Pentatrichomonas hominis (Davaine) Wenrich (ATCC® 30098)

Strain Designations: R 51  /  Depositor: R Samuels  /  Biosafety Level: 2

Permits and Restrictions

View Permits

Strain Designations R 51
Biosafety Level 2

Biosafety classification is based on U.S. Public Health Service Guidelines, it is the responsibility of the customer to ensure that their facilities comply with biosafety regulations for their own country.

Bos bovis, Logan, UT, 1960
Product Format frozen
Type Strain no
Morphological study
Complement pathway activation in killing
Homocysteine desulphurase and serine sulphydrase
geographic variation
Medium ATCC® Medium 2154: LYI Entamoeba medium
Growth Conditions
Temperature: 35.0°C
Duration: axenic; anaerobic

1.  Harvest cells from a culture that is at or near peak density by centrifugation at 800 x g for 5 min. The cells grown in a medium containing agar are concentrated by centrifugation, a solid pellet does not form. The soft pellet is re-suspended to desired cell concentration with agar-free supernatant.

2.  Adjust the concentration of cells to 2 x 106 - 107/ml in fresh medium.

3.  While cells are centrifuging prepare a 10% (v/v) solution of sterile DMSO in fresh medium.

a) Add 1.0 ml of DMSO to an ice cold 20 x 150 mm screw-capped test tube;

b) Place the tube on ice and allow the DMSO to solidify (~5 min) and then add 9.0 ml of ice cold medium;

c) Invert several times to dissolve the DMSO;

d) Allow to warm to room temperature.

4.  Mix the cell preparation and the DMSO in equal portions. Thus, the final concentration will be 106 - 107 cells/ml and 5% (v/v) DMSO. The time from the mixing of the cell preparation and DMSO stock solution before the freezing process is begun should no less than 15 min and no longer than 30 min.

5.  Dispense in 0.5 ml aliquots into 1.0 - 2.0 ml sterile plastic screw-capped cryules (special plastic vials for cryopreservation).

6.   Place the vials in a controlled rate freezing unit.  From room temperature cool at -1°C/min to -40°C.  If the freezing unit can compensate for the heat of fusion, maintain rate at        -1°C/min through the heat of fusion.  At -40°C plunge into liquid nitrogen. Alternatively, place the vials in a Nalgene 1°C freezing apparatus.  Place the apparatus at -80°C for 1.5 to 2 hours and then plunge ampules into liquid nitrogen.  (The cooling rate in this apparatus is approximately


7.  The frozen preparations should be stored in either the vapor or liquid phase of a nitrogen refrigerator. Frozen preparations stored below -130°C are stabile indefinitely. Those stored at temperatures above -130°C are progressively less stabile as the storage temperature is elevated. Vials should not be stored above -55°C.

8.   To establish a culture from the frozen state place an ampule in a water bath set at 35°C. Immerse the vial just to a level just above the surface of the frozen material. Do not agitate the vial.

9.   Immediately after thawing, do not leave in the water bath, aseptically remove the contents of the ampule and inoculate a 16 x 125 mm screw-capped test tube containing 13 ml of ATCC medium 2154 adjusted to pH 6.0.

10.          Incubate the culture on a 15° horizontal slant at 35°C.

Name of Depositor R Samuels
Chain of Custody
ATCC <<--R Samuels<<--E.A. Jensen/D.M. Hammond
Year of Origin 1960

Shaio MF, Chen JG. Immunoglobulin M-dependent classical complement pathway activation in killing of Pentatrichomonas hominis. Infect. Immun. 57: 902-906, 1989. PubMed: 2917791

Jensen EA, Hammond DM. A morphological study of trichomonads and related flagellates from the bovine digestive tract. J. Protozool. 11: 386-394, 1964.

Thong KW, Coombs GH. Trichomonas species: homocysteine desulphurase and serine sulphydrase activities. Exp. Parasitol. 63: 143-151, 1987. PubMed: 3494628

Krieger JN, et al. Geographic variation among isolates of Trichomonas vaginalis: demonstration of antigenic heterogeneity by using monoclonal antibodies and the indirect immunofluorescence technique. J. Infect. Dis. 152: 979-984, 1985. PubMed: 2413147

Felleisen RS, et al. Detection of Tritrichomonas foetus by PCR and DNA enzyme immunoassay based on rRNA gene unit sequences. J. Clin. Microbiol. 36: 513-519, 1998. PubMed: 9466768

Felleisen RS. Comparative sequence analysis of 5.8S rRNA genes and internal transcribed spacer (ITS) regions of trichomonadid protozoa. Parasitology 115: 111-119, 1997. PubMed: 10190167

Gookin JL, et al. Single-tube nested PCR for detection of tritrichomonas foetus in feline feces. J. Clin. Microbiol. 40: 4126-4130, 2002. PubMed: 12409385

Levy MG, et al. Tritrichomonas foetus and not Pentatrichomonas hominis is the etiologic agent of feline trichomonal diarrhea. J. Parasitol. 89: 99-104, 2003. PubMed: 12659310

Cross References

Nucleotide (GenBank) : U86616 putative rRNA small subunit gene, partial sequence, putative internal transcribed spacer 1, putative 5.8S rRNA gene, and putative internal transcribed spacer 2, complete sequence, and putative rRNA large subunit gene, partial sequence

Notice: Necessary PermitsPermits

These permits may be required for shipping this product:

  • Customers located in the state of Hawaii will need to contact the Hawaii Department of Agriculture to determine if an Import Permit is required. A copy of the permit or documentation that a permit is not required must be sent to ATCC in advance of shipment.
Basic Documentation