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Shrimp Virus Diseases

A. HPV virus disease (Hepatopancreatic parvovirus) and MBV (Monodon Baculovirus)
In the year 1988-1990 is a disease highly lethal to tiger prawn shrimp that can cause slow growth. Organs are attacked is hepatopancreas. On a serious attack, hepatopancreas will look pale, shrunken and compact.

B. Viral disease YHD (Yellow Head Disease)
Symptoms of this disease include:
a) The head is yellow,
b) yellow hepatopancreas,
c) The gut is empty because they do not eat.
d) In the third day of the dead reached 100%.

Viruses often infect YHD: P. monodon; Palaemon styliferus and Acetes (kerier); P. merguiensis and Metapenaeus ensis, P. vannamei, P. setiferus, aztecus P., and P. duodarum (experimental). Target organs: the lymphoid organs, hemolimph

C. Disease virus IMNV (Myonecrosis Infectious Virus)
IMNV virus was found in Brazil in 2002. Symptoms in shrimp, among others:
a) Muscle tissue is white opaque
b) The tail with a reddish color like boiled shrimp
c) 40-60% of acute Death

In Indonesia found at the end of May 2006 in the area of Situbondo, East Java. Disease attack on a large shrimp aged 60-80 days. Generally appetite remains high, there is a gradual death. So that feed on anco always exhausted. But over time tends to decrease because there is a reduction in the population. Myo often goes undetected while still juveniles. Up until now, has never been found positive for Myo sample fry.

D. White Spot Baculovirus (WSBV)
The virus attacks the tiger shrimp P.monodon and P.merguiensis in Java, Bali, Lampung, North Sumatra, Aceh and South Sulawesi from 1994 until now and attack the shrimp size 50-60 days 5-15 grams. Reached 100 percent mortality within 3-5 days. The disease causes a great loss in the national shrimp industry, thereby drastically lowering the production of shrimp.

Morphology WSBV Indonesia strain is a rod-shaped, no extension tail-like projection at one end. The normal size is between 78-90nm WSBV nucleocapsid (diameter) and 330-350 nm (long) and found abundant in the nucleus and cytoplasm swelling. The virus is not resistant to heat, grease and low pH. Viral disease has resulted in substantial losses among farmers. The spread of the disease occurs rapidly and hit the region in a very short time.