Journal List > Korean J Lab Med > v.28(3) > 1011465

Lee, Roh, Kim, Yong, Choi, Lee, Lee, and Chong: A Case of Necrotizing Fasciitis Due to Streptococcus agalactiae, Arcanobacterium haemolyticum, and Finegoldia magna in a Dog-bitten Patient with Diabetes

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.
Characteristics of bacterial isolates from the patient with necrotizing fasciitis
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;

, The culture and identification systems were from bioMerieux (Marcy l'Etoile, France);

, MIC determination: penicillin G by the Etest and clindamycin by the agar dilution method of Clinical and Laboratory Standards Institute using 5% blood supplemented Mueller-Hinton agar.

Abbreviation: MIC, minimum inhibitory concentration

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