Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Epidemiology of Oestrus ovis (Diptera: Oestridae) in sheep in Botucatu, State of São Paulo

Full text
Author(s):
Bruna Fernanda da Silva [1] ; César Cristiano Bassetto [2] ; Alessandro Francisco Talamini do Amarante [3]
Total Authors: 3
Affiliation:
[1] Universidade Estadual Paulista. Instituto de Biociências. Departamento de Parasitologia - Brasil
[2] Universidade Estadual Paulista. Instituto de Biociências. Departamento de Parasitologia - Brasil
[3] Universidade Estadual Paulista. Instituto de Biociências. Departamento de Parasitologia - Brasil
Total Affiliations: 3
Document type: Journal article
Source: Revista Brasileira de Parasitologia Veterinária; v. 21, n. 4, p. 386-390, 2012-12-00.
Abstract

The seasonal factors that influence Oestrus ovis infestation in sheep were determined in Botucatu, State of São Paulo, Southwestern Brazil, from April 2008 to March 2011. Two tracer lambs were monthly exposed to natural infestation by O. ovis larvae for 28 consecutive days, by grazing with a sheep flock. Tracer animals were then euthanized and the larvae of O. ovis recovered from nasal and sinus cavities. Of the 72 tracer lambs, 50% were infested with O. ovis larvae and the mean intensity of infestation per head infested was 16.8 larvae, with an average of 7.8 L1, 5.3 L2 and 3.7 L3. O. ovis larvae were present during the four seasons of the year, but the mean larval burden was significantly higher during the spring and summer months, compared to winter (P < 0.05). The highest rate of larvae recovery coincided with mean temperatures between 20 °C and 25 °C and air relative humidity around 70%. Results suggest that evolution and development of O. ovis practically occurs throughout the entire year, with larval infestation especially frequent during the spring and summer months. (AU)

FAPESP's process: 09/03504-4 - Protection of cattle against Haemonchus placei and Haemonchus contortus after immunization with antigens from the intestinal membrane of H. contortus.
Grantee:César Cristiano Bassetto
Support Opportunities: Scholarships in Brazil - Master