Mailed specimens were exposed to longer transport times and elevated temperatures; despite this, 99% of the results using courier specimens agreed with the mailed specimen results. Eighty-eight women tested positive and 891 women tested negative for chlamydia on both specimens. When the 11 specimens with discrepant results were retested by polymerase chain reaction, 10 were positive for chlamydia, with 9 concurring with the mailed specimen results. Results of specimens in this study were not adversely affected by heat and extended transit times when transported by U.S. Mail.
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