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Table 1 Trypanosoma cruzi natural infection in free-living wild mammals of Brazilian biomes: consolidated results showing the total number of non-volant mammalian orders, genera and species examined by blood cultures and serological tests (indirect immunofluorescence test, IFAT)

From: Trypanosoma cruzi transmission in the wild and its most important reservoir hosts in Brazil

Biomes No. of orders No. of genera No. of species HC(+)/ specimens tested (%) [95% CI] IFAT(+)/ specimens tested (%) [95% CI] χ2-valuea P-value
Amazon Forest 7 33 31 90/402 (22)
[18–26]
168/398 (42)
[37–47]
35.968 <0.0001
Atlantic Forest 5 44 53 205/2416 (8)
[7–9]
340/2375 (14)
[12–15]
40.388 <0.0001
Caatinga 5 24 23 99/1005 (10)
[8–11]
225/952 (24)
[20–26]
67.235 <0.0001
Cerrado 7 54 67 47/1973 (2)
[1, 2]
191/1838 (10)
[10–12]
132.321 <0.0001
Pampa 4 10 8 0 15/106 (14) 16.142  
Pantanal 5 27 19 75/791 (9)
[7–11]
155/762 (20)
[17–23]
36.278 <0.0001
Total     516/6587 (8) 1094/6431 (17) 762.23 <0.0001
  1. adf =1
  2. Difference between the rates of animals with positive blood cultures and positive serology among biomes were tested by ANOVA (F = 12.61, P = 0.0075). Comparison between the rates of animals with positive blood cultures and positive serology among biomes using Chi-square test (HC: χ2 = 34.532, df = 5, P < 0.000; IFAT: χ2 = 30.36, df = 5, P < 0.0001).
  3. Abbreviations: CI, confidence interval; HC(+), number of specimens with positive hemocultures; IFAT(+), number of specimens with positive IFAT test