Volume 2, Issue 1
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



A study was made of 100 human diaphragms in Mexico City to determine the incidence and degree of infection with .

Direct microscopic examination of samples weighing 50 gm. or more revealed a very high incidence (15 per cent) of low grade infections. Twelve of the 15 positive cases showed less than 1 cyst per gm. of tissue, while 9 showed less than 1 cyst per 10 gm. of tissue.

Xenodiagnosis, using albino rats, was used to detect viability in the positive cases. This method is proposed as a means of detecting all cases having viable larvae in future survey work.


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