First report of Enterobacter soli associated with gastro-hepato infection of farmed fish, Channa striatain Malaysia

Abstract

The freshwater snakehead fish Channa striata is extensively distributed across tropical Africa and Asia. This fish becomes an important commodity in the aquaculture business that has been industrialized very fast over the last ten years. However, diseases brought economic loss to the industry estimated to be in billions. Although wild Channa striata are known to be highly resistant to diseases, the case under captivity may be different. For instance, an occurrence of selective mortality was found in a farm of Channa striata in Selangor, Malaysia. The etiology of the infection was attributed to a bacterium that belong to Enterobacteriaceae family. This family is known to be widely distributed in nature and was previously found to be involved in mortality of different fish species. Accordingly, 16S rRNA gene sequencing was used to identify bacteria isolated from skin and liver of moribund fish; the present research confirmed that the causative disease agent had been Enterobacter soli. To our best knowledge, it is the first to report this bacterium species as a disease causative agent in fish. Furthermore, clinical and histopathological changes of healthy fish samples were followed up applying the Koch's procedure.

Plasmid characterization in bacterial isolates of public health relevance in a tertiary healthcare facility in Kilimanjaro, Tanzania

“…The study findings are consistent with other studies conducted in Canada, Greece and Mexico [24][25][26]. Interestingly, the study observed other low plasmid prevalence species that were reported elsewhere in soil samples, fish flesh samples [27][28][29] and pigeon flesh specimens [30] such as Micrococcus sp. Kbs0714, Enterobacter soli and Proteus columbae.…”

Plasmid characterization in bacterial isolates of public health relevance in a tertiary healthcare facility in Kilimanjaro region, Tanzania

“…The study findings are consistent with other studies conducted in Canada, Greece, and Mexico [24][25][26] . Interestingly, the study observed other low plasmid replicon prevalence species that were reported elsewhere in soil samples, fish flesh samples [27][28][29] , and pigeon flesh specimens [30] , such as Micrococcus sp. Kbs0714, Enterobacter soli and Proteus columbae .…”

Characterization of plasmids in bacterial isolates in a tertiary health care facility in Kilimanjaro region, Tanzania

“…The study findings are consistent with other studies conducted in Canada, Greece and Mexico (Boyd et al, 2020;Rodríguez-Medina et al, 2019;Tsakris et al, 2011) where these microbes had low plasmid prevalence. Also, the study revealed low plasmid prevalence species that were reported elsewhere in soil, fish and pigeon samples (Bhassu et al, 2019;Dai et al, 2018;Manter et al, 2011) which are Micrococcus sp. Kbs0714, Enterobacter soli and Proteus columbae.…”