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PubMed1991

Repeat regions of malaria parasite proteins: a review of structure and possible role in the biology of the parasite.

Tandemly repeated amino acid sequences are characteristic of many malaria parasite proteins that have been sequenced to date. Strong selective pressures must exist to maintain the repeat regions and also to diversify them in the case proteins containing strain-variant repeats. Repeats have been suggested to function in immune-evasion and in binding to host receptors. This article focuses on the structural characteristics of the repeats in relation to their postulated function.

Amino Acid Sequence↗
PubMed1991

Parasites of South African wildlife. VIII. Helminth and arthropod parasites of warthogs, Phacochoerus aethiopicus, in the eastern Transvaal.

Helminth and arthropod parasites were collected from 41 warthogs, Phacochoerus aethiopicus, in the Hoedspruit Nature Reserve, eastern Transvaal. This reserve consists of a military base, which is a restricted area and is surrounded by a reserve, which is open to the public. Eleven nematode species, 1 or 2 cestode species and the larvae of 2 cestode species were recovered from the animals in the reserve, and 8 nematode species and 1 or 2 cestode species were recovered from those in the military base. Oesophagostomum spp. were generally most abundant in warthogs in the reserve during the cooler months of the year, while Probstmayria vivipara also occurred in peak numbers during the cooler months, with an additional peak in October and November 1988 in warthogs in the reserve and the base, respectively. No pattern of seasonal abundance could be determined for the other helminth species. The warthogs also harboured 8 ixodid and 1 argasid tick species, 3 flea species and 1 louse species. Adult and immature Haematopinus phacochoeri were most numerous during August and September, and the largest numbers of adult Rhipicephalus simus were present from December to April.

Animals↗
PubMed1986

Parasites of domestic and wild animals in South Africa. XX. Arthropod parasites of the Cape mountain zebra (Equus zebra zebra).

The arthropod parasite burdens of 14 Cape mountain zebra (Equus zebra zebra), shot for survey purposes in the Mountain Zebra National Park in the eastern Cape Province, were determined. Three species of Gasterophilus larvae and 9 ixodid tick species were recovered. Larvae of Gasterophilus pecorum were the most numerous of the fly larvae recovered and Margaropus winthemi was the most abundant tick. Two horses examined in the park were infested with 3 species of Gasterophilus larvae and 7 species of ixodid ticks.

Animals↗
PubMed1984

Parasites of domestic and wild animals in South Africa. XVII. Arthropod parasites of Burchell's zebra, Equus burchelli, in the eastern Transvaal Lowveld.

Thirty-five Burchell's zebra, Equus burchelli, were shot for arthropod parasite recovery during the period November 1978-January 1982 in the Kruger National Park. Six species of gasterophilid larvae, 2 species of oestrid larvae, 2 louse species and 7 ixodid tick species were recovered. The distribution of the Gasterophilus spp. larvae within the gastrointestinal tract and their seasonal prevalence were determined. The seasonal prevalence of the oestrid larvae and 4 of the 7 ixodid tick species was also ascertained.

Animals↗
PubMedDate not supplied

[Parasites of chelonians in intertropical Africa: Polystomoides nabedei n. sp. (Monogenea, Polystomatidae), a parasite of the bladder of the freshwater tortoise Pelomedusa subrufa Lacépède, 1788 (Chelonian, Pelomedusidae) (author's transl)].

Description of Polystomoides nabedei n. sp., a parasite of the bladder of the freshwater tortoise Pelomedusa subrufa Lacépède, 1788 in Togo. P. nabedei is similar to Polystomoides chabaudi Euzet et Combes, 1965 described in Madagascar and reported from Uganda by Tinsley (1973) in the same host, but differs in that the hooks of the external pair are longer, the hooks of the internal pair show an insertion of the hilt very close to the point (while it is found to half the length in P. chabaudi), the vitellogenes are more developed in the post-testicular area.

Animals↗
PubMed1994

Parasites of South African freshwater fish. VI. Nematode parasites of some fish species in the Kruger National Park.

The nematode parasites of 30 spot-tailed robbers, Brycinus imberi, five tiger-fish, Hydrocynus vittatus, 77 large-scaled yellowfish. Barbus marequensis, two mudsuckers, Labeo molybdinus, 114 catfish, Clarias gariepinus, 46 silver barbel, Schilbe intermedius, 66 squeakers, Synodontis zambezensis, three eels, Anguilla spp., 83 Mozambique bream, Oreochromis mossambicus, 81 red-breasted bream, Tilapia rendalli swierstrae and 32 large-mouthed bream, Serranochromis meridianus, caught in the Sabie, Crocodile and Olifants Rivers in the southern and central regions of the Kruger National Park, were collected, identified and counted. A single Camallanus sp. male was recovered from one of the mudsuckers; Capillaria spp. from three catfish and one squeaker; philometrid nematodes from two silver barbel, 15 squeakers and a large-mouthed bream; Paracamallanus cyathopharynx from one tiger-fish, 80 catfish, 28 silver barbel and one squeaker; Procamallanus laeviconchus from a single catfish; Rhabdochona esseniae from six large-scaled yellowfish; Rhabdochona versterae from 14 spot-tailed robbers; Rhabdochona spp. from 20 catfish, 17 silver barbel, eight squeakers, two eels, one large-mouthed bream and two red-breasted bream; Raillietnema synodontisi from 33 squeakers; Spinitectus petterae from 37 catfish; Spinitectus zambezensis from 55 squeakers; Spinitectus spp. from one tiger-fish and four silver barbel, and Spirocamallanus daleneae and Synodontisia thelastomoides from 33 and 35 squeakers, respectively.(ABSTRACT TRUNCATED AT 250 WORDS)

Animals↗
PubMed1995

Parasites of domestic and wild animals in South Africa. XXXIV. Arthropod parasites of nyalas in north-eastern KwaZulu-Natal.

Seventy-three nyalas (Tragelaphus angasii) in the Umfolozi, Mkuzi and Ndumu Game Reserves in northeastern KwaZulu-Natal were examined for arthropod parasites during 1983 and 1984. In addition, six animals were examined during 1994. Ten ixodid tick species, two louse species and a louse fly species were recovered. The nyalas were good hosts of all stages of development of Boophilus decoloratus, Rhipicephalus appendiculatus and Rhipicephalus muehlensi and the immature stages of Amblyomma hebraeum and Rhipicephalus maculatus. Adult male animals harboured more adult ticks, biting lice and louse flies than did adult females. B. decoloratus was generally most abundant from October to May. The larvae of R. appendiculatus peaked from April to October, nymphs from July to October and adults, on adult male nyalas, from February to May. Larvae of R. maculatus were most abundant from May to July and nymphs from June to October. The immature stages of A. hebraeum and all stages of R. muehlensi were present throughout the year.

Animals↗