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Karl John Karnaky, M.D.
JAMA. 1955;157(13):1155. doi:10.1001/jama.1955.02950300083026.
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To the Editor:—  I read with interest the article by C. H. Davis on Trichomonas vaginalis in The Journal, Jan. 8, 1955, page 126, since I have been experimenting with T. vaginalis and T. vaginitis since 1932.I have found that the use of a nonlubricated vaginal speculum to scrape off the secretion from the vaginal walls and this secretion removed from the speculum with two cotton applicators is better for the diagnosis of trichomonads. In reply to the statements "Having decided against the further use of acid preparations" and "vinegar douche with a pH of produced no visible effect on T. vaginalis," by detailed electronic pH recordings it was found that the normal vaginal pH was from 3.5 to 4.2, which is decidedly acid. If acids are not as good as alkaline preparations then one might assume that the normal very acid vagina might be abnormal; also, I have inoculated


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