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J Clin Microbiol. 1988 May; 26(5): 948-949

Simple microbiologic detection of Campylobacter pylori.

Francis Blake Bacteriology Laboratories, Massachusetts General Hospital, Boston 02114.

ABSTRACT

A study of 84 gastric biopsies taken from 42 adult patients revealed simple techniques for Gram stain and culture for Campylobacter pylori. In an initial study of 18 biopsies, Gram stains prepared from ground, diluted tissue were all negative for curved, gram-negative rods, whereas 13 of these specimens were positive for C. pylori by culture. The Gram stains for the remaining 66 biopsies were prepared by a rinse-imprint technique. In this group, there were 30 Gram stains positive for organisms resembling C. pylori and 32 positive cultures. By Gram-staining two sites, fundus and antrum, the sensitivity of the Gram stain for identifying a positive specimen increased from 91 to 100%. Gram stain may be the preferred technique for rapid diagnosis. When cultured, C. pylori was recovered most often on modified Thayer-Martin medium incubated microaerophilically at 35 degrees C. The presence of antibiotics in modified Thayer-Martin medium limited upper respiratory flora overgrowth, which was often present on nonselective media.

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