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November 26, 1960


Author Affiliations

Karachi Health Department Karachi, Pakistan.

JAMA. 1960;174(13):1755. doi:10.1001/jama.1960.03030130083031

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The above comment was referred to the author of the article, and he has submitted the following reply.

To the Editor:—  Thank you for sending me the letter from Dr. Price. Details of serologic identification of strains of Esch. coli serotypes isolated from household pets was intentionally omitted from the article in question. The bacteriological methods described in the article are primarily given for the guidance of hospital and small public health laboratories which may, after confirmation of O group antigens, forward the culture to a state or regional health department laboratory where final identification may be carried out. Complete serologic identification of Esch. coli serotypes isolated from household pets was done during the study.The O antigens of cultures that belong to Esch. coli O group 55 are not related significantly to those of other Esch. coli O antigens, but the O group has been subdivided. For accurate epidemiologic

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