Angewandte Parasitologie最新文献

A comparison of the symptomatology, haematology and prevalence of trypanosomiasis in Holstein Friesian and White Zebu cattle exposed to natural infections on a ranch in a rain forest zone of Nigeria is presented. 23 (44%) of the adult Friesians had trypanosome infections with a generally heavy parasitaemia. Infection was light in the Friesian calves and the Zebus with infection rates of 2 (6.9%) and 3 (15%) respectively. Trypanosoma vivax was the sole species encountered on the farm. There was a general unthrifty appearance in the adult Friesian herd as well as classical signs of trypanosomiasis. The Friesian calves and Zebus were generally in good conditions with an appearance of good health except one each of the infected animals which showed apparent symptoms of the disease. There was a marked reduction of the red cell values of the infected adult Friesian and Zebu cattle. The red cell values of the uninfected adult Friesians were equally depressed suggesting cryptic infections or that they were cured parasitologically by the recently administered trypanocide. The Friesian calves had normal red cell values for both the infected and uninfected. Leucocyte counts were generally high on the Farm and higher for the infected animals.

In the present study we describe the histopathological alterations induced by RC strain of Trypanosoma cruzi in the mouse von Ebner's lingual salivary glands during the acute period of infection: Amastigotes were found in von Ebner's gland acini cells, excretory duct cells, intralobular connective tissue, inside the acini lumen and muscle fibres. Desorganized parenchyma with impairment at the acinar and duct level, and intense lymphoplasmocytic infiltrate were seen.

The morphologic criteria length and breadth were used for the examination of the purity from 23 strains of different Eimeria species in the fowl (Eimeria tenella, E. acervulina, E. maxima, E. necatrix) by three methods: Tabulate graphic method, determination of the size of concentration, analysis with counter. The tabulate graphic method by use of peak value as only criterion of valuation has suitable proved for the screening test. A qualification of the degree of purity is reached in the form of classes of homogeneity with the criteria peak value, first and second classes of the neighbour by the determination of the size of concentration. The quantitative certainly of the assertion increases by the analysis with counter from six statistical parameters (frequency of peak value, frequency of the sum from peak value, first and second classes of the neighbour, number of taking classes in the specific range of species, coefficient of variation, coefficient of correlation, divergence of specific index of the form in the species).

A procedure is described for the elucidation of the glycolytic flux rate of red blood cells infected with the malarial parasite Plasmodium berghei. It is based on the titration of the protons originating from the glycolytic lactate accumulation. Compared with traditional methods of biochemical measurements of glucose consumption or accumulation of lactate the proposed procedure shows the following advantages: continuously measurement is possible; constancy of the pH-value during the measurement; lower amounts of biological material are necessary (increased sensitivity) increased accuracy; The method can also be applied to studies on other cells and species with normal or increased glycolytic flux rate.

S. truttae is described from brown trout and grayling in Middle Germany. This species is obviously not connected with PKX, the causative agent of Proliferative Kidney Disease (PKD) in salmonids. S. truttae, however, is important in this connection from the viewpoint of differential diagnostics.

Clinical-parasitological experiences collected 1989 in Cameroon during a 6-weeks lasting medical work are reported. Malaria tropica is by far the greatest problem due to the impossibility of an effective epidemiologic control, further to rising drug resistances. Beside malaria there are plenty of other parasitoses, but they are more restricted to lower social groups and to certain geographic regions--to the extreme Northern part of Cameroon in particular. Furthermore the actual situation depends also from epidemiologic control programmes. So the trypanosomiasis seems to be under epidemiologic control, the onchocerciasis in opposite to it has been increased again due to the absence of an effective control programme at present.

In the course of the sporogony of Eimeria tenella 7 stages were differentiated: stage of rounded sporont, stage of knob formation, first four-globe stage, pyramid-stage, second four-globe stage, stage of sporozoit differentiation, stage of complete sporulation.

Results of anal swabs have been compared with room dust samples. The room dust was collected using little brushes as well as a vacuum cleaner from a standard surface of 0.25 m2. To collect room dust by vacuum cleaner, a slide was placed into a special chamber, connected to an absorbing device. Eggs of E. vermicularis have been found in samples made with anal swabs, room dust brushes and the vacuum cleaner, respectively, as follows: in the first examination 34%, 17.4% and 25.1%, in the second examination 35%, 17.7% and 15.7% and in the third examination 42%, 15.7% and 35.4%.. The results are discussed with regard to methodical and epidemiological aspects of the examination eggs of E. vermicularis in room dust.

The new nematode species was located in the rectum. It is described and especially compared with Capillaria gracilis (BELLINGHAM, 1844). Its position in the subgenera of the genus Capillaria ZEDER, 1800, proposed by MORAVEC (1987), is discussed.

The seasonal dynamics of C. barbi of two consecutive generations of one-summer old silver carps (Hypophthalmichthys molitrix) from a winter basin was investigated. One maximum of intensity in spring (80 to 100%) and one minimum in summer to early autumn (20% to 0) shows a course of incidence with a pattern of a one-year-cycle of the patent (celozoic) infection in both silver carp populations. C. barbi was also observed in grass carp (Ctenopharyngodon idella) and bighead carp (Aristichthys nobilis). A pathogenic influence of C. barbi to the three Far Eastern cyprinid fish species was not observed.