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Recent studies on dictyocaulus filaria and other lungworms of sheep and goats in india


, : Recent studies on dictyocaulus filaria and other lungworms of sheep and goats in india. Journal of Nuclear Agriculture & Biology 11(1): 1-5

Additional areas of the country were surveyed for lungworm infections in sheep and goats. More sheep than goats and more sheep of the private breeders than of government flocks were found infected. Infection with D. filaria and unidentified species of Varestrogylus and Protostrongylus were reported from sheep and goats and Muellerius spp. only from sheep. Studies in the Chokla breed of lambs showed that a dose of 150 third stage larvae of D. filaria/kg body wt to a 4-6 mo. old lamb (150 l/kg) was the most suitable dose for establishment of infection in lambs for D. filaria vaccine work. It was possible to reduce this primary dose of infection in lambs to only 75 l/kg, without significantly affecting the total estimated larval yields during patency, provided infected lambs were treated with a total dose of 14 mg of betamethasone, administered in divided doses either during days 5-15 or days 30-40 of infection. About 0.36 million lambs were successfully immunized against D. filaria in the endemic areas with the vaccine produced at the Srinagar laboratory. Lambs infected with D. filaria at the time of vaccination developed poor protection following vaccination in comparison to lambs free from the infection. This posed a problem in the field of stimulating a satisfactory protection in lambs found infected with D. filaria at the time of vaccination. Very young lambs, aged 6-10 wk, were effectively protected against D. filaria by vaccination under field conditions. Goats are more susceptible hosts to D. filaria than sheep. Laboratory studies have shown that young kids, like lambs, can be effectively immunized against D. filaria by double vaccination with 50-krad .gamma.-irradiated larvae.

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Related references

Dhar, DN., 1982: Recent studies on Dictyocaulis filaria and other lungworms of sheep and goats in India. Additional areas of the country were surveyed for lungworm infections in sheep and goats. More sheep than goats and more sheep of the private breeders than of government flocks were found infected. Infection with D. filaria and unidentified specie...

Shaw, J.N., 1934: Lungworms (Dictyocaulus filaria Rudolphi) in Sheep and Goats. Among these miscellaneous observations on D. filaria in sheep Shaw here reports on the clinical result of feeding doses of from 400 to 26, 000 infective larvae to lambs. In some of the groups the growth of infected lambs was found to be considerab...

Monnig, H.O., 1940: Treatment against lungworms (Dictyocaulus filaria) in sheep. Monnig's experiments in sheep with intratracheal injections of iodine and pyrethrin solutions were ineffective in removing Dictyocaulus filaria, although the egg output appeared to be reduced for a number of days. The administration was done...

Kandels, R., 1984: Lungworms of sheep in Hesse: studies on the infection rates of Dictyocaulus filaria and protostrongylids and the seasonal dynamics of larval output under different management systems. Literature references on the prevalence and age variations of Dictyocaulus filaria, Muellerius, Capillaria, Protostrongylus rufescens, P. brevispiculum, Cystocaulus ocreatus and Neostrongylus linearis in sheep in Germany, other European countries...

Dhar, D.N.; Sharma, R.L., 1978: Studies on the comparative susceptibility of sheep and goats to infection with dictyocaulus filaria. Two groups of healthy, worm-free male lambs and kids were infected with D. filaria infective larvae at 100 larvae/kg body weight. Severity of the disease and worm establishment in the lungs were greater in goats than in sheep. This confirms that g...

Vodrazka, J.; Sokol, J.; Berecky, I., 1960: Part II-Critical tests with cyanacethydrazide against the sheep lungworms-Dictyocaulus filaria and Protostrongylus rufescens. II. Using this method, subcutaneous injection of cyanacethydrazide at various dose rates was found to be highly effective against Dictyocaulus filaria in sheep carrying light infestations, but ineffective against Protostrongylus rufescens. J. H.

Gothe, R.; Kandels, R., 1984: Lungworms in sheep in Hessen: prevalence of Dictyocaulus filaria and Protostrongylinae and seasonal dynamics of larval excretion in different husbandry systems. Faecal samples from sheep flocks kept under different management conditions were examined for lungworm larvae. In stationary flocks tended by a shepherd and in flocks kept in paddocks, 70-80% of sheep harboured one or more species of metastrongyle...

Gothe, R.; Kandels, R., 1984: Lungworms in sheep in Hesse: incidence of Dictyocaulus filaria and protostrongylids as well as seasonal dynamics of larval excretion under various management systems. Berliner und Munchener Tierarztliche Wochenschrift 97(10): 359-366

Wilson, G.I., 1966: Investigations on the pathogenicity and immunology of Dictyocaulus filaria in sheep and goats. filaria was more pathogenic to goats than to sheep. Eight of 13 kids given 2, 500-5, 000 larvae died from anoxia or congestive heart failure. Four of 12 lambs died from similar exposure. Animals which did not die usually had respiratory distress a...

Wilson, G.I., 1970: The strength and duration of immunity to Dictyocaulus filaria infection in sheep and goats. Fourteen sheep and 14 goats that had recovered from oral doses of 517-8, 000 infective D. filaria larvae, and four naturally infected ewes, were challenged from 1 1/2 to 46 months after the initial infection with 7, 500-60, 000 larvae. They were k...