Résumé
The effect of sodium benzoate [SB] on the pathogenesis of Hymenolepis nana [H. nana] and its neurological manifestations was studied in the present work. One hundred and thirty five mice were classified into three groups. GI: received SB alone, GII: received SB before and after infection with H. nana and GIII: infected with H. nana. All groups were subjected to parasitological, histopathological, immunohistochemical and biochemical assays. The results revealed a significant decrease in TL-4 serum level with a significant increase in gamma amino butyric acid [GABA] and decrease in zinc brain levels in GI, while GII showed non significant increase in IL-4 level that resulted in a highly significant increase in the mean number of cysticercoids and adult worms with delayed expulsion as compared to GIII. This was reflected on histopathological and immunohistochemical changes in the brain. Also, there was a highly significant increase in GABA and decrease in zinc brain levels in GII to the degree that induced behavioral changes. This emphasizes the possible synergistic effect of SB on the neurological manifestations of H. nana and could, in part, explain the increased incidence of behavioral changes in children exposed to high doses of SB and unfortunately have H. nana infection
Sujets)
Animaux de laboratoire , Hyménolépiase/physiopathologie , Additifs alimentaires/effets indésirables , Benzoate de sodium/effets indésirables , Interleukine-4/sang , Acide gamma-amino-butyrique/sang , Zinc , Immunohistochimie/méthodes , SourisRésumé
An epidemiological study on H. nana infection was carried out in Ciego de Avila province, Cuba, fron 1981 to 1995. In this 15 years period 3,108,422 stool samples were examined for parasites, H. nana eggs were found in 250 (0,008 percent). Seasonal influence of this parasitism was not detected. There were more cases in children than in adults, with males prevaling over females. The more frequent symptoms and signs were abdominal pain, diarrhea and anorexia which relationships with food habits, dwelling characteristics, children day care center and school orchards are analyzed