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Adaptation to arid environment: Haemonchus longistipes in dromedaries of Saharo-Sahelian areas of Mauritania.
Vet Parasitol. 1996 Nov 15; 66(3-4):193-204.VP

Abstract

The adaptations of the trichostrongylid nematode Haemonchus longistipes of dromedaries (Camelus dromedarius) to the harsh environment of Saharo-Sahelian climate were assessed by means of (i) an epidemiological survey of dromedary infection in the south-west of Mauritania, (ii) an estimate over a 3 year period of parasite distribution within the host population and of prolificacy of H. longistipes females recovered from natural populations of infected dromedaries sampled at Nouakchott's slaughterhouse, and (iii) experimental infections of young dromedaries during three different periods of the year (end of the rainy season, middle and end of the dry season). Egg excretions (estimated by faecal egg counts), infective larvae derived from eggs as well as female prolificacy showed a marked seasonal pattern: high values in the rainy season and very low values in the dry season (especially March and April). Female prolificacy differed slightly between morphotypes: the knobbed type excreting over a longer period than the linguiform and smooth types. Following experimental infections in young dromedaries, arrest of larval development took place irrespective of the period. The survival strategy of H. longistipes in the dry season was based only on arrested larval development. Patent infections occurred from July to October, i.e. during the rainy season and was facilitated by the conjunction of high prevalence and intensity of adult worm burdens associated with high female prolificacy.

Authors+Show Affiliations

Service de Parasitologie, CNERV, Nouakchott, Mauritania.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

9017882

Citation

Jacquiet, P, et al. "Adaptation to Arid Environment: Haemonchus Longistipes in Dromedaries of Saharo-Sahelian Areas of Mauritania." Veterinary Parasitology, vol. 66, no. 3-4, 1996, pp. 193-204.
Jacquiet P, Cabaret J, Dia ML, et al. Adaptation to arid environment: Haemonchus longistipes in dromedaries of Saharo-Sahelian areas of Mauritania. Vet Parasitol. 1996;66(3-4):193-204.
Jacquiet, P., Cabaret, J., Dia, M. L., Cheikh, D., & Thiam, E. (1996). Adaptation to arid environment: Haemonchus longistipes in dromedaries of Saharo-Sahelian areas of Mauritania. Veterinary Parasitology, 66(3-4), 193-204.
Jacquiet P, et al. Adaptation to Arid Environment: Haemonchus Longistipes in Dromedaries of Saharo-Sahelian Areas of Mauritania. Vet Parasitol. 1996 Nov 15;66(3-4):193-204. PubMed PMID: 9017882.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Adaptation to arid environment: Haemonchus longistipes in dromedaries of Saharo-Sahelian areas of Mauritania. AU - Jacquiet,P, AU - Cabaret,J, AU - Dia,M L, AU - Cheikh,D, AU - Thiam,E, PY - 1996/11/15/pubmed PY - 1996/11/15/medline PY - 1996/11/15/entrez SP - 193 EP - 204 JF - Veterinary parasitology JO - Vet. Parasitol. VL - 66 IS - 3-4 N2 - The adaptations of the trichostrongylid nematode Haemonchus longistipes of dromedaries (Camelus dromedarius) to the harsh environment of Saharo-Sahelian climate were assessed by means of (i) an epidemiological survey of dromedary infection in the south-west of Mauritania, (ii) an estimate over a 3 year period of parasite distribution within the host population and of prolificacy of H. longistipes females recovered from natural populations of infected dromedaries sampled at Nouakchott's slaughterhouse, and (iii) experimental infections of young dromedaries during three different periods of the year (end of the rainy season, middle and end of the dry season). Egg excretions (estimated by faecal egg counts), infective larvae derived from eggs as well as female prolificacy showed a marked seasonal pattern: high values in the rainy season and very low values in the dry season (especially March and April). Female prolificacy differed slightly between morphotypes: the knobbed type excreting over a longer period than the linguiform and smooth types. Following experimental infections in young dromedaries, arrest of larval development took place irrespective of the period. The survival strategy of H. longistipes in the dry season was based only on arrested larval development. Patent infections occurred from July to October, i.e. during the rainy season and was facilitated by the conjunction of high prevalence and intensity of adult worm burdens associated with high female prolificacy. SN - 0304-4017 UR - https://www.unboundmedicine.com/medline/citation/9017882/Adaptation_to_arid_environment:_Haemonchus_longistipes_in_dromedaries_of_Saharo_Sahelian_areas_of_Mauritania_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-4017(96)01021-7 DB - PRIME DP - Unbound Medicine ER -