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Kingella kingae
80%
2633/3286
Mycobacterium tuberculosis
6%
188/3286
Mycobacterium avium
2%
82/3286
Neisseria
7%
215/3286
E-coli
4%
144/3286
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Kingella kingae is a fastidious organism which is recovered on blood culture medium, recently with the addition of the BACTEC blood culture system (Illustration A). Mycobacterium tuberculosis is grown on Lowenstein Jensen (LJ) medium, while Mycobacterium avium can be grown on the LJ or Middlebrook medium. Neisseria is typically grown on the Thayer-Martin medium. E-coli is grown on the Luria Bertani medium. Petti et al studied the use of standard and extended blood culture incubation for Haemophilus, Actinobacillus, Cardiobacterium, Eikenella, and Kingella (HACEK) bacteria. Although all are fastidious organisms, they determined that standard incubation time on a blood culture medium is sufficient to recover HACEK bacteria. Yugupsky et al investigated the recovery of Kingella kinage in solid media and the BACTEC automated blood culture system. The BACTEC system is shown in Illustration A. They concluded that the BACTEC blood culture system enhances the recovery of the bacteria in joint fluid over solid mediums. They concluded that Kingella kingae is a more common cause of pediatric septic arthritis than previously reported.
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