Estudo epidemiológico de enfermidades infecciosas em camarões marinhos cultivados

Abstract

Shrimp farm can be affected both by non-infectious diseases caused by abiotic agents, as for infectious diseases, and among these viral diseases were responsible for the largest losses in shrimp farming. Small and medium shrimp were collected from four commercial farms in the coastal state of Pernambuco, in the periods of summer and rainy, with the aim to investigate the frequency of diseases in these animals, with the aim to investigate the frequency of diseases in these animals. The investigation of viruses Infectious myonecrosis (IMNV), and Infectious Hipodermal and Hematopoietic Necrosis (IHHNV) and White Spot Syndrome (WSSV) was performed by macroscopic analysis, using wet mount, microscopically for histopathology, and analysis molecular (Polymerase Chain Reaction - PCR and nested PCR), identifying the presence or absence of etiological agents. Viruses causing IHHNV IMNV and were detected as lesions suggestive of these infections were more frequent during the dry season. WSS virus was not detected by nested PCR in the specimens, as well as injuries that just allowed the suspected virus circulation during the study period. Lesions suggestive of bacterial diseases, enteritis hemocitical, as well as the presence of protozoa and epicomensais gregarines were observed in the shrimp examined. Infectious diseases affecting the shrimp are complex events and the continuous and accurate records of the farms are essential for epidemiological studies. These, identifying risk factors and involving them in the analysis are essential to maintain and monitor the health of animals and for the good productivity of crops.