In cool temperate areas, such as Scotland, sheep are infected by a variety of nematodes but the dominant nematode is Teladorsagia circumcincta. Resistant animals have one or more of the following features: fewer adult nematodes, more inhibited larvae, shorter adult nematodes and decreased production of nematode eggs. In lambs at the end of the first grazing season, the heritability of adult wor...

Worm-free Merino yearlings were dosed with either a mixture of infective larvae of Trichostrongylus axei and Ostertagia circumcincta or with O. circumcincta only, and challenged 90-93 days later with infective larvae of Haemonchus contortus. Neither of these methods protected sheep against challenged and slight protection was afforded sheep predosed with T. axei and O. circumcincta and challeng...

The aim of this study was to determine the potential essential oils (EOs) thyme (Thymusvulgaris Lamiaceae) and ginger (Zingiberofficinale Zingiberaceae) control cotton leaf worm (Spodopteralittoralis Lepidoptera: Noctuidae)under laboratory conditions.The nutritional indices EO-treated S. littoralis larvae were reduced compared with control. At highest tested conc. 90 % oils, CI values significa...

Aspects of the life cycle of the nematomorph Gordius robustus were investigated. Gordius robustus larvae fed to Tenebrio molitor (Coleoptera: Tenebrionidae) readily penetrated and subsequently encysted in the posterior portion of the midgut wall. Parasite development was then arrested in each infected beetle. Upon feeding these cysts to laboratory-reared Gryllus firmus, worm larvae developed to...

The relationship between filarial antigenemia and lymphatic pathology was investigated in residents of 11 villages in an area of Papua New Guinea where Wuchereria bancrofti is endemic. Antigenemia was determined in 1322 persons by means of the Og4C3 antibody capture assay. Prevalence of antigenemia by village ranged from 61.7% to 98.2% and did not vary by sex. Antigen level increased with trans...

Angiostrongylus cantonensis, A. costaricensis, and A. vasorum are etiologic agents of human parasitic diseases. Their identification, at present, is only possible by examining the adult worm after a 40-day period following infection of vertebrate hosts with the third-stage larvae. In order to obtain a diagnostic tool to differentiate larvae and adult worm from the three referred species, polyme...

DAwKINs H. J. S. and GROVED. I. 1981 Kinetics of primary and secondary infections with Sfrongyloides ratti in mice. International Journalfor Parasitology 11: 89-96. The kinetics of infection with S. ratfi were quantitated in normal and previously exposed C57B1/6 mice. In primary infections, larvae penetrated the skin rapidly and were seen in peak numbers 12 h after infection. By 24 h after infe...

A group of 12 10-month-old, worm-free Merino lambs were given a single injection of disophenol at 10 mg/kg. This group and another group of 12 worm-free lambs were infested with infective larvae of Haemonchus contortus 1-3 times a week with a maximum dose of 4000/week from 0-91 days. From 95-168 days the dose was increased to a maximum of 6000/week. Every 7 days faeces were examined for worm eg...

REINECKE, R. K. An anthelmintic test for gastro-intestinal nematodes of cattle. Onderstepoort]. vet. Res. 39(3), 153-178 (1972). Suitable experimental groups of calves for controlled anthelmintic tests were created by repeatedly dosing susceptible worm-free animals orally with infective larvae of Haemonchus placei, Osterta,~ia ostertagi, Oesophagostomum radiatttm and Cooperia spp. (C. pectinata...

Dracunculusmedinensis (a little dragon from Medina) is responsible for Dracunculiasis, popularly known as “guinea worm disease”. The Cyclops is the intermediate host that ingests the larvae of parasite (D.medinensis), that later on ingested by the human from the contaminated stagnant unfiltered water from thewater source. After ingestion these Cyclops are disintegrated by stomach digestive juic...