Chromosome numbers of Tritrichomonas foetus and Tritrichomonas suis

Tritrichomonas foetus and Tritrichomonas suis isolates were cultivated axenically in Diamond's medium. Studies on the chromosome numbers of these two species with a light microscope were done by adding different concentrations of colchicine into the medium, incubating at 37 degrees C for 6-8 h and using a hypotonic swelling technique. The diploid chromosome numbers of both T. foetus and T. suis were 2n=10.