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Table 1 Trypanosoma cruzi infection among Panstrongylus megistus collected in a captive-primate unit at Brasília zoo, Federal District, Brazil: bug characteristics and results of optical microscopy and nested PCR

From: Vector-borne transmission of Trypanosoma cruzi among captive Neotropical primates in a Brazilian zoo

Sex (adults) and stage (nymphs) Optical microscopy Nested PCR
  Testeda Positiveb Tested Positive
Female 12 2 13 11
Male 7 1 7 7
Nymph II 0 - 4 3
Nymph III 8 1 18 16
Nymph V 7 1 8 7
Total 34 5 50 44
  1. a:Bugs that arrived dead and dry to the laboratory could not be tested by optical microscopy
  2. b:Bugs with a positive optical microscopy were all also positive by nested PCR