colonies | ||||
Blood | All three aerobic blood cultures (BacT/ALERT 3D†) yielded S. agalactiae. Anaerobic blood cultures using thioglycollate broth (Micromedia, Busan, Korea) did not yield any anaerobe | S. agalactiae by Vitek GPI card† | 0.064 | 0.06 |
∗ , Both of the two wound specimens taken at the time of hospitalization and operation yielded the same organisms;