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White spot syndrome (WSS) is a viral infection of penaeid shrimp.The disease is highly lethal and contagious, killing shrimp quickly. Outbreaks of this disease have wiped out the entire populations of many shrimp farms within a few days, in places throughout the world.
Multiple evanescent white dot syndrome occurs mostly in females. Symptoms include a sudden loss of central vision, but patients eventually regain normal vision. The white dots are small and located in the posterior pole at the level of the retinal pigment epithelium. The white dots may disappear after the first few weeks of the disease.
Crustaceans and the virus displays an unusual wide host range serve as natural hosts. There are currently only one species in this family: the type species White spot syndrome virus. Diseases associated with this family include: shrimps: fatal lethargy, white spots. [1] [2
In most cases, when white spots appear on a single or a couple of fingernails or toenails, the most common cause is injury to the base (matrix) of the nail. When this is the case, white spots disappear after around eight months, which is the amount of time the nails take to regrow completely.
The white spots may reach more than 1 mm in diameter and are easily recognized on skin and fins whereas trophonts attached to the gills are hard to see due to the gill cover . Skin: Ich infections are usually visible as one or several characteristic white spots on the body or fins of the fish. The white spots are single cells called trophonts ...
Epizootic ulcerative syndrome (EUS), also known as mycotic granulomatosis (MG) or red spot disease (RSD), is a disease caused by the water mould Aphanomyces invadans. It infects many freshwater and brackish fish species in the Asia-Pacific region and Australia .
Brushfield spots: Thomas Brushfield: ophthalmology, genetics: Downs' syndrome or non-pathological: greyish-white spots at periphery of iris Buerger's test: Leo Buerger: general medicine, surgery: peripheral artery disease: pallor of the leg upon elevation Burton line: Henry Burton: toxicology: lead poisoning: NEJM 354:e21 5/18/06: blue ...
Cryptocaryon irritans is a species of ciliates that parasitizes marine fish, causing marine white spot disease or marine ich (pronounced ick). [ 1 ] [ 2 ] It is one of the most common causes of disease in marine aquaria .