Table 1 Listeria spp. in the fish and fisheries environment of tropical area of Kerala, India, based on types of samples
From: Isolation and characterization of Listeria monocytogenes from tropical seafood of Kerala, India
Type of samples | Number of samples screened (n) | Positive for Listeria spp. | Positive for L. monocytogenes | Positive for L. innocua |
|---|---|---|---|---|
Marine finfish | 140 | 42 (30 %) | 2 (1.4 %) | 41 (29.3 %) |
Freshwater finfish | 33 | 12 (36.4 %) | 1 (3 %) | 12 (36.4 %) |
Prawn | 28 | 7 (25 %) | 0 | 7(25 %) |
Clams and mussels | 31 | 7 (22.6 %) | 0 | 7 (22.6 %) |
Fishery environments | 69 | 20 (29 %) | 1 (1.4 %) | 19 (27.5 %) |
Crab | 23 | 7 (30.4 %) | 0 | 7 (30.4 %) |
Total | 324 | 95 (29.3 %) | 4 (1.2 %) | 93 (28.7 %) |
Listeria spp. in fresh, frozen and dry fish samples | ||||
Fresh fish | 198 | 64 (32.3 %) | 3 (1.26 %) | 63 (28.9 %) |
Dry fish | 20 | 1 (5 %) | 0 | 1 (5 %) |
Frozen fish | 37 | 10 (27.1 %) | 0 | 10 (25.6 %) |
Total | 255 | 75 (29.4 %) | 3 (1.2 %) | 74 (29 %) |
Listeria spp. in fishery environment | ||||
Ice | 40 | 12 (30 %) | 1 (2.5 %) | 11 (27.5 %) |
Mud and sand | 22 | 8 (36.4 %) | 0 | 8 (36.4 %) |
Seawater | 5 | 0 | 0 | 0 |
Water hyacinth | 2 | 0 | 0 | 0 |
Total | 69 | 20 (29 %) | 1 (1.4 %) | 19 (27.5 %) |