Figure 5.

Gram-stain showing the positive detection of GAS biofilm (b) in a chinchilla sample (A). Detection of a Gram-positive biofilm (b) in a tonsil removed due to recurrent GAS infection (B) or ATH (C and D).

Roberts et al. BMC Pediatrics 2012 12:3   doi:10.1186/1471-2431-12-3
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