Seasonal variation of bacterial communities in shellfish harvesting waters: preliminary study before applying phage therapy
1000 | 2015
Pereira, C. | Santos, L. | Silva, A. P. | Silva, Y. J. | Cunha, A. | Romalde, J. L. | Nunes, M. L. | Almeida, A.
The recurrent emergence of infections outbreaks associated with shellfish consumption is an important health problem, which results in substantial economic losses to the seafood industry. Even after depuration, shellfish is still involved in outbreaks caused by pathogenic bacteria, which increases the demand for new efficient strategies to control the shellfish infection transmission. Phage therapy during the shellfish depuration is a promising approach, but its success depends on a detailed understanding of the dynamics of bacterial communities in the harvesting waters. This study intends to evaluate the seasonal dynamics of the overall bacterial communities, disease-causing bacterial populations and bacterial sanitary quality indicators in two authorized harvesting-zones at Ria de Aveiro. During the hot season, the total bacterial community presented high complexity and new prevalent populations of the main shellfish pathogenic bacteria emerged. These results indicate that the spring/ summer season is a critical period during which phage therapy should be applied.
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