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ROBERT S. DAUM, MD
Tulane University Medical Center Department of Pediatrics 1430 Tulane Ave New Orleans, LA 70112

Am J Dis Child. 1985;139(2):114.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

Sir.—Your commentary¹ states that "Ampicillin resistance has been demonstrated in nontype b strains although at a much lower level than that observed by type b organisms." The reference to Long et al² is provided to support that statement. I believe this is an incorrect statement and that the cited reference does not support it. The study of Long et al² documents a 10.5% resistance rate for Haemophilus influenzae serotype b, 8.3% rate for nontype b, and 17.7% rate for nontypeable strains. I pooled the data for the last two groups and compared the proportion of ampicillin resistance to that observed among the type b isolates. By x² analysis, the P value is.10. Thus, although the data given do not support a significant difference in rate of ampicillin resistance between type b and other strains, there is a trend toward a higher rate in the nontype . . . [Full Text PDF of this Article]

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