Until the recent advancement in diagnostic techniques, Kingella kingae was thought to be a rare bacteria. Kingella kingae is now considered a significant cause of pediatric bacteremia and bone infections in children aged 6 to 48 months. It is one of the etiologies of daycare disease outbreaks in the United States and other countries. Though Kingella kingae is the natural flora of oropharyngeal lining of children between 6 to 48 months, it can get access to the bloodstream through a damaged mucosa to cause system infections. Except in the case of endocarditis and osteoarticular infections, K. kingae infections usually present with mild symptoms.
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