The Morphology and Method of Division of Trichomonas

  title={The Morphology and Method of Division of Trichomonas},
  author={Ann Bishop},
  pages={129 - 156}
  • A. Bishop
  • Published 1 April 1931
  • Biology
  • Parasitology
1. Three trichomonads have been cultivated and studied, T. hominis, Trichomonas sp. from M. nemestrinus (= R.T. strain), and T. batrachorum from English frogs and toads. 2. A number of strains of T. batrachorum were cultivated over periods varying from two weeks to five months without the appearance of a Eutrichomastix stage. 3. The division process of T. batrachorum has been studied. The new basal fibre arises as an outgrowth from the blepharoplast. The old axostyle is absorbed and new ones… 

Observations on the Flagellates of the Genera Trichomonas and Eutrichomastix

It can be definitely concluded that Trichomonas and Eutrichomastix are generically distinct.

A Description of Embadomonas n.spp. from Blatta orientalis, Rana temporaria, Bufo vulgaris, Salamandra maculosa; with a Note upon the “Cyst” of Trichomonas batrachorum

Embadomonas blattae a new species from the hind gut of Blatta orientalis is described, differs from other known species of this flagellate in shape, and in absence of a definite karyosome, and is proposed to call E. dobelli.

Researches on the intestinal protozoa of monkeys and man

Consideration of its cytology and development leads to the conclusion that D. fragilis is not a true amoeba but an aberrant flagellate closely related to Histomonas, and its morphology and life-history are described and illustrated.

The Experimental Infection of Amphibia with Cultures of Trichomonas

It is concluded therefore that Trichomonas batrachorum in frogs and toads is one true species.

Pseudocysts in trichomonads--new insights.

Evidence is presented that the trichomonad pseudocysts appear under stress conditions and that they are competent to divide.

Observations upon a “Trichomonas” from Pond Water

1. “Trichomonas” keilini n.sp. has three anterior flagella, and a short undulating membrane, whose bordering flagellum does not become free. The flagella arise from an anterior blepharoplast. There

Researches on the intestinal Protozoa of monkeys and man

It is demonstrated conclusively that, although the aerobic bacteria individually induced the cysts of E. histolytica to hatch and supported the growth of the amoebae indefinitely, only one species—the anaerobe N5—was capable of promoting encystation.

A note upon the systematic position of “Trichomonas” keilini (Bishop, 1935)

In 1935 I described a free-living flagellate, which bore a striking resemblance to the genus Trichomonas, and was obtained, on four different occasions during a period of 12 months, from a pond in

Histomonas meleagridis in domestic fowls (Gallus gallus). Cultivation and experimental infection

This strain, although isolated from the liver lesions of a hen suffering from acute blackhead, showed no abnormal virulence in chicks, and the method of nuclear division was similar to that of Trichomonas.




It has been shown that it is not strictly a trichomonas and that it should be classed under the subgenus Tetratrichomonas, and further cultural studies in the morphology and biology of these organisms must be carried out in order to solve these problems.

The Cultivation of Trichomonas Hominis

According to Kofoid's (1920) recent review of the nomenclature of the flagellates, Ohira and Noguchi were working with Trichomonas buccalis and cultured it on a mixture of ascitic fluid and Ringer's solution, using equal portions and found that it gave much better results than Lynch's bouillon medium.

On the Cultivation of Entamoeba histolytica and some other Entozoic Amoebae

Methods by which cultures of entozoic amoebae can be initiated from encysted forms have been discovered and are described, and some indications are given for the isolation of pure strains from mixed cultures.

Studies on Tricercomonas intestinalis (Wenyon and O'Connor, 1917).

The validity of the genus and species of Tricercomonas intestinalis as separate and distinct from that of Enteromonas hominis is established.

Researches on the Intestinal Protozoa of Monkeys and Man. I. General Introduction, and II. Description of the whole Life-History of Entamoeba histolytica in Cultures

The 4-nucleate excysted (metacystic) amoeba has been found to produce a new generation of trophic forms by a complicated series of nuclear and cytoplasmic divisions, which are described in detail for the first time.

The Action of Hydrochloric Acid upon Cultures of Trichomonas

The question of the mode of transmission of the Trichomonas of man from one host to another is of particular interest because no authentic encysted stage is known. Many workers have attempted to


The intestines of twenty ground squirrels (Citellus tridecemlineatus) were examined for protozoa. The following species of protozoa were found to be present: Giardia sp.?, Endamaeba citelli,

The Diagnosis of Intestinal Flagellates by Culture Methods.

The study of the feces of thousands of persons during the past few years has indicated infection with Chiloniastix mesnili in about 4 per cent. of cases and with Trichomonas hominis in about 3 per

Morphological Studies on Trichomonas.

In the course of the work the descriptions of a number ofspecies have been verified in some instances and corrected or amplified in others, and new species have been described from the rabbit, kangaroo, screech owls, grouse, and beetle.

The Intestinal Protozoa of Man

This treatise is distinguished by that patient inquiry into previous work and critical judgment as to nomenclature and synonomy which have rendered Mr. Dobell's earlier publications of special value.