Year : 2015 | Volume
: 8 | Issue : 2 | Page : 107--114
Effect of nitroxynil (fasciolid) on adult Fasciola gigantica and Fasciola hepatica in infected cows
Eman K Omran, Noha S Ahmad
Department of Medical Parasitology, Faculty of Medicine, Sohag University, Sohag, Egypt
Drug resistance to treatment of fascioliasis with triclabendazole (TCBZ) has emerged in Sohag Governorate, Egypt. Nitroxynil belongs to the halogenated phenol group of fasciolicides. It is highly active against adult liver flukes. A nitroxynil metabolite is produced in the liver parenchyma adding to its flukicidal activity and augmenting its efficacy against late immature flukes that migrate through the liver tissues. Treatment with nitroxynil may be an effective replacement for therapy with TCBZ in cases of resistance.
The aim of this study was to evaluate the efficacy of nitroxynil in the treatment of fascioliasis by assessing its effect on teguments and durability of adult Fasciola gigantica and Fasciola hepatica worms.
Materials and methods
Infected cows were selected on the basis of clinical signs, and infection was confirmed by detection of Fasciola eggs in their stools. Nitroxynil was administered as recommended in two doses 15 days apart, and the animals were slaughtered 15 days after treatment. Fasciola worms collected from the bile ducts were identified and prepared for electron microscopy. Tegument changes were examined with scanning electron microscopy.
The removed adult flukes of both species were moving sluggishly and appeared pale with no evidence of gut content. Scanning electron microscopy examination of these flukes revealed evidence of swelling of the tegument that showed regional variation in its severity. Loss of spines was also observed.
The present study demonstrated the flukicidal properties of nitroxynil, proving that the tegument is an important target for its action. Disruption of the fluke«SQ»s main line of defense allowed the drug access to other internal tissues, leading to more widespread damage. Nitroxynil may be successfully used for treatment in case of resistance to TCBZ.
Eman K Omran
PhD, Department of Medical Parasitology, Faculty of Medicine, Sohag University, Sohag 2630
|How to cite this article:|
Omran EK, Ahmad NS. Effect of nitroxynil (fasciolid) on adult Fasciola gigantica and Fasciola hepatica in infected cows.Parasitol United J 2015;8:107-114
|How to cite this URL:|
Omran EK, Ahmad NS. Effect of nitroxynil (fasciolid) on adult Fasciola gigantica and Fasciola hepatica in infected cows. Parasitol United J [serial online] 2015 [cited 2020 Sep 29 ];8:107-114
Available from: http://www.new.puj.eg.net/article.asp?issn=1687-7942;year=2015;volume=8;issue=2;spage=107;epage=114;aulast=Omran;type=0