In the issue, we will cover some of the facts of two of the aquatic diseases - #10 Monodon Baculovirus (MBV) and #9 Shrimp Hemocyte Iridescent Virus (SHIV).
4. Monodon Baculovirus (MBV)
Rajendran et al (2012)
Arrow indicates the
characteristic eosinophilic
multiple inclusions of MBV
#10
Susceptible Species
Penaeusmonodon
P.indicus,P.penicillatus,P.merguiensis,P.
kerathurus,P.semisulcatus
Litopenaeusvannamei
Metapenaeusensis
M.lysianassa,M.monoceroros,M.elegans
Macrobrachiumrosenbergii
Is it OIE-listed? No
04
5. Monodon Baculovirus (MBV)
Rajendran et al (2012)
Arrow indicates the
characteristic eosinophilic
multiple inclusions of MBV
#10
Susceptible Stages
All life stages, except eggs and nauplii
Effect of MBV Infection
Increase the susceptibility of shrimp to
secondary infection
Significant mortalities in late larval
(Protozoea & mysis) and early PL stages
May suppress growth rate, result in
reduced survival, and reduce overall
culture performance 05
6. Monodon Baculovirus (MBV)
Rajendran et al (2012)
Arrow indicates the
characteristic eosinophilic
multiple inclusions of MBV
Rajendran et al (2012)
Arrow indicates the
characteristic eosinophilic
multiple inclusions of MBV
#10
Special Note
MBV infections are apparently well-
Ensure culture conditions are optimal
tolerated by shrimp unless they are
severely stress.
06
7. Rajendran et al (2012)
Arrow indicates the
characteristic eosinophilic
multiple inclusions of MBV
References
OIE Manual of Diagnostic Tests for Aquatic
Animals, 2019, Chapter 2.2.10. - Spherical
baculovirosis (Penaeus monodon-type
baculovirus)
Rajendran, K. V., Makesh, M., & Karunasagar, I.
(2012). Monodon Baculovirus of Shrimp. Indian
Journal of Virology, 23(2), 149–160. doi:
10.1007/s13337-012-0086-z
Monodon Baculovirus (MBV)#10
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9. Shrimp Hemocyte Iridescent Virus (SHIV)
Qiu et al (2017)
Susceptible Species
Litopenaeusvannamei
Fenneropenaeuschinensis
Macrobrachiumrosenbergii
#9
Is it OIE-listed? No
Also known as
SHIV 20141215 - A strain of Decapod
Iridescent Virus 1 (DIV1)
09
10. Shrimp Hemocyte Iridescent Virus (SHIV)
Qiu et al (2017)
Clinical Symptoms
Empty Stomach & Gut
Pale Hepatopancreas
Soft Shell
A distinct white triangle area under the
carapace at the base of rostrum of M.
rosenbergii (a.k.a "white head")
#9
Mortality & Morbidity
Cumulative mortality up to 80%
10
11. Shrimp Hemocyte Iridescent Virus (SHIV)
Qiu et al (2017)
#9
Behavioural Changes
The moribund prawns (M. rosenbergii) lost
their swimming ability and sank to the
bottom of water and were rarely found in
shallow water.
Susceptible Stages
Unknown
11
12. Shrimp Hemocyte Iridescent Virus (SHIV)
Qiu et al (2017)
#9
Special Note
According to Qiu et al (2019), M. rosenbergii
exhibiting "white head" were polycultured
withP.vannamei.
Hence, it is wise to take note that
polyculture with different species of
crustaceans may bring risks for spread of
disease, increase of susceptible species,
and evolution of pathogens.
12
13. Shrimp Hemocyte Iridescent Virus (SHIV)
Qiu et al (2017)
#9
References
Qiu, L., Chen, M., Wan, X., Li, C., Zhang, Q., &
Wang, R. et al. (2017). Characterization of a new
member of Iridoviridae, Shrimp hemocyte
iridescent virus (SHIV), found in white leg
shrimp (Litopenaeus vannamei). Scientific
Reports, 7(1). doi: 10.1038/s41598-017-10738-8
Qiu, L., Chen, X., Zhao, R., Li, C., Gao, W.,
Zhang, Q., & Huang, J. (2019). Description of a
Natural Infection with Decapod Iridescent
Virus 1 in Farmed Giant Freshwater Prawn,
Macrobrachium rosenbergii. Viruses, 11(4), 354.
doi: 10.3390/v11040354
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