Distribution of the eight profiles of invasion in field isolates from Peru, Colombia and Brazil.

<p>(<b>A</b>) The number of isolates using a specific invasion profile based on their combined sensitivity to neuraminidase (N), trypsin (T) and chymotrypsin (C). Sensitive (s) is defined as less than 50% of invasion into enzymes-treated RBC (white box) and resistant (r) is defined as higher than 50% of invasion (gray box). (<b>B</b>) Percentage of invasion profiles in each area of study is presented using pie charts. Brazilian isolates include those from Belém and Mato Grosso.