Influence of advancement of age on intensity of strongyle infection and performance in sheep selected for resistance/resilience to infection

C P SWARNKAR; D SINGH; ASHISH CHOPRA; L L L PRINCE

doi:10.56093/ijans.v84i3.38698

Authors

C P SWARNKAR Central Sheep and Wool Research Institute, Avikanagar, Rajasthan 304 501 India
D SINGH Central Sheep and Wool Research Institute, Avikanagar, Rajasthan 304 501 India
ASHISH CHOPRA Central Sheep and Wool Research Institute, Avikanagar, Rajasthan 304 501 India
L L L PRINCE Central Sheep and Wool Research Institute, Avikanagar, Rajasthan 304 501 India

https://doi.org/10.56093/ijans.v84i3.38698

Keywords:

Age, Gastrointestinal nematodes, Growth, Haemonchus contortus, Performance, Sheep

Abstract

An analysis was made to observe the influence of advancement of age on intensity of strongyle infection (predominantly Haemonchus contortus) and performance in sheep (Malpura and Avikalin breed) selected for improving the genetic resistance / resilience to infection. All the data pertaining to faecal egg counts, body weights, greasy fleece yield and disposal rate were classified according to age as up to 1 yr, 1–2 yr, 2–3 yr, 3–4 yr, 4–5 yr and > 5 yr. The monthly intensity of strongyle infection showed similar influence of advancement in age of animal in both the resistant and susceptible lines of both the breeds. Intensity of strongyle infection was significantly higher in animals of S-line across all the age groups. Within line, animals up to 1 yr of age had significantly higher faecal egg counts, particularly during wormy season. Monthly intensity of infection showed marginal rise in R-line animals in older animals (>1 yr of age), and in animals >5 yr of age compared to those between 1–5 yr during wormy season. Within line, younger animals (up to 1 yr of age) had significantly higher average daily gain in body weight (21.45 g in S-line to 25.82 g in R-line of Malpura; 29.09 g in R-line to 29.45 g in S-line of Avikalin) compared to other age groups. In adult animals (> 1 yr of age) during summer (April to June), body weights were usually either maintained (in S-line) or reduced marginally (in R-line) without much appreciable difference. In monsoon season there was evident rise in magnitude of daily weight gain up to 2–3 yr of age in both the lines. There was nonsignificant variation in annual greasy fleece yield among both the divergent lines across all the age groups. The disposal profile revealed that maintenance of animals in resistant line without anthelmintic intervention had similar pattern of disposal as in animals of susceptible line maintained with anthelmintic intervention. The present study demonstrated that the animals selected for resistant line not only restricted the use of anthelmintics but also led to low contamination of pasture due to low mean FECs compared to their counterparts in susceptible line, which required one strategic drench every year and contributed more eggs on pasture in grazing area. Animals of resistant line served as valuable resource for refugia and maintenance of anthelmintic efficacy. The acquired resistance to strongyle infection in sheep was unaffected by advancement of age of animal.

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Author Biography

L L L PRINCE, Central Sheep and Wool Research Institute, Avikanagar, Rajasthan 304 501 India

References

Ali D A, Al-Zuhary M A and Affat A M. 1996. The effect of feeding level on the genetic resistance of local breed sheep infected with Haemonchus contortus. Iraqi Journal of Veterinary Medicine 19: 168–81.

Al-Zuhairy M A, Ali D A and Affat A M. 1997. The effect of sex on the genetic resistance of local sheep infected with Haemonchus contortus. Iraqi Journal of Veterinary Medicine 21: 69–80.

Baker R L, Watson T G, Bisset S A, Vlassoff A and Douch P G C. 1991. Breeding sheep in New Zealand for resistance to internal parasites: research results and commercial application. Breeding for Disease Resistance in Sheep. 19–32. (Eds) Gray G D and Woolaston R R.. Australian Wool Corporation, Melbourne.

Beriajaya S D and Copeman D B. 1996. Seasonal differences in the effect of nematode parasitism on weight gain of sheep and goats in Cigudeg west Java. Jurnal Ilmu Ternak dan Veteriner 2: 66–72.

Beriajaya S D and Copeman D B. 2006. Haemonchus contortus and Trichostrogylus colubriformis in pen-trails with Javanese thin tail sheep and Kacang cross Etawah goats. Veterinary Parasitology 135: 315–23.

Bishop S C, Bairden K, McKellar Q A, Park M and Stear M J. 1996. Genetic parameters for faecal egg count following mixed, natural, predominantly Ostertagia circumcincta infection and relationships with live weight in young lambs. Animal Science 63: 423–28.

Bisset S A, Morris C A, McEwan J C and Vlassoff A. 2001. Breeding sheep in New Zealand that are less reliant on anthelmintic to maintain health and productivity. New Zealand Veterinary Journal 49: 236–46.

Cernanska D, Varaday M and Corba J. 2005. The occurrence of sheep gastrointestinal parasites in the Slovak Republic. Helminthologia 42: 205–09.

Colditz I G, Watson D L, Gray G D and Eady S J. 1996. Some relationships between age, immune responsiveness and resistance to parasites in ruminants. International Journal for Parasitology 26: 869–77.

Douch P G C and Morum P E. 1993. The effect of age on the response of Romney sheep to gastrointestinal nematodes during grazing. International Journal for Parasitology 23: 651655.

Fishes S M and Say R R. 1989. Manual of Tropical Veterinary Parasitology. CAB, UK, pp. 342–47.

Good B, Hanrahan J P, Crowley B A and Mulcahy G. 2006. Texel sheep are more resistant to natural nematode challenge than Suffolk sheep based on faecal egg count and nematode burden. Veterinary Parasitology 136: 317–27.

Greeff J C, Karlsson L J E and Bessier R B. 1999. Breeding sheep for resistance to internal parasites. Proceedings of the Association for the Advancement of Animal Breeding and Genetics 13: 150–55.

Gregory P W, Miller R F and Stewart M A. 1940. An analysis of environmental and genetic factors influencing stomach-worm infestation in sheep. Journal of Genetics 39: 391–400.

MAFF. 1984. Manual of Veterinary Investigation. Vol. 2. Reference Book 390, Her Majesty’s Stationary Office, London, pp 161–87.

Magona J W and Musisi G. 2002. Influence of age, grazing system, season and agroclimatic zone on the prevalence and intensity of gastrointestinal strongylosis in Ugandan goats. Small Ruminant Research 44: 187–92.

McEwan J C, Mason P, Baker R L, Clarke J N, Hickey S M and Turner K. 1992. Effects of selection for productive traits on internal parasite resistance in sheep. Proceedings of the New Zealand Society of Animal Production 52: 53–56.

Nieuwoudt S W, Theron H E and Krüger L P. 2002. Genetic parameters for resistance to Haemonchus contortus in Merino sheep in South Africa. Journal of South African Veterinary Association 73: 4–7.

Nuruzzaman M, Haque M H, Sarker S and Begum N. 2012. Abomasal nematodes in goats slaughtered at different abattoir of Thakurgaon district, Bangladesh. Journal of Scientific Research 4: 491–97.

Sargison N D, Jackson F and Gilleard J S. 2011. Effects of age and immune suppression of sheep on fecundity, hatching and larval feeding of different strains of Haemonchus contortus. Veterinary Journal 189: 296–301.

Silverman P H and Patterson J E. 1960. Histrotrophic (parasites) stages in Haemonchus contortus. Nature (London) 185: 54– 55.

Singh D, Swarnkar C P, Prince L L L and Pathak K M L. 2011. Economic Analysis and Impact of Gastrointestinal Nematodes on Sheep Production in Rajasthan. Directorate of Knowledge Management in Agriculture, ICAR, New Delhi, pp 1–84.

Stear M J, Strain S and Bishop S C. 1999. Mechanisms underlying resistance to nematode infection. International Journal for Parasitology 29: 51–56.

Swarnkar C P and Singh D. 2012. An evaluation of conventional and strategic worm management schemes in sheep flocks of semi-arid Rajasthan. Indian Journal of Animal Sciences 82: 1482–88.

Swarnkar C P, Singh D, Krishna Lal and Khan F A. 2008. Epidemiology and Management of Gastrointestinal Parasites of Sheep flocks in Rajasthan. pp. 1–145. CSWRI. Avikanagar.

Tariq K A, Chishti M Z and Ahmad F. 2010. Gastro-intestinal nematode infections in goats relative to season, host sex and age from the Kashmir valley. Indian Journal of Helminthology 84: 93–97.

Tesfaheywet Z. 2012. Helminthosis of sheep and goats in and around Haramaya, Southeastern Ethiopia. Journal of Veterinary Medicine and Animal Health 4: 48–55.

Vlasoff A, Leathwick D M and Heath A C G. 2001. The epidemiology of nematode infections of sheep. New Zealand Veterinary Journal 49: 213–21.

Waruiru R M, Kyvsaard N C, Thamsborg S M, Nansen P, Bogh H O, Munyua W K and Gathuma J M. 2000. Prevalence and intensity of helminth and coccidial infections in dairy cattle in Central Kenya. Veterinary Research Communications 24: 39–53.