STUDIES ON THE MOLLUSCICIDAL ACTIVITY OF AGAVE ANGUSTIFOLIA AND PITTOSPORUM TOBIRA ON SCHISTOSOMIASIS TRANSMITTING SNAILS
IBRAHIM, A., ABDEL-GAWAD, M., EL-NAHAS, H., OSMAN, N. (2015). STUDIES ON THE MOLLUSCICIDAL ACTIVITY OF AGAVE ANGUSTIFOLIA AND PITTOSPORUM TOBIRA ON SCHISTOSOMIASIS TRANSMITTING SNAILS. EKB Journal Management System, 45(1), 133-141. doi: 10.21608/jesp.2015.89723
ABDALLA M. IBRAHIM; MAHFOUZ M. ABDEL-GAWAD; HANAN A. EL-NAHAS; NADIA S. OSMAN. "STUDIES ON THE MOLLUSCICIDAL ACTIVITY OF AGAVE ANGUSTIFOLIA AND PITTOSPORUM TOBIRA ON SCHISTOSOMIASIS TRANSMITTING SNAILS". EKB Journal Management System, 45, 1, 2015, 133-141. doi: 10.21608/jesp.2015.89723
IBRAHIM, A., ABDEL-GAWAD, M., EL-NAHAS, H., OSMAN, N. (2015). 'STUDIES ON THE MOLLUSCICIDAL ACTIVITY OF AGAVE ANGUSTIFOLIA AND PITTOSPORUM TOBIRA ON SCHISTOSOMIASIS TRANSMITTING SNAILS', EKB Journal Management System, 45(1), pp. 133-141. doi: 10.21608/jesp.2015.89723
IBRAHIM, A., ABDEL-GAWAD, M., EL-NAHAS, H., OSMAN, N. STUDIES ON THE MOLLUSCICIDAL ACTIVITY OF AGAVE ANGUSTIFOLIA AND PITTOSPORUM TOBIRA ON SCHISTOSOMIASIS TRANSMITTING SNAILS. EKB Journal Management System, 2015; 45(1): 133-141. doi: 10.21608/jesp.2015.89723

STUDIES ON THE MOLLUSCICIDAL ACTIVITY OF AGAVE ANGUSTIFOLIA AND PITTOSPORUM TOBIRA ON SCHISTOSOMIASIS TRANSMITTING SNAILS

Journal of the Egyptian Society of Parasitology
Article 17, Volume 45, Issue 1, April 2015, Page 133-141  XML PDF (320.7 K)
Document Type: Original Article
DOI: 10.21608/jesp.2015.89723
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Authors
ABDALLA M. IBRAHIM1; MAHFOUZ M. ABDEL-GAWAD2; HANAN A. EL-NAHAS2; NADIA S. OSMAN2
1Department of Zoology, Faculty of Science, Ain Shams University, Cairo 11566, Egypt.
2Department of Medicinal Chemistry, Theodor Bilharz Research Institute, Imbaba P.O. Box 30, Giza, Egypt.
Abstract
In the search for new molluscicidal plants for controlling the snail vectors of schistosomiasis, laboratory evaluation was made to assess the molluscicidal activity of Agave angustifolia and Pittosporum tobira plants against Biomphalaria alexandrina snails. Results indicated that both plants have promising molluscicidal activity as the LC90 of the dry powder of both plants was 120 ppm. Both plants showed marked cercaricidal and miracidicidal potencies against S. mansoni larvae. The LC90 of both plants (120 ppm) killed most B. alexandrina eggs within 24 h of exposure. The sub-lethal concentrations of both plants markedly suppressed the survival rate of B. alexandrina snails and the mortality increased with increasing the concentrations and the exposure period up to 10 successive weeks. The accumulative toxic effect of these concentrations was continuous during the recovery period. Also, the reproductive rates of exposed snails were greatly affected even through the recovery period. This depression in reproductive ability of snails was accompanied by histological damage in the hermaphrodite glands of exposed snails. Meanwhile, the growth of snails was estimated weekly and it showed great inhibition in exposed snails comparing with the control ones.
Keywords
Molluscicidal plants; Agave angustifolia; Pittosporum tobira; Schistosomiasis
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