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Journal of Experimental Biology 56,19-29 (1972)
Published by Company of Biologists 1972

The Growth of Moniliformis Dubius (Acanthocephala) in the Intestine of Male Rats

D. W. T.CROMPTON ¹

¹ The Molteno Institute, University of Cambridge

1. The growth of male and female Moniliformis dubius has been defined by measuring the protein nitrogen, DNA and RNA content of the parasites during the course of the infection in male rats.

2. Details of the extraction and analytical procedure are described.

3. The growth of worms of both sexes is similar until after copulation, when female worms grow at a greater rate than males.

4. Large natural variations occur in the nitrogen, DNA and RNA content of individual fertilized female worms.

5. In fertilized female worms, the eggs contain about 28% of the nitrogen, 80% of the DNA and 38% of the RNA.

6. Evidence for the presence of DNA in the eggs was obtained by means of paper chromatography.