KR Wallbanks

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Blood samples from 3000 Somali camels (Camelus dromedarius) were examined for trypanosome infection. Of these, 160 (5.33%) were infected with Trypanosoma evansi, one (0.03%) with T. congolense and one (0.03%) with T. brucei. Camel trypanosomiasis occurred in most areas of tabanid infestation throughout the country. The tabanids Philoliche zonata and P.(More)
Lysates of heads, hind- and midguts of male and female Phlebotomus papatasi were found to contain lectins or lectin-like molecules capable of agglutinating human red blood cell types of the ABO(H) system and promastigotes of Leishmania aethiopica, L. major and L. donovani but not L. hertigi hertigi promastigotes or Crithidia fasciculata choanomastigotes.(More)
Of 13 Swedish dairy cows examined, 12 (92.3%) were found to be infected with trypanosomes by cultivation of blood samples. Of the two species of tabanid fly caught close to the cattle, 33.3% of theTabanus brornius and 8.6% of theHaematopota pluvialis were also found to be infected with trypanosomes on dissection. Isoenzyme patterns of trypanosome isolates(More)
The ultrastructure of the peritrophic membrane of the female sandfly Phlebotomus papatasi has been studied at various times after blood meals. The membrane begins to form within four hours of the blood meal with the secretion by the entire midgut epithelium of an electron-dense amorphous material. Subsequently, the membrane is stabilized and strengthened by(More)
A midgut trypanolysin and an agglutinin from Glossina palpalis subspecies were isolated and partially characterized using anion-exchange chromatography and polyacrylamide gel electrophoresis. FPLC fractions of midgut extracts of Glossina palpalis palpalis caused agglutination and lysis of two trypanosome species (Trypanosoma congolense and Trypanosoma(More)
The first description of an electron microscopic study ofTrypanosoma corvi in the vectorOrnithomyia avicularia is reported. There is a close association between vector and parasite in the midgut, ileum and rectum of the vector. The midgut distribution of parasites is determined by the peritrophic membrane, which confines the early infection to the(More)
Procyclic trypomastigotes of Trypanosoma brucei brucei, cultured in Cunningham's medium with 20% heat-inactivated foetal calf serum at 27 degrees C, attached to chitosan and to gels of N-acetyl chitosan and glycol chitosan. Following attachment, epimastigotes, metacyclic-like trypomastigotes and multinucleate parasites appeared in the culture supernatant.
Phlebotomus ariasi Tonnoir sandflies were caught in light traps hung in oak trees and in a house in the Cévennes focus of leishmaniasis in the South of France. The flies were cryopreserved either immediately on removal from the traps, or after starvation for 6-7 days, or after 6-7 days starvation followed by exposure to oak infested with the aphid genera(More)
The relationship between Leishmania parasites and their sandfly vectors has been the subject of several studies over the past decade (see Killick-Kendrick 1979, 1986; Molyneux and Killick-Kendrick 1987; Molyneux et al. 1986). Transmission and scanning electron microscopy of infected flies (Killick-Kendrick et al. 1974; Molyneux etal. 1975; Warburg et al.(More)
Trypanosomes were isolated by culture from 2 out of 50 blood samples collected from reindeer (Rangifer tarandus L.) in northern Sweden and from a blood sample from a moose (Alces alces) from Southern Sweden. The parasites were indistinguishable morphologically from other trypanosomes reported from cervids, both as epimastigotes in axenic culture at 27(More)