Research Article

Identifying Bacteria with Public Health Significance from Farmed Nile Tilapia (Oreochromis niloticus), Zambia

Table 3

Biochemical characteristics of bacterial isolates isolated from tilapia (Oreochromis niloticus) and water samples from farms A, B, and C.

Bacterial isolatesTests conducted
GMCMHOxCatEscGalRafSalMalXylManTreInuSorLacUreaGluSuclacgH2SCitsulmotIndMR

Acinetobacter spp.Rodsβ+++
Aequorivita spp.Rods++
Aerococcus spp.+Cocciα+++++++++++++++
Aeromonas spp.Rodsβ++++++++++
Bacillus spp.+Rodsβ+++
Bordetella spp.Rods+++++++
Carnobacterium spp.+Rodsα
Citrobacter spp.Rods+++++
Clostridium spp.+Cocci++
Corynebacterium spp.+Rodsβ++
Dermatophilus spp.+Cocciβ+++++
Enterococcus spp.+Cocci+++
Escherichia coli spp.Rods+++++++++++++++
Flavobacterium spp.Rods+++++++++++
Klebsiella spp.+Rods+++++++++++++++++
Lactococcus spp.+Cocciα+++++++
Lactococcus/Streptococcus spp.+Cocci++++++
Listeria spp.+Rods+++++++++++
Micrococcus spp.+Cocci++
Planococcus spp.+Cocci++++++
Proteus spp.Rods++++++++++++
Pseudomonas spp.Rods++++
Rhodococcus spp.+Rods++
Shewanella spp.Rodsβ+++++++
Staphylococcus spp.+Cocciβ++++++++++++
Streptococcus spp.+Cocciβ+++++
Vagococcus spp.+Cocciα++++
Unidentified 1+Cocci++++++++
Unidentified 2+Rods+++++++++++
Unidentified 3+Cocci++++++++++++-
Unidentified 4Rods+++-
Unidentified 5+Cocci+-
Unidentified 6+Cocci++++++++++
Unidentified 7Cocci+++
Unidentified 8+Rods+++++-
Unidentified 9+Cocci++-

GM = Gram stain, CM = cell morphology, H = hemolysis, Cat = catalase, Ox = oxidase, Esc = esculin, Gal = galactose, Raf = raffinose, Sal = salicin, Mal = maltose monohydrate, Xyl = xylose, Man = mannitol, Tre = trehalose, Inu = inulin, Sor = sorbitol, Lac = lactose monohydrate, Urea = urease, Glu = glucose, Suc = = sucrose, lac = lactose, g = gas production, H2S = production of hydrogen sulphide, Cit = citrate, Sul = sulphur, Mot = motility, Ind = indole, and MR = methyl red.