Swartz S L, Kraus S J
J Infect Dis. 1979 Oct;140(4):614-7. doi: 10.1093/infdis/140.4.614.
Chlamydia trachomatis was isolated from 47% of asymptomatic, sexually active men whose urethral smears contained four or more polymorphonuclear leukocytes (PMN) per high-power field (hpf) one week after their sexual activity was restricted. C. trachomatis was not detected in any of 23 asymptomatic, sexually active men having less than 4 PMN/hpf in two urethral smears obtained one week apart. Semiquantitation of urethral PMN in the urethral Gram-stained smear is useful in the evaluation of asymptomatic men without gonorrhea who are concerned about the possibility of harboring a urethral pathogen.
在性活动受限一周后，从47%无症状、有性活动的男性中分离出沙眼衣原体，这些男性尿道涂片每高倍视野（hpf）含四个或更多多形核白细胞（PMN）。在23名无症状、有性活动的男性中，相隔一周采集的两份尿道涂片每hpf均少于4个PMN，未检测到沙眼衣原体。对尿道革兰氏染色涂片中的尿道PMN进行半定量，有助于评估无淋病、担心携带尿道病原体的无症状男性。
