Pilus Colonization Factors of Enterotoxigenic Escherichia Coli Isolated from Infantile Diarrheal Patients in Papua New Guinea

Takeshi HondaResearch Institute for Microbial Diseases, Osaka University, Yamadaoka, Suita, Osaka, Japan

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Nuanchawee WetprasitResearch Institute for Microbial Diseases, Osaka University, Yamadaoka, Suita, Osaka, Japan

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Michiko AritaResearch Institute for Microbial Diseases, Osaka University, Yamadaoka, Suita, Osaka, Japan

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Toshio MiwataniResearch Institute for Microbial Diseases, Osaka University, Yamadaoka, Suita, Osaka, Japan

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We examined the possibility of pilus colonization factor (or adhesin) production by 9 enterotoxigenic Escherichia coli isolated from infantile diarrheal patients in Papua New Guinea. By hydrophobicity, hemagglutination and bacterial agglutination with antisera against various known adhesins, none of the 9 strains produced known pilus adhesins. Three strains which produce heat-labile and heat-stable enterotoxins may produce a new type of pili which is not hydrophobic and differs from common (type 1) pili.

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