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Results for “Parasite Control”

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At least 91 records · Page 5Linked to original sources
PubMed1995

The practicality and sustainability of vaccination as an approach to parasite control.

The development of a successful vaccine depends not only on the production of the vaccine itself, but also on the design pf the vaccination programme. This involves a better understanding of the epidemiology of the disease to be controlled, the delivery system to be used and the costs involved. This review focuses on current understanding of parasite population dynamics and epidemiology, and on the logistic experience gained from immunization programmes using existing viral and bacterial vaccines. The feasibility and sustainability of any new vaccine would greatly benefit from research into epidemiology and health systems which are conducted in parallel, rather than sequential to, vaccine development.

Animals↗
PubMedDate not supplied

[Methodological assurance of natural and drinking water parasitic control].

The paper shows it necessary to exercise control over the quality of natural, waste, and portable water in terms of parasitological indices. The standard techniques of sampling and sanitary and parasitological studies of water, which allow water quality control to be effectively exercised in accordance with the current sanitary regulations, are considered.

Animals↗
PubMed2006

The use of chicory for parasite control in organic ewes and their lambs.

The aim of the present study was to investigate the potential benefits of grazing lactating ewes and their lambs on chicory (Cichorium intybus). Fifty-six certified organic twin-rearing ewes were either drenched with an anthelmintic or not, within 2 days after parturition and were grazed upon either grass/clover or chicory pastures. Around 12 weeks after parturition a subset of 12 lambs per treatment was slaughtered for worm number and parasite species determination. The faecal egg counts of lambs from undrenched ewes grazing on chicory were significantly lower than those of lambs from undrenched ewes grazing on grass. Lambs grazing on chicory had similar abomasal worm counts as those grazing on grass at 12 weeks of age; the predominant species was Teladorsagia circumcincta. There was no difference between the intestinal worm counts in lambs grazing on grass or chicory, with Trichostrongylus vitrinus being the predominant species. Liveweight gains over the 126-day experimental period were significantly higher in lambs from drenched than those from undrenched ewes. Lambs from undrenched ewes grazing on chicory had higher liveweight gains compared to those from undrenched ewes grazing on grass. Although chicory grazing did not affect ewe nematode egg excretion, it resulted in lower egg counts in lambs and improved their liveweight gains to the same level as those deriving from drenched ewes.

Agriculture↗
PubMedDate not supplied

Oestrus ovis in sheep: relative third-instar populations, risks of infection and parasitic control.

Oestrus ovis (L.) (Diptera: Oestridae), the nasal bot fly, has a relatively short free-living life cycle outside of the host, and therefore it is necessary to know when the parasitic period occurs in order to prevent the clinical signs and economic losses caused by this parasite. The length of this parasitic portion of the life cycle is quite variable: a few weeks to several months depending on the season and climatic conditions. Surveys of Oestrus ovis larval populations in sheep show different results on the number of generations according to the local climate. Mean monthly larval profiles of L1 and L3 burdens of sheep from West African Sahelian countries, Mediterranean countries (Morocco, Tunisia and Sicily) and Southwest France were compared. Valuable information on the suspected extension of the fly season is obtained showing the period of infection in each area. This knowledge will be a valuable tool to help in choosing the right treatment at the right period.

Africa, Northern↗