Among pathogenic oomycetes, Pythium insidiosum is known to infect humans.
Elicitins form a unique group of proteins found only in oomycetes.
The secreted form of elicitin protein, ELI025, was detected in all P. insidiosum strains tested.
Some P. insidiosum strains lack the glycosylated form of secreted ELI025.
Some patients fail to mount a detectable antibody response to ELI025.