A Review: Factors Affecting Outbreaks of Saprolegniosis on Aquatic Animals
A Review: Factors Affecting Outbreaks of Saprolegniosis on Aquatic Animals
Date
2018
Authors
Duan, J.
Feng, Y. Huang, X.
Wang, K.
Geng, Y.
Deng, Y.
Ou, Y.
Chen, D.
Yang, S
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Abstract
In this paper, we review the current knowledge regarding factors affecting the
outbreaks of saprolegniosis. Saprolegniosis is a serious disease which can
cause significant economic losses in aquaculture. Oomycetes are considered
to be responsible for the disease. Outbreaks of saprolegniosis occur when
equilibrium between pathogenic oomycetes and host resistance is disturbed.
This may be the result of an increase in numbers or virulence of the zoospores
of oomycetes in the water, or an increase in the susceptibility of the host. The
presence of oomycetes zoospores in the environment is regarded as one of
the most important causes of saprolegniosis. However, important differences
have been found between plant and animal pathogenic oomycetes and appear
to be related not only to tactic responses to environment, but also to infection
strategies to a host. In addition, fish are more susceptible to infection by
pathogenic oomycetes when physically injured, stressed or infected.
Furthermore, water environmental factors, such as temperature, salinity, and
microorganisms, should be carefully considered since they play a key role in
the outbreaks of saprolegniosis.
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Keywords
oomycetes,
saprolegniosis,
polyplanetism,
effector proteins,
water temperature,
Fish culture--Israel.,
Fish culture
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11 pages
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