250 TRICHOMONAS INTESTINALIS. 



Nothing is known regarding the reproductive process, for though 

 Hennig mentions having seen two animals hanging firmly together by 

 their tails, and interprets the process as an act of copulation, it might 

 very probably merely represent the result of division. 



Donnd, who first discovered these parasites in women suffering 

 from gonorrhoea, thought for some time that he could attribute a 

 diagnostic value to them, but afterwards convinced himself that they 

 occurred quite as frequently in uninfected persons. In quite normal 

 vaginal mucus, containing only separated epithelial cells, but no mucus 

 nor pus corpuscles, the parasites indeed appear to be absent. But in 

 increased secretion, especially of the mouth of the womb and upper 

 part of the vagina, they become quite frequent, and are the more 

 likely to occur when the secretion gives a strongly acid reaction, 

 is of a creamy nature, and rich in pus corpuscles. Kolhker and 

 Scanzoni found these parasites in the majority of persons whom they 

 examined, and during pregnancy as well as at other times. Haus- 

 mann mentions that he found them thirty-seven times in two hundred 

 pregnant women, and forty times in one hundred not pregnant. In 

 the secretion of the cervix, which differs both chemically and histolo- 

 gically from the vaginal mucus, Trichomonas is never found. 



TridLomonas intestinalis, Leuckart. 



Marchand, Archiv f. pathol. Anat., Bd. Ixiv., p. 294 {Cercomonas intestinalis), 1875. 

 Zunker, Zeitschr. /. pract. Medicin, No. 1, p. 1, 1878 (pro parte). 



This species resembles the above in size, form, and in the possession 



of a tail, but is destitute of flagella (J). The ciliary comb is distinctly 



developed, and seems to consist, as the accompany- 



f rf ing illustration sJwws, of at least twelve hairs 



m (^- 126.) 



I think I am not mistaken in referring 

 to the genus Trichomonas yet another Infu- 

 Fia. 126 —Trickomonas in- sorian form,' which was first found by 



<e«<WMMM (after Zunker). ,, , i.,, ,, n. i i-i 



Marchand m the stools of a typhus patient, 

 and afterwards by Zunker in severe intestinal disease, but was looked 

 upon by both as a Cercomonas. It is true that neither of the two 

 observers mentions the flagellum, which must be regarded as a 

 characteristic mark of Trichomonas; but it is probable that they 



' Stein wished also (p. 40) to claim the Cercomonas intestinalis, first found by Lambl 

 in the small intestine of a child, as a Trichotrwnas, but Lambl himself fterwarda estab- 

 lished its identity with the Cercomonas from the Echinococcus-tmnowc, so that it is a 

 genuine Cercomonas. 



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