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1998, Number 3

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Vet Mex 1998; 29 (3)

Survival of Haemonchus contortus infestant larvae (L3) in subwarm subhumid climate in México

Liebano HE, Vázquez PV, Fernández RM

Language: English/Spanish
References: 22
Page: 245-249
PDF size: 548.77 Kb.


Text Extraction

Haemonchus contortus larvae 3 (L3) was tested in a subhumid subwann climate AwO(w) during one year using motility as a measure of survival. For this purpose 400 m2, divided in 56 plots of 2 x 1m and seeded with Buffel grass (Cenchurus ciliaris), were alloted in two groups: short grass (10 cm), and high grass (20 cm). Two experimental plots were contaminated with 30.000 L3 each one every 15 days, and they were sampled on days 1,3,7,14,28 and every 28 days there after, until samples were negative to infective larvae. Samples were processed by the Baermann and larvae migration techniques. Pluvial precipitation, temperature and relative humidity were recorded at microclimate level, and the two last mentioned ones were also recorded at nanoclimate level. Higher H. contortus survival was observed for the months of October, November and December (280,140 and 224 days for grass; and 252,224 and 196 days for the ground). The lowest larvae survival was observed in January and February. In this study, the greatest survival of larvae was found in soil samples. Older larvae (280 and 252 days) were found in samples from tall grass. A positive correlation was observed between larvae survival and temperature, humidity and pluvial precipitation with correlation coefficients of 0.75 for microclimate and of 0.85 for nanoclimate.


REFERENCES

  1. Soulsby EJ. Parasitologia y enfermedades parasitarias en los animales domésticos. México (DF): Nueva Editorial Interamericana, 1987:215-235.

  2. Levine ND. Weather and the ecology of bursate nematodes. Int J Biometeorol 1980;24:341-345.

  3. Fernandez RM, Vazquez PV, Liebano HE. Development and recovery of Haemonchus contortus first larval stages on experimental plots in Mexico. Vet Parasitol 1989;51:263-269.

  4. Clark LG. Elementos de ecología. La Habana (Cuba): Instituto Cubano del Libro, 1975.

  5. Kenneth ST, Levine ND, Boatman AP. Effect of temperature on survival of free living stages of nematode Haemonchus contortus. Am J Vet Res 1976;37:991-992.

  6. Ravinovich I. Ecología de poblaciones animales. México (DF): CECSA, 1985.

  7. Nansen P. Production loses and control of helminths in ruminants of temperate regions. Int J Parasitol 1987;17:425-432.

  8. Rosenberg NJ. Microclimate. The biological environment. New York: John Wiley and Sons, 1974:302-315.

  9. Levine ND, Todd KS. Micrometeorological factors involved in development and survival of free-living stages of sheep nematodes Haemonchus contortus and Trichostrongylus colubriformis. Int J Biometeorol 1975;19:174-183.

  10. INEGI. Síntesis geográfica de Morelos. México (DF): Coordinación de Servicios Nacionales de Estadística, Geográfia e Informática (INEGI), Secretaría de Programación y Presupuesto, 1981.

  11. Liébano HE. Cultivo e identificación larvaria de nematodos del tracto gastroentérico. Diagnóstico de helmintos y hemoparásitos de rumiantes. México (DF): Asociación Mexicana de Parasitología Veterinaria, A.C., 1989.

  12. Liébano HE, Mejía GA. Modificación a la técnica de migración larvaria para forrajes en la obtención de larvas de nematodos gastroentéricos. Memorias de la V Reunión de Parasitologia Veterinaria. Toluca (Edo. de México): Asociación Mexicana de Parasitología Veterinaria, A.C, 1984:186-195.

  13. Boag BE, Thomas RL. Epidemiological studies on gastrointestinal nematode of sheep: the control of infection in lambs on clean pasture. Res Vet Sci 1977;22:62-67.

  14. Daniel VW. Biostadística, base para el análisis de las ciencias de la salud. México (DF): Limusa, 1982.

  15. Fincher GT, Stewart TB. Vertical migration by nematode larvae of cattle parasites. Thorough Soil USA Proc Helminth Soc Washington, 1979:46:43-46.

  16. Croll NA. Behavioural analisis of nematode movement. Adv Parasitol 1975;13:71-122.

  17. Quiroz RH. Parasitología y enfermedades parasitarias de los animales domésticos. México (DF): Limusa, 1984.

  18. Dunn AM. Helmintología veterinaria. 3a ed. México (DF): El Manual Moderno, 1983.

  19. Gwendoleen R. Observations on the vertical migrations of the 3rd stage of Haemonchus contortus on experimental plots of Lolium perenne in relation to meteorological factors. Parasitology 1981;4:1128-1135.

  20. Rosenberg NJ. Micrometeorological factors involved in development and survival of free living stages of sheep nematodes. Int J Biomet 1975;3:174-183.

  21. Smith LP. Metereological factors of importance in biological systems. Br Soc Parasitol 1974;12:13-32.

  22. Grant JL. Epizootiology of nematode parasites of sheep in a high-rainfall area in Zimbabwe. J SA Vet Assoc 1981;52:32-52.




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