TABLE. Tissue parasitism in the oesophagus and colon of Beagle dogs necropsied in acute or chronic phases from experimental infection with Y or Berenice-78 (Be-78) Trypanosoma cruzi strains.
| Experimental groups | Oesophagus | Colon | ||||||
| Acute phase | Chronic phase | Acute phase | Chronic phase | |||||
| PCR - (%) | PCR + (%) | PCR - (%) | PCR + (%) | PCR - (%) | PCR + (%) | PCR - (%) | PCR + (%) | |
| Y | 25 | 75 | 100 | 50 | 50 | 100 | ||
| Be-78 | 100 | 75 | 25 | 100 | 100 | |||
the results are expressed as percentage of polymerase chain reaction (PCR) + . Animals groups with n = 4.