Ultrastructural Study on Biomphalaria Alexandrina Haemocytes Infected with Schistosoma Mansoni in Egypt and Its Correlation with Nitric Oxide Level

Helal, Eman G.E.; El-Dafrawy, Shadia M.; Mohamed, Asmaa; Abou-El-Nour, Basma M.; Ibrahim, Samah

doi:10.12816/0006450

Cited by 3 publications

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“…The present study showed that the hemolymph of the snails is composed of three types of hemocytes: granulocytes, amoebocytes, and hyalinocytes which agrees with the results introduced by (El Sayed et al 2011;Mossalem et al 2017). The present study showed that the hemolymph of the snails is composed of three types of hemocytes: granulocytes, amoebocytes, and hyalinocytes which agrees with the results introduced by Kamel et al (2006); El Sayed et al (2011) and Helal et al (2014). Contrary to the present study, Mohamed (2011) indicated that B. alexandrina hemocytes can be classified according to cell shape and size into two types: small, round hyalinocytes and granular spreading.…”

Section: Discussionsupporting

confidence: 91%

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Assessment of Amphora coffeaeformis and Scenedesmus dimorphus algae as immunostimulant agents on Biomphlaria alexandrina snails against Schistosoma mansoni

2022

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Schistosoma mansoni is the main factor of human schistosomiasis which is responsible for high rates of mortality. Recently, the use of alternative biological control agents has gained importance in disease control because the intensive use of molluscicides is very harmful to human health and poses risks to the environment. In the present work, the potential effect of two freshwater algae, Amphora coffeaeformis and Scenedesmus obtusus, on the immune response of Biomphalaria alexandrina snails against infection with S. mansoni was investigated. Two different concentrations 1 and 2 g L− 1 from each dried algal material were tested on snails before exposure to miracidial infection by one day. The use of Amphora coffeaeformis has a greater immunostimulatory effect than Scendesmus obtusus at a low concentration of 1.0 g L− 1. The tested algae affected the snail’s hemocytes and its immune response to S. mansoni as evidenced by a significant decrease in infection rate and cercariae production. In addition, increasing in total hemocyte count, the formation of vacuoles, the appearance of several pseudopodia, and the formation of coarse granules in hemocytes of infected snails treated with A. coffeaeformis. Intense tissue reactions were also observed. In conclusion, it was confirmed that these algae can be used as an immunostimulant in the prevention and control of S. mansoni.

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Section: Discussionsupporting

confidence: 91%

“…They were responsible primarily for wound repair, requiring aggregation at an injury site. On other hand, granulocytes are large amorphous cells with granules in the cytoplasm, which easily adhere to substrates and form pseudopods (Bezerra et al 2003;Helal et al 2014).…”

Section: Discussionmentioning

confidence: 99%