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At least 649 records · Page 36Linked to original sources
PubMed1995

Cyathocephalus truncatus (Cestoda: Spathebothridea) in its intermediate host Echinogammarus stammeri (Amphipoda) from the River Brenta, northern Italy.

A study was carried out on the occurrence of the tapeworm Cyathocephalus truncatus (Pallas, 1781) (Cestoda: Spathebothridea) in its intermediate host, the amphipod Echinogammarus stammeri, in the River Brenta. A total of 18,860 E. stammeri was examined from July 1990 to June 1994; only 25 of them (prevalence 0.13%) were infected with tapeworm larvae (intensity of infection 1 larva/host). Co-occurrence of C. truncatus larvae with the larva of the acanthocephalan Pomphorhynchus laevis (Müller, 1776) was recorded in 15 amphipods. Tapeworms were localized in the anterior portion of each amphipod's hemocoel, in intimate contact with E. stammeri internal organs such as the alimentary canal, and frequently induced its displacement. No differences in integumental pigmentation were noticed between infected and non-infected amphipods, and some infected E. stammeri females were ovigerous.

Acanthocephala↗
PubMed1976

Uredofos: anthelmintic activity against nematodes and cestodes in dogs with naturally occurring infections.

A new broad-spectrum anthelmintic, uredofos, was tested in 146 dogs by single and multiple oral dosing. Single doses of 100 and 50 (but not 25) mg/kg were totally effective in removing Dipylidium caninum and Taenia spp from 46 dogs with infections of tapeworms. Among groups of 15 to 20 dogs, the average percentage efficacies against Toxocara canis for single soese of 100, 50, and 25 mg/kg were 98, 96, and 81%, respectively. The average percentage of efficacies against hookworm (Ancylostoma caninum) were greater than 96% in dogs treated with single doses of 100, 50, or 25 mg/kg and were 100% in the 35 dogs given 2 or 3 treatments (24-hour intervals) at dose levels of either 25 or 50 mg/kg. The whipworm, Trichuris vulpis, was not efficaciously eliminated by single doses of 25, 50, and 100 mg/kg (av percentage of efficacies of 30, 35, and 71%, respectively). Efficacy against T vulpis markedly improved when 2 doses were given at a 24-hour interval (av percentage of efficacies were 89% at dose level of 25 mg/kg and 99% at dose level of 50 mg/kg). At either dose (25 or 50 mg/kg), 3 daily treatments were no more efficacious against whipworms than were 2 doses. There was no evidence of drug toxicosis in any dogs tested. It was concluded that uredofos is highly effective against canine tapeworms, ascarids, and hookworms when given as a single dose of 50 mg/kg and against whipworm when given at dose level of 50 mg/kg/day for 2 days.

Ancylostomiasis↗
PubMed1999

Important parasites in poultry production systems.

Poultry now accounts for 30% of all meat consumed. Parasites are a problem where ever poultry are raised, whether in large commercial operations or in small back-yard flocks, and economic losses can be significant. This paper will briefly review the major protozoan, helminth, and arthropod species in poultry including pathogenesis. Other topics will include the importance of the interaction of other diseases and parasites, and control of the infection by chemotherapy, management, and immunity.

Animal Husbandry↗
PubMed1994

The effect of the tetrathyridia of Mesocestoides corti on the livers and peripheral blood of three different strains of mice.

Three strains of male and female mice, CFLP, BALB/c and CBA/ca, were infected i.p. with the tetrathyridia of Mesocestoides corti and examined in groups of 5 at 0, 7, 14, 21, 28 and 42 days post-infection. At post-mortem the numbers of parasites both loose in the peritoneal cavity and in the liver tissue were counted, the livers weighted fresh and sections of liver stained to examine the inflammatory response, encapsulation of the tetrathyridia and for eosinophils, neutrophils, mast cells and plasma cells. BALB/c mice had significantly more parasites loose in the peritoneal cavity than CFLP and CBA/ca mice. Infected livers of all three strains were significantly heavier than control livers; the heaviest livers were those of the CFLP followed by the CBA/ca mice which also showed the greatest rate of weight increase. The tetrathyridia from the peritoneal cavities of the CBA/ca and CFLP mice were covered with a 'mucilage-like' substance. Tetrathyridia within the host capsules of the CBA/ca mice contained host cells. There was no strain difference with regard to numbers of tetrathyridia in the liver but male mice harboured significantly more parasites than females. Differences in the numbers of cell types within the liver were detected between the strains but no one strain showed any consistent pattern. There was an overall increase in total white blood counts as well as an increase in the number of eosinophils, monocytes, neutrophils and lymphocytes during the course of the infection.

Animals↗
PubMed1991

[Morphometric analysis of an Anoplocephala perfoliata population].

An Anoplocephala perfoliata population isolated from the caecum of a dead horse was analysed morphometrically. Besides the number of segments, length and width of strobila, the width of scolex and the last segment, in adult tapeworms the number of eggs per segment was counted. By the aid of these data the population was divided into 4 categories. The length of fixed tapeworms varied between 5.46 and 41.53 mm. There was an direct relation between length of the strobila and number of segments. Only 42 of 440 investigated tapeworms contained mature eggs in the uterus. The number of eggs varied between 125 and 4482. The beetle mite Scheloribates latipes could be infected successfully, 9 cysticercoids were isolated from their body cavity.

Animals↗
PubMed1997

Current status of food-borne parasitic zoonoses in South Africa and Namibia.

Epidemiological data on food-borne parasitic zoonoses in countries of southern Africa are sporadic. In a study of toxoplasmosis in South Africa, there was an overall prevalence of 21% (2, 147/10,228). Prevalences vary between the different cultural groups and from one geographical region to another. The prevalence rate for the San (Bushmen) people of Namibia and Botswana was 9% (65/725) compared to the 30% (190/635) found in the Indian and Black communities of Kwazulu-Natal province, South Africa. These variations are probably linked to the dietary habits of the different cultural communities. Cysticercosis appears to be most prevalent in the Eastern Cape Province (former Transkei), where pigs roam freely and sanitation facilities are inadequate or non-existent. Segments of tapeworms often feature as an ingredient of concoctions prepared by traditional healers and are suspected sources of many of the cases of cysticercosis in South Africa. Trichinella nelsoni has been identified in wild game in South Africa: so far no cases of infection in humans have been recorded. Cases of Sarcocystis have been identified in some instances but infection is probably underdiagnosed in the country.

Animals↗