Hostname: page-component-78c5997874-mlc7c Total loading time: 0 Render date: 2024-11-19T14:37:53.338Z Has data issue: false hasContentIssue false
  • English
  • Français

Relationship between the excretion of protostrongylid larvae in sheep in North-west Spain and climatic conditions

Published online by Cambridge University Press:  05 June 2009

P. Díez-Baños ,
P. Morrondo-Pelayo ,
A. Feijoo-Penela ,
B. Carrillo-González  and
C. López-Sández
P. Díez-Baños
Affiliation:
Parasitología y Enfermedades Parasitarias, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27071 Lugo, Spain
P. Morrondo-Pelayo
Affiliation:
Parasitología y Enfermedades Parasitarias, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27071 Lugo, Spain
A. Feijoo-Penela
Affiliation:
Parasitología y Enfermedades Parasitarias, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27071 Lugo, Spain
B. Carrillo-González
Affiliation:
Parasitología y Enfermedades Parasitarias, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27071 Lugo, Spain
C. López-Sández
Affiliation:
Parasitología y Enfermedades Parasitarias, Facultad de Veterinaria, Universidad de Santiago de Compostela, 27071 Lugo, Spain
Get access Rights & Permissions [Opens in a new window]

Abstract

The relationship between different climatic factors (temperature, relative humidity and rainfall) and the pattern of lungworm larval excretion was studied in sheep under a continuous grazing pattern in North-west Spain, where the climate is intermediate between sub-humid Mediterranean with an Atlantic tendency and European Atlantic. Over a period of one year, 44 animals were sampled once a month at random from a flock of 80 Galician breed sheep, all over 4 years old. Faeces were taken directly from the rectum and the number of first stage larvae per gram of faeces was determined for each animal, and the species of Protostrongylidae (Nematoda) identified. Larval excretion was irregular during the study. The prevalence and intensity of infection were greater in the colder months (40.9%; x=12.3 ± 40.4) and less in the warmer months The species of Protostrongylidae identified and prevalences (%) were Neostrongylus linearis (71.5), Muellerius capillaris (18.8) and Cystocaulus ocreatus (9.7). Between November and March, with low temperatures, the prevalence and intensity of parasitism with N. linearis and M. capillaris were greater than in the months with high temperatures (May to September). Multiple linear regression analysis showed statistical correlation between temperature, relative humidity and rainfall considered together and the number of N. linearis larvae per gram of faeces. Linear regression showed a correlation between the temperature and the percentage of sheep that passed M. capillaris. In general, the prevalence and intensity of infection of the sheep with N. linearis, M. capillaris and C. ocreatus larvae decrease when the temperature increases and increase when the relative humidity and rainfall increases.

Type
Research Papers
Information
Journal of Helminthology , Volume 68 , Issue 3 , September 1994 , pp. 197 - 201
Copyright
Copyright © Cambridge University Press 1994

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Boev, S.N. (1975) in Ryzhikov, M.M. (Ed.) Principles of nematodology. XXV Protostrongilidy. 648 pp. Moscow, lzdatel'stovo Nauka.Google Scholar
Brunet, J. (1981) Le parasitisme des caprins dans l'Ardèche (1977–1978–1979). Bulletin des G.T.V. 3, 58–66.Google Scholar
Cabaret, J. (1986) Répartition géographique des Protostrongylidés des ovins. Fréquence et importance de cette parasitose pulmonaire en Europe et en Afrique du Nord. Epidémiologie et Santé Animale 10, 61–72.Google Scholar
Cabaret, J., Dakkak, A. & Bahaïda, B. (1980) On some factors influencing the output of the larvae of protostrongylids of sheep in natural infections. The Veterinary Quarterly 2, 115–120.CrossRefGoogle Scholar
Cabaret, J., Riseani, S.R. & Baeza, E. (1991) Survival of sheep and goat first stage protostrongylid larvae in experimental conditions: influence of humidity and temperature. Journal of Helminthology 65, 201–207.CrossRefGoogle ScholarPubMed
Carballeira, A., Devesa, C., Retuerto, R., Santillan, F. & Ucieda, F. (1983) Bioclimatología de Galicia. Fundación Barrie de la Maza, La Coruña, Spain.Google Scholar
Cordero, M. & Castañtón, L. (1989) Epidemiología de las protostrongilidosis ovinas. Pro Veterinario 9, 2–3.Google Scholar
Díez-Baños, P., Cabaret, J. & Morrondo-Pelayo, P. (1993) Comparative survival of first-stage larvae of small lungworms Muellerius capillaris and Neostrongylus linearis of goats in alfalfa and ryegrass plots. Veterinary Research 24, 266–271.Google ScholarPubMed
Forrester, D.J. & Little, R.C. (1976) Influence of rainfall on lungworm infections in bighorn sheep. Journal of Wildlife Diseases 12, 48–51.CrossRefGoogle ScholarPubMed
Kulmamatov, E.N., Isakova, D.T., Zimin, Yu.M. & Azimov, D.A. (1977) [The biology of Protostrongylus skrjabini (Boev, 1936)]. Materialy Nauchnoǐ Konferentsii Vsesoyuznogo Obshchestva Gelmintologov (Trematody i trematodozy) 29, 66–74.Google Scholar
Martínez, C. (1992) Estudio epidemiológico de las nematodosis pulmonares ovinas en Galicia: influencia de las condiciones naturales y controladas sobre el desarrollo larvario de Neostrongylus linearis (Marotel, 1913) Gebauer, 1932 en Cochlicella barbara L., 1758, infestada experimentalmente. Tesis Doctoral. Facultad de Veterinaria de León.Google Scholar
Morrondo-Pelayo, P., Díez-Baños, P. & Cabaret, J. (1992a) Influence of desiccation of faeces on survival and infectivity of first-stage larvae of Muellerius capillaris and Neostrongylus linearis. Journal of Helminthology 66, 213–219.CrossRefGoogle ScholarPubMed
Morrondo-Pelayo, P., Díez-Baños, P., Mezo-Menéndez, M., Díez-Baños, N. & Flores-Calvete, G. (1992b) Natural infection of Cochlicella barbara (Mollusca) by Protostrongylidae (Nematoda) in paddocks with different grass heights in the Northwest of Spain: periods of risk for the definitive hosts. Annales de Parasitologie Humaine et Comparèe 67, 180–187.CrossRefGoogle Scholar
Ollerenshaw, C.B. (1974) Forecasting liver fluke disease. 12th Symposium of the British Society of Parasitology, pp. 33–52.Google Scholar
Prieto-Novoa, M., Morrondo-Pelayo, P., López-Sández, C. & Díez-Baños, P. (1993) Survival of first-stage Neostrongylus linearis larvae in ovine faeces under environmental conditions in Galicia (North-west Spain). Annales de Parasitologie Humaine et Comparèe 68, 38–42.CrossRefGoogle ScholarPubMed
Rainírez, A.P. (1967) Epizootiología de las bronconeumonías verminosas ovinas en León. Anales de la Facultad de Veterinaria de León 13, 135–210.Google Scholar
Reguera, A., Cordero, M. & Rojo, F.A. (1983) Variaciones en la eliminación larvaria de Protostrongylidae (Nematoda) en la oveja en relación con la climatología. pp. 209–220 in Libro en honor del Profesor Dr. Carlos Sánchez Botija. Madrid, Spain.Google Scholar
Simón, F. & Ramajo, V. (1976) Los Protostrongylidae de Salamanca, sus hospedadores y frecuencia. Anuario, Centro de Edafología y Biología Aplicada CSIC Instituto de Orientación y Asistencia Técnica del Oeste 3, 59–62.Google Scholar
Thomson, E.F. & Orita, G. (1988) Seasonal prevalence of protostrongylid and Dictyocaulus species of lungworms in Awassi sheep in north-west Syria. Tropical Animal Health Production 20, 187–189.CrossRefGoogle ScholarPubMed