Table 1 The number and proportion of samples positive for Gram-negative bacteria species among water (N = 24) and live fish (N = 210) samples collected from Lakes Hawassa, Langanoo and Ziway, and processed fish samples (N = 210) from Batu town

A. sobria

1(5.9)

3(2.4)

0(0.0)

4(2.6)

C. freundii

1(5.9)

3(2.4)

0(0.0)

4(2.6)

C. koseri

1(5.9)

3(2.4)

0(0.0)

4(2.6)

E. tarda

2(11.8)

10(8.1)

0(0.0)

12(7.8)

E. aerogenes

0(0.0)

4(3.2)

1(7.7)

5(3.2)

E. cloacae

0(0.0)

5(4.0)

0(0.0)

5(3.2)

E. coli

1(5.9)

12(9.7)

2(15.4)

15(9.7)

K. pneumoniae

1(5.9)

4(3.2)

2(15.4)

7(4.5)

P. shigelloides

0(0.0)

3(2.4)

0(0.0)

3(1.9)

P. aeruginosa

1(5.9)

4(3.2)

0(0.0)

5(3.2)

S. paratyphi

1(5.9)

7(5.6)

2(15.4)

10(6.5)

S. typhi

0(0.0)

7(5.6)

2(15.4)

9(5.8)

S. dysenteriae

1(5.9)

6(4.8)

0(0.0)

7(4.5)

S. flexneri

1(5.9)

6(4.8)

0(0.0)

7(4.5)

V. parahemolyticus

1(5.9)

4(3.2)

0(0.0)

5(3.2)

Total

12(50)

82(39.1)

9(45)

< 0.0001