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In subsequent co-infections of Sobolevicanthus gracilis and Fimbriaria czaplinskii an elimination of the majority of specimens of the first species by the next one has been found at the early stage of development. This did not depend on the fact, which species was the first. In concurrent control co-infections of larvae of both species mentioned above developed simultaneously and correctly. It seems to testify the existence of interspecific competition expressed by a peculiar sensibility of larvae at their early stages of development (3rd to 5th day post infection). The longer the larvae of the first species develop the fewer of them become eliminated by the next one.
A new cestode species from the genus Fimbriaria Froelich, 1802 is described. The parasites were found in the duodenum of Aythya fuligula L. and A. nyroca Güld. Described here new species differs from those previously recorded mainly by the mode of egg evacuation from gravid strobila: the Fimbriaria sarcinalis eggs leave the uterus in large irregular packets. Negative results of experimental infection of Acanthocyclops viridis and Macrocyclops albidus (Copepoda) considered as potential intermediate hosts of this new species of cestode are also described and discussed.
The most important feature distinguishing this new species from the hitherto-described members of Fimbriaria is the number of genital primordia, which varies from about 30 in young segments to about 15 in older ones (probably as a result of their secondary division). Another essential character is the presence of 9 hook-like spines at the basis of the cirrus. The pseudoscolex and cirrus seem to attain greater sizes in this species than in the other members of the genus Fimbriaria.
The description of Fimbriaria teresae sp. n. is given. It differs from the 5 hitherto-described species of the genus Fimbriaria in having 7-10 genital primordia in every segment (one complex of proglottids), as well as deeply-situated genital atria giving the impression of the presence of proglottids. The cirrus pouch, the cirrus and the copulatory part of the vagina of F. teresae sp. n., are also bigger than the same organs in all the previously-described Fimbriaria species. The number of hook-like spines surrounding the base of the cirrus is 8.
Crowded infrapopulations of H. diminuta obtained from the WMS i11 inbred line resembled those of the potentially non-inbred WMS strain in not showing either the abrupt reductions in the numbers of worms or the destrobilation described by other autors. Denser populations of both types of tapeworm have a greather abundance of 4 - testis proglottids of the lp3a type (having 1 testis on the poral side and three on the aporal), and fewer of type 0p3a. Changes in the positioning of genital ducts and pores show a marked positive correlation with the abundance of type 2pla proglottids. Strobilae of H. diminuta WMS i11 contain a relatively greather number of type 0p3a proglottids and fewer of type 1p3a, than those of the WMS „strain"; something which is probably linked with the respective selection of the maternal Tapeworms.
The gravid proglottids of Taenia saginata from human infection before and after treatment of patient with niclosamide (Yomesan) were used for studies on oncosphere envelope ultrastructure. The envelopes examined were intact after drug treatment. The samples from niclosamide-treated and untreated patients were similar with respect to number and kinds of the protective structures surrounding the oncospheres inside gravid proglottids. Their morphology was generally similar to this described earlier for other taeniid species. Details of the ultrastructure of oncospheral envelopes from niclosamide-treated patients are presented in the paper. Contamination of the environment with eggs from treated patients, particularly in poor sanitary conditions, is discussed.
In the present study we compared the prevalence of Demodex mites in patients with rheumatoid arthritis and in one control group involving individuals of similar mean age. From each person we epilated 3–4 lashes from each eyelid and examined them under a microscope to find Demodex mites. In total 147 patients were examined. The prevalence of Demodex mites was 33% in rheumatoid arthritis (RA) patients and 31% in the control group. Our results demonstrated that the prevalence of Demodex mites was similar in RA patients as compared to the control group.
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