Table 2.
Prevalence and descriptive statistics of aflatoxin B1 (AFB1) in maize collected from farmers’ fields in different districts of Eastern and South Western Kenya and proportion of maize samples with AFB1 levels exceeding maximum tolerable limits set by the East African Community (EAC) and Kenyan authorities.
| Region | District | N | Positive samples |
Aflatoxin concentration range of positive samples (μg kg−1) | Median (μg kg−1) | Mean ± SD (μg kg−1) | Proportion of positive samples exceeding EAC and KEBS regulatory limit (≥5 μg kg−1) |
||
|---|---|---|---|---|---|---|---|---|---|
| N | % | N | % | ||||||
| Eastern | Embu | 89 | 57 | 64.0 | 0.95–9091.8 | 6.25 | 196.3 ± 1202.5 | 34 | 59.6 |
| Machakos | 62 | 38 | 61.3 | 1.3–70.93 | 3.69 | 10.5 ± 16.5 | 15 | 39.5 | |
| Makueni | 265 | 179 | 67.5 | 0.01–1454.8 | 6.90 | 39.0 ± 131.5 | 104 | 58.1 | |
| South Western | Homa Bay | 122 | 68 | 55.7 | 0.98–722.2 | 2.59 | 24.5 ± 94.9 | 21 | 30.9 |
| Kisii | 118 | 90 | 76.3 | 1.0–558.7 | 6.30 | 28.5 ± 72.7 | 49 | 54.4 | |
| Migori | 133 | 75 | 56.4 | 0.98–120.7 | 3.81 | 12.7 ± 24.9 | 32 | 42.7 | |