April-June, 2008; Volume 39: Issue 2
Vet Mex 2008; 39 (2)

Original research articles

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Use of the male effect to induce reproductive activity in ovine intensive breeding systems
José de Lucas Tron, Luis Alberto Zarco Quintero, Carlos Vásquez Peláez

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Comparison of four regression models for the study of herd risk factors for binomial correlated data
José C. Segura Correa, Antonio Salinas-Meléndez, José Jesús Solís Calderón

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The inoculation of Lactobacillus casei in NIH mice induces a protective response against Trypanosoma cruzi (Ninoa strain) infection
Carlos Ramón Bautista Garfias, María del Carmen Torres Álvarez

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Pathogenesis of Salmonella enteritidis PT 13a and Salmonella enteritidis biovar Issatschenko in broiler chickens
Griselda Ruiz Flores, Fernando Constantino Casas, José Antonio Quintana López

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Detection of subclinical bovine mastitis caused by mycoplasmosis by indirect ELISA test and isolation
César Núñez D, Elizabeth Morales Salinas, José Juan Martínez Maya, Laura Hernández A.

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Parasitic contamination by dog feces collected from the streets of San Cristobal de Las Casas, Chiapas, Mexico
Martínez-Barbabosa, Ignacio, Elena Marcia Gutiérrez Cárdenas, Edubiel Arturo Alpízar Sosa, Rodrigo de Jesús Pimienta Lastra

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Population fl uctuation of Haematobia irritans (Diptera: Muscidae) in a cattle herd in Tecoman, Colima, Mexico
Edelmira Galindo-Velasco, Cruz-Vázquez, Carlos, Roberto Lezama-Gutiérrez, Waldina Reyes-Velázquez

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Study on the osseous consolidation in rat by environmental scanning electron microscopy
Rosario Neri Basurto, Lilia Solís Arrieta, Hilda Villegas Castrejón

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Fodder trees and shrubs of the north-tzotzil region of Chiapas, Mexico
Guillermo Jiménez-Ferrer, Miriam López-Carmona, José Nahed-Toral, Susana Ochoa-Gaona, Ben de Jong

Short communications

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Presence of seropositive animals to the porcine respiratory and reproductive syndrome virus in Nuevo Leon
José Antonio Salinas Meléndez, Jorge Lara Arias, Héctor Flores Andrade, Ramiro Ávalos Ramírez

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Performance parameters and morphological changes in intestinal villi of broilers at 21 days of age by the inclusion of Saccharomyces cerevisiae cell walls
José Arce Menocal, Ernesto Ávila González, Carlos López Coello