Table 2.
Parasitological, demographic and socio-economic characteristics of the Americaninhas study population (Minas Gerais state, Brazil), at initial survey and at follow-up (a median of 14 months after anthelmintic treatment)
| Initial survey | Reinfection survey | |
|---|---|---|
| N | 1294 | 605 |
| Hookworm infection | ||
| Prevalence, % (n/total) | 70.9% (918/1294) | 29.4% (178/605) |
| egg count, mean, epg a | 1441 | 72 |
| median (interquartile range) a | 198 (0-1080) | 0 (0-12) |
| geometric mean, epg a | 78 | 2.5 |
| Sex, % male (n/total) | 49.5% (641/1294) | 45.8% (277/605) |
| Age, mean, years b | 25.4 (median 17) | 31.1 (median 26) |
| Age, range, years b | 0-95 | 3-87 |
| Households | ||
| Number | 303 | 226 |
| Size, range, people c | 1 to 12 | 1 to 8 |
| Size, mean, people c | 4.3 | 2.7 |
| Toilet, % (n/total) | 49.5% (150/303) | 54.4% (123/226) |
| Crowded d, % (n/total) | 34.7% (105/303) | 36.7% (83/226) |
| NDVI e, mean (SD) | 0.314 (0.166) | 0.289 (0.172) |
a
includes individuals with egg count of zero
b
on sampling date
c
number of phenotyped individuals
d
>1 person/room
e
Normalized Difference Vegetation Index