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M.Sc. (Zoology) / This investigation is the first systematic survey of the cestodes of some Muridae and some Cricetidae in the Republic of South Africa. Previous records of these parasites in the Ethiopian Region form part of reports on the helminthfaunae of various countries. The cestodes which have been recorded from Myomorpha in the Ethiopian Region are summarized in Table 1. Some of the cestodes recovered in this survey have a cosmopolitan distribution and have been recorded from many species of rodents in various parts of the world. It is not possible or relevant to include all these records in the list of definitive hosts which therefore only include those hosts recorded in this survey. The foilowing authors were consulted to verify the correct names of the host animals: Allen (1939), Cabrera (1960), Davis (1968), De Graaff (1968), Ellerman & Morrison-Scott (1951), Missone (1968) and Troughton (1941). In the text the current names of African states are used instead of those mentioned in the literature. They are: Congo (Democratic Republic)- Belgian Congo Rhodesia- Southern Rhodesia Somalia- Italian Somaliland Tanzania- Tanganyika Zambia- Northern Rhodesia In listing the localities in the Republic of South Africa the various provinces are abbreviated as follows: E.P. - Eastern Province (Cape Province) W.P.- Western Province (Cape Province) N.W.P. -North Western Cape (Cape Province) Ntl.- Natal O.F.S.- Orange Free State Tvl.- Transvaal…

Samples of Gasterosteus aculeatus from 16 areas in the Fraser Valley and environs were examined for plerocercoids of Schistocephalus solidus. Fish at Coal Harbour and Alouette Lake were sampled several times over a twelve month period. The number and sizes of worms present in the Alouette Lake fish samples were recorded, and it was found that infected fish less than 45 mm. total length carried on average more worms than those over 45 mm., and that uninfected adult fish were caught only during the breeding season. In another lake, infected fish were found in a different area from the uninfected ones. The fish intermediate host was shown to be affected by the infection in four ways: (i) Infected fish died sooner than uninfected fish, (ii) Heavily infected fish were lighter in weight of fish tissue than controls of the same length, (iii) The total standard respiration rate of infected fish was higher than that calculated by combining values obtained from uninfected fish and published values for in vitro plerocercoids. (iv) Heavily infected fish required up to twice as much oxygen per gram fish weight per hour when swimming at the same speed as control fish. Other aspects were examined but the results were inconclusive or negative. The observations on natural populations are discussed in the light of the experimental findings. / Science, Faculty of / Zoology, Department of / Graduate

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Call number: LD2668 .T4 1939 C31 / Master of Science

Thesis--University of Wisconsin. / Includes bibliographical references (leaves 113-120).

A study was conducted to determine the efficacy of bunamidine hydrochloride against the immature and mature stages of Echinococcus granulosus found in Utah. Twenty-seven dogs were obtained from local animal shelters and experimentally infected with the parasite. The drug was given at dosage levels of 25 mg/kg to 50 mg/kg of bodyweight. It was from 85.9 to 98.8% effective against the immature stage, and 100% effective against the adult stage. The results suggest that this drug can feasibly be used under field conditions where hydatid disease is endemic.

Master of Science