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A group of 10-day-old chickens was experimentally infected with a dose of 500 infective eggs of Ascaridia galli (Schrank, 1788) (Nematoda). Forty-nine days post infection the chickens were necropsied and the infection intensily and prevalence were determined. The group maintained on the feed containing 11% of protein showed higher infection intensity and prevalence compared to the chickens fed a diet containing 19% of protein. The addition of vitamin B₂ to the feed containing 11% protein resulted in lower intensity and prevalence of the infection. In both series of experiments no effect of Zn-bacitracin or vitamin B₂ on infection intensity or prevalence was observed for chickens fed feed containing 19% of protein.
The investigations covered 54 subsequent generations of Hymenotepis diminuta WMS „strain" obtained through the administration of 6 cysticercoids of tapeworm to Wistar strain rats and WAG alb. rats. The number of tapeworms at 2.5 months after the infection of rats ranged from 3 to 6, on the average 5.2. Taking into consideration the most important type 1p2a (one testis on the poral side and two testes on the aporal side), 0p3a, 1p3a and 2p1a proglottids a significant differences was found in the distribution of the numerousity of type 1p3a proglottids (P<0.05). This indicates a possibility of an unguided change of the numerousity of proglottids of this type in a period covering 54 subsequent H. diminuta generations bred in laboratory conditions.
A total of 150 gilthead seabream Sparus aurata L., from North Lake of Tunis, Tunisia, were studied for protozoan and myxozoan parasites. The parasitological survey revealed the presence of ectoparasites (Amyloodinium ocellatum Brown, 1931, Trichodina lepsii Lom, 1962 on the gills) and endoparasites (Ceratomyxa sparusaurati Sitjà-Bobadilla, Palenzuela et Alvarez-Pellitero, 1995 infecting the gallbladder, and Eimeria sparis Sitjà-Bobadilla, Palenzuela et Alvarez-Pellitero, 1996 parasitizing the intestine). This is the first record of Amyloodinium ocellatum, Trichodina lepsii, Ceratomyxa sparusaurati, and Eimeria sparis in S. aurata from Tunisian waters. Data on prevalence and intensity of infection are provided. A comparison of the present species with previously described species in cultured gilthead seabream from other Mediterranean countries is also presented. In this study Trichodina lepsii is identified for the first time in Sparus aurata. A taxonomic description of this species based on silver nitrate method is provided.
CFW strain white mice were infected with various doses (10, 30, 50 and 100) of Fasciola hepatica metacercariae administered per os. Using histochemical methods, the activity of selected oxidoreductases (α-glycerophosphate dehydrogenase, isocitrate dehydrogenase, succinate dehydrogenase, and cytochrome oxidase) was evaluated in the liver of the mice suffering from acute and chronic fasciolosis. Intensified anaerobic and aerobic respiration was recorded. The host’s compensatory mechanism observed in the form of intensified metabolism, was found to be related to the infection intensity.
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