Table 3.
Enterotoxigenic genes detected in B. cereus (n = 19) isolates
| Type of products (na/Nb) | Isolates positive for hbl gene (%) | Isolates positive for nhe gene (%) |
cytK n (%) |
||||
|---|---|---|---|---|---|---|---|
|
hblA n (%) |
hblC n (%) |
hblD n (%) |
nheA n (%) |
nheB n (%) |
nheC n (%) |
||
| Chicken momo (1/25)c | 0 (0.0) | 0 (0.0) | 0 (0.0) | 1 (4.0) | 1(4.0) | 1(4.0) | 0 (0.0) |
| Paneer based (2/23) | 0 (0.0) | 2 (8.7) | 0 (0.0) | 1 (4.3) | 2 (8.7) | 2(8.7) | 1(4.3) |
| Khoa based (3/21) | 0 (0.0) | 1 (4.8) | 0 (0.0) | 3 (14.3) | 3 (14.3) | 3(14.3) | 2 (9.5) |
| Cheese based (4/16) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 2 (12.5) | 4 (25.0) | 4 (25.0) | 2 (12.5) |
| Cream based (1/12) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 1 (8.3) | 1 (8.3) | 0 (0.0) |
| Milk beveragesd (2/19) | 0 (0.0) | 2 (10.5) | 0 (0.0) | 1 (5.3) | 2 (10.5) | 2 (10.5) | 2 (10.5) |
| Vegetable soup (1/6) | 0 (0.0) | 1 (16.7) | 0 (0.0) | 0 (0.0) | 1 (16.7) | 1(16.7) | 0 (0.0) |
| Water (5/60) | 0 (0.0) | 1 (1.7) | 0 (0.0) | 3 (5.0) | 4 (6.7) | 5 (8.3) | 3 (5.0) |
| Total | 0 (0.0) | 7 | 0 (0.0) | 11 | 18 | 19 | 10 |
None of the B. alvei (n = 3), B. polymyxa (n = 2) and B. firmus (n = 1) were carrying any of the enterotoxin encoding gene
Values in bold indicate significant association (p ≤ 0.05)
aNumber of samples positive for one or more one type of B. cereus enterotoxins
bTotal number of samples tested for type of food product
cNo B. cereus isolate was detected in mutton momo (n = 15), curd (n = 8) and chicken soup (n = 15) samples (refer Table 2)
dMilk beverages included lassi (n = 10) and milk shake (n = 9) samples