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Hematological changes in white spot syndrome virus-infected shrimp, Fenneropenaeus chinensis (Osbeck)

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Abstract

The pathological changes of hemocytes in the haemolymph and hepatopancreas were examined in experimentally and naturally WSSV (white spot syndrome virus) infected Fenneropenaeus chinensis. The results showed that the pathological manifestations of hemocytes were similar among moribund shrimps infected via injection, feeding and by nature. Firstly, the total hemocyte counts (THCs) in WSSV-infected shrimp were significantly lower than those in healthy shrimp. Secondly, necrotic, broken and disintegrated cells were often observed, and a typical hematolysis was present in the haemolymph smear of WSSV-infected shrimp. Thirdly, necrosis and typical apoptosis of hemocytes were detected with TEM in the peripheral haemolymph of WSSV-infected shrimp. Hyalinocytes and semi-granulocytes with masses of WSSVs in their nuclei often appeared, whereas no granular hemocytes with WSSV were found in the hepatopancreas of moribund infected shrimps. All our results supported that hemocytes were the main target cells of WSSV, and hyalinocytes and semigranular hemocytes seemed to be more favorable for WSSV infection in F. chinensis.

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Correspondence to Wenbin Zhan.

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Feng, S., Zhan, W., Xing, J. et al. Hematological changes in white spot syndrome virus-infected shrimp, Fenneropenaeus chinensis (Osbeck). J. Ocean Univ. China 7, 287–293 (2008). https://doi.org/10.1007/s11802-008-0287-7

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  • DOI: https://doi.org/10.1007/s11802-008-0287-7

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