Monday, 16 May 2016

Post 10: Glugeosis

Glugeosis is a marine and freshwater parasitic disease and is well documented in Japanese aquaculture and reported outbreaks in North America. The main causative agent of glugeosis disease is microsporidian parasites in the Glugea genus (Koesharyani et al 2005).

In 1998, a private hatchery in Indonesia culturing juvenile barramundi found that in the early stages of infection, fish exhibited lethargic swimming and a disinterest in food (Koesharyani et al 2005). The longer a fish goes infected, the easier it is to externally diagnose, with heavily infected fish exhibiting a cripplingly swollen abdomen, the cause of which are white cysts ranging in diameter from 0.5-1.5 mm, growing inside the fish (Zafran et al 1998). If left untreated, the cysts may multiply until the abdomen bursts or the fish starves to death (Zafran et al 1998).

An effective treatment for glugeosis disease is administering copper sulfate into the water body. Prevention of glugeosis in an aquaculture setting is to reduce the stocking density and to maintain good water quality, however research shows that infections have occurred mostly due to live shrimp being fed to fish. This suggests oral transmission of the parasite (Koesharyani et al), therefore decent food supervision should decrease infection rates.

numerous white cysts in the abdomen of fish infected with glugeosis



References:

Koesharyani, I. Roza, D. Mahardika, K. Johnny, F. Zafran, A. Yuasa, K 2005, ‘Manual for Fish Disease Diagnosis – II’, ‘Japan International Cooperation Agency’


Zafran, A. Rosa, D. Koesharyani, I. Johnny, F. Youssa, K 1998, ‘Manual for Fish Diseases Diagnosis’, ‘Japan International Cooperation Agency’

2 comments:

  1. Ouch! That looks extremely painful! Thank you for your entertaining and enlightening blogs about aquatic parasites and pathogens. I’ve certainly learned a great deal about an area I have no background knowledge in!

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