RESUMO
In the present study, the tape worm Hymenolepis diminuta was chosen to estimate lead bioaccumulation in an urban area highly polluted with lead (the industrial area) and another less polluted one (Al-Karj road) at Riyadh City, K.S.A. Lead concentrations were found 38 to be 32 and 15 times in the parasite (H. diminuta) than in the intestine, liver and kidney of the host (Meriones libycus). Thus, the proposed model of cestode parasite-rat as bio-indicator of lead pollution seems to be promising in the terrestrial habitat.
Assuntos
Monitoramento Ambiental/métodos , Gerbillinae/metabolismo , Gerbillinae/parasitologia , Hymenolepis diminuta/metabolismo , Chumbo/análise , Animais , Monitoramento Epidemiológico , Mucosa Intestinal/metabolismo , Rim/metabolismo , Chumbo/metabolismo , Fígado/metabolismo , Especificidade de Órgãos , Arábia Saudita/epidemiologiaRESUMO
Prevalence of tapeworm infections among sheep slaughtered in Riyadh City were studied from February 2007 to March 2008. A total of 76 out of 3300 sheep were infected with adult cestodes (2.3%). The highest infection rate was in autumn (8.1%), and the lowest one was in summer (1.7%). The cestodes were identified as Moniezia expansa (96.3%) and M. deuticulata (3.7%). Concerning seasonal dynamics of the worms, the highest number was recorded in October and November (13.5 & 8.3%), while the lowest one was in June and July (0.7 & 1.3%). The examination of muscle samples from rump, shoulders and thigh of 1001 sheep revealed Cysticercus ovis in 120 sheep (12%). The highest infection rate (17.5%) was in autumn, and the lowest one (6.2%) was in summer.