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International Journal of Aquaculture, 2013, Vol.3, No.20, 115
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on these fish species are affected, and if the past of
those fish disease, and clinical signs of the disease.
However, the bacteria must be isolated and identified
the decomposing to provide a definitive diagnosis.
Clinical Finding study found that the incidence of
A. hydrophila
infection due to Aeromonas Septicemia
(
MAS.). A lot of fish show clinical abnormalities of
Aeromonas were isolated and identified. Some of the
collected fish showed one or more from the following
signs according to the stage of disease; darkness in the
color of the skin, detachment of the scales, large
irregular hemorrhages on the body surface, ulcers on
the skin varied from shallow to deep necrotizing
ulcers, fin erosions, inflamed vent, exophthalmia,
abdominal distension with sero-hemorrhagic fluids
exuded from the vent as shown in Figure 1.
Figure 1 Fish infected with
Aeromonas hydrophila
.
Registered
under charity number SC000278 Heriot-Watt University is a
Scottish charity UK
3
Discussion
The percent of infection in the wild stock during
summer. These results are in agreement with those of
Eissa et al. (1994) and Company et al. (1999) who
reported that, the majority of the infection occurred
during the change of water temperature, spawning
season. Osborne et al. (1989) found high densities of
motile aeromonads within the environment during the
mid summer when sedimentary chlorophyll and water
temperature were highest. Meyer (1970) stated that
most epizootics among warm water fishes in
southeastern United States are generally reported in
late spring and early summer as the water temperature
ranged from 25
℃
-35
℃
.
4
Recommended Treatment
Oxytetracycline (Terramycin) has been the drug of
choice for treating motile aeromonads epticemias in
fishes. The drug is approved for use with pond fishes.
It is administered in feed at a daily rate of 50 mg/kg to
75
mg/kg of fish for 10 days. Fish must be withdrawn
from treatment for 21 days before they are stocked or
eaten. This treatment sometimes produces dramatic
results when it is administered for even 2 or 3 days,
and is particularly effective when fish become
infected after they have been handled, crowded, or
heldunder stress for short periods of time (Meyer,
1964;
Meyer and Collar, 1964).
Acknowledgements
I am grateful to Dr. Brian Austin B.Sc., Ph.D., D.Sc., F.H.E.A.,
F.R.S.A.Heriot-Watt University is a Scottish charity Uk ,for identification of
species of bacteria and registered under charity number SC000278 Heriot-Watt
University and also to MisAmalAlsheraa to help for collected fish.
Reference
Austin B., and D. A. Austin, 1999, Third ed. Chapter 2: Characteristics of
the diseases, In Bacterial Pathogens: Diseases of Farmed and Wild Fish,
Springer-Praxis, Praxis Publishing, Ltd. Chichester, UK., pp.13-15
Company R., A. Sitja-Bobadilla, M. J. Pujalte, E. Garay, P. Alverez-Pellitero,
and J. Perez-Sanchez, 1999, Bacterial and parasitic pathogens in
cultured common dentex, Dentexdentex L. J. fish diseases, 22: 299-309,
Eissa I. A. M., A. F. Badran, M. Moustafa, and H. Fetaih, 1994,
Contribution to Motile Aeromonas Septicemia in some cultured and
wild freshwater fish, Vet. Med. J., (Giza), 42(1): 63-69
Hazen T. C., 1979, Ecology of Aeromonashydrophila in a South Carolina
cooling reservoir.Microbial Ecology, 5: 179-195,
.
1007/
BF02013525
Hazen T. C., Fliermans C. B., Hirsch R. P., and Esch G. W., 1978,
Prevalence and distributionof Aeromonashydrophila in the USA,
Journal of Applied and Environmental Microbiology, 36(5): 731-738
Meyer F. P., 1964, Field treatments of Aeromonas liquefaciens infections in
golden shiners, Progressive Fish-Culturist, 26: 33-35,
10.1577/1548-8659(1964)26[33:
FTOALI]2.0.CO;2
Meyer F. P., and Collar J. D., 1964, Description and treatment of a
Pseudomonas infection inwhite catfish, Applied Microbiology, 12:
201-203,
PMid:14170955
Meyer F. P., 1970, Seasonal fluctuations in the incidence of disease on fish
farms, in S.F Snieziko, ed. A symposium on disease of fishes and
shellfishes, American Fisheries Society, Special Publication 5.
Bethesda, pp.21-29
Osborne J. A., G. E. Fensch, and J. A. Charba, 1989, The abundance of
Aeromonashydrophila L. at lake Harney on the St.jons river with
respect to red sore disease in stripped mullet (Mugilcephalus L.),
Florida Scientist, 52: 171-176
Real L. A., 1996, Sustainability and ecology of infectious diseases,
Bioscience, 46: 88-97,
