| Titles |
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English :
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Biological eradication of some parasitic diseases of fish by using Bacillus thuringiensis agerin product
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Arabic :
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المكافحة البيولوجية للقضاء على بعض مسببات أمراض الأسماك الطفيلية بأستخدام مستحضر الاجيرين (بسلس سيرنجيسيس).
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| Abstract |
In the present study, the clinical signs of naturally infested Ctenopharyngodon idella with Ichthyoboda necator and Capillaria spp. larval stage and naturally infested Oreochromis niloticus with ectoparasites of the ciliated Trichodina and monogenetic trematode Gyrodactylus spp. were observed and recorded. The prevalence of infection in C. idella with I. necator was 100% and Capillaria larvae was 50%. Moreover, the prevalence of infection in O. niloticus with mixed infestation of Trichodina and Gyrodactylus spp. were 100%. Microbial antiparasitic product (Agerin) was tested by bath administration for in vivo activity against a natural infestation of C. idella and O. niloticus by the flagellated I. necator and larval stage of capillaria spp. and mixed infestation of Trichodina spp. and Gyrodactylus spp, respectively by bathing fishes in different concentrations and variable exposure times.
Fish were also monitored for signs of drug toxicity and determination of half lethal concentration. The value of LC50 in C. idella and O. niloticus were 6800 ppm/48 h and 6200 ppm/48 hrs, respectively. Dissolved oxygen concentration in the exposure solution during LC50 test were measured and severe oxygen depletion were noticed with product concentration > 5000 ppm/48 hrs with respiratory distress and fish mortality.
Complete elimination of I. necator and capillaria larvae in all C. idella fish was achieved by 1000 ppm/1 h. and 500 ppm/2 h of Agerin. Trichodina spp. were also completely eradicated at 500 ppm/1 hr, 1000 ppm/2h and indefinite use of 100 ppm with naturally infested O. niloticus.
The biological product Agerin was not toxic to treat ectoparasite protozoan in C idella and O. niloticus. On the other hand, this product was not suitable for treatments of gyrodactylus spp
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| Publication year |
2003
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| Organization Name |
Animal Health Research Institute (AHRI)
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| Country |
Egypt
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| City |
القاهرة
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| serial title |
مجلة كلية الطب البيطرى(مصر)
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| Volume |
51
. 1
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| Department |
fish disease dep.
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| Author(s) from ARC |
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| Agris Categories |
Animal diseases
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AGROVOC
TERMS |
Bacillus thuringiensis.
Infection.
Oreochromis niloticus.
Parasitoses.
Symptoms.
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| Proposed Agrovoc |
biological eradication;
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| Publication Type |
Journal
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