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The presence of diseases caused by virus and bacteria pose a threat to the capture and commercialization of shrimp, and may cause significant economic damage. Nocturnal monthly sampling were conducted to detect the presence of IHHNV, WSSV, and NHP in San Andres Lagoon in Tamaulipas, Mexico, an important coastal ecosystem due to its shrimp fishery and the existence of shrimp farms in the area. Polymerase chain reaction (PCR) analysis in the shrimp tissue did not detect the presence of IHHNV, however, WSSV was detected, as well as NHP during July and August, when low salinities and high temperatures were recorded. [ABSTRACT FROM AUTHOR]

Shrimp is one of the main aquaculture species in the world. Different viruses affect them, which causes serious mortality to economically important species, such as Penaeus monodon, Litopenaeus vannamei and L. stylirostris, among others. White spot syndrome virus or WSSV is a highly lethal, stress-dependent virus, which belongs to the family Nimaviridae, genus Whispovirus. Three WSSV virus isolates were first detected in 1992 in Thailand, Taiwan and China. Later, a fourth isolate of the virus was detected in the Americas in 1999. This virus has a large circular double-stranded DNA genome with different sizes (292.9–307.2 kb), where the diverse isolates show differences in virulence. This virus infects a wide range of aquatic crustaceans by vertical and horizontal transmission, with different mortality results. The spread of infection between regions may be due to infected shrimp and carriers such as other crustaceans, seabirds, aquatic arthropods or other vectors. The aim of this work is to describe the current knowledge on the status, transmission, pathology, isolation, control and genomic characteristics of WSSV. [ABSTRACT FROM AUTHOR]

Bioassays were carried out in a closed system to evaluate the susceptibility of Litopenaeus schmitti and Cherax quadricarinatus to white spot syndrome virus (WSSV) using L. vannamei as the positive control reference species. Animals were injected intramuscularly (20 μL shrimp-1) with a WSSV preparation obtained from the Aquaculture Pathology Laboratory of the University of Arizona. These infected organisms were reared separately in their respective experimental tank. Susceptibility to WSSV was significantly greater in L. vannamei than in the other two species (P < 0.05). The histological analysis showed characteristic inclusion bodies of WSSV in these three crustacean species, with a different distribution of infection depending on the tissue and species. In situ hybridization also showed these signs of infection in hemocytes and hepatopancreas. [ABSTRACT FROM AUTHOR]