Table 3 The odds ratio for finding a parasite in specific locations outside built environments in Tingo María versus Andabamba/Marabamba houses

Tingo María

 Any parasites

13

11

20

Latrine vs. entry

1.41 (0.446–4.464)

0.5587

Patio vs. entry

3.297 (1.058–10.276)

*0.0397

Latrine vs. patio

0.428 (0.125–1.466)

0.1766

 Any parasite not including Acanthamoeba

10

8

16

Latrine vs. entry

1.2 (0.368–3.914)

0.7625

Patio vs. entry

2.618 (0.881–7.783)

0.0834

Latrine vs. patio

0.458 (0.141–1.49)

0.1946

 Helminths

4

7

14

Latrine vs. entry

3.025 (0.767–11.932)

0.1139

Patio vs. entry

5.849 (1.64–20.858)

*0.0065

Latrine vs. patio

0.517 (0.158–1.693)

0.2758

 Protozoa

11

11

14

Latrine vs. entry

1.889 (0.591–6.04)

0.2836

Patio vs. entry

1.664 (0.571–4.853)

0.3508

Latrine vs. patio

1.135 (0.356–3.621)

0.8307

 Protozoa not including Acanthamoeba

8

7

10

Latrine vs. entry

1.346 (0.393–4.612)

0.6362

Patio vs. entry

1.471 (0.474–4.563)

0.5045

Latrine vs. patio

0.915 (0.274–3.057)

0.8857

 Acanthamoeba species

4

6

4

Latrine vs. entry

2.571 (0.617–10.708)

0.1944

Patio vs. entry

1.043 (0.233–4.673)

0.9556

 Ancylostoma species

0

1

1

N/A

 Ascaris lumbricoides

1

4

7

Latrine vs. entry

5.002 (0.687–36.395)

0.1119

Patio vs. entry

6.710 (1.027–43.844)

*0.0469

Latrine vs. patio

0.745 (0.190–2.922)

0.6734

 Blastocystis species

6

6

10

Latrine vs. entry

1.552 (0.423–5.688)

0.5074

Patio vs. entry

2.077 (0.637–6.769)

0.2253

Latrine vs. patio

0.747 (0.219–2.549)

0.6414

 Cryptosporidium species

0

0

0

N/A

 Entamoeba histolytica

0

0

0

N/A

 Giardia intestinalis

2

2

0

Latrine vs. entry

5.002 (0.687–36.395)

0.1119

Patio vs. entry

0.193 (0.008–4.449)

0.3039

Latrine vs. patio

0.745 (0.190–2.922)

0.6734

 Necator americanus

0

0

0

N/A

 Strongyloides stercoralis

1

4

5

Latrine vs. entry

2.891 (0.529–15.793)

0.2203

Patio vs. entry

2.591 (0.510–13.170)

0.251

Latrine vs. patio

1.116 (0.267–4.658)

0.8806

 Taenia solium

0

0

0

N/A

 Toxocara canis

0

0

1

N/A

 Trichuris trichiura

1

1

2

Latrine vs. entry

1.410 (0.130–15.329)

0.7777

Patio vs. entry

1.797 (0.213–15.160)

0.5899

Latrine vs. patio

0.785 (0.091–6.772)

0.8254

Andabamba/Marabamba

 Any parasites

11

8

13

Latrine vs. entry

0.95 (0.17–5.305)

0.9536

Patio vs. entry

1.174 (0.244–5.656)

0.8415

Latrine vs. Patio

0.809 (0.148–4.438)

0.8076

 Any parasite not including Acanthamoeba

11

8

9

Latrine vs. entry

0.95 (0.17–5.306)

0.9538

Patio vs. entry

0.437 (0.1–1.91)

0.2714

Latrine vs. patio

2.174 (0.434–10.891)

0.3451

 Helminths

2

0

1

Latrine vs. entry

0.235 (0.009–6.173)

0.3849

Patio vs. entry

0.491 (0.054–4.491)

0.5287

Latrine vs. patio

0.478 (0.016–14.637)

0.6725

 Protozoa

11

8

13

Latrine vs. entry

0.95 (0.17–5.305)

0.9536

Patio vs. entry

1.174 (0.244–5.656)

0.8415

Latrine vs. patio

0.809 (0.148–4.438)

0.8076

 Protozoa not including Acanthamoeba

10

8

9

Latrine vs. entry

1.346 (0.393–4.612)

0.6362

Patio vs, entry

1.471 (0.474–4.563)

0.5045

Latrine vs. patio

2.173 (0.434–10.89)

0.3451

 Acanthamoeba species

1

4

8

Latrine vs. entry

5.799 (0.695–48.424)

0.1045

Patio vs. entry

8.648 (1.194–62.639)

*0.0327

Latrine vs. patio

0.671 (0.143–3.154)

0.6129

 Ancylostoma species

0

0

1

N/A

 Ascaris lumbricoides

1

0

0

N/A

 Blastocystis species

10

8

9

Latrine vs. entry

1.272 (0.237–6.833)

0.7789

Patio vs. entry

0.585 (0.140–2.443)

0.4626

Latrine vs. patio

2.173 (0.434–10.890)

0.3451

 Cryptosporidium species

0

0

0

N/A

 Entamoeba histolytica

0

0

0

N/A

 Giardia intestinalis

1

1

1

Latrine vs. entry

1.381 (0.114–16.679)

0.7996

Patio vs. entry

0.879 (0.076–10.121)

0.9175

Latrine vs. patio

1.571 (0.132–18.767)

0.721

 Necator americanus

0

0

0

N/A

 Strongyloides stercoralis

0

0

0

N/A

 Taenia solium

0

0

0

N/A

 Toxocara canis

1

0

0

N/A

 Trichuris trichiura

1

0

0

N/A