Gabriel Ramírez-Várgas

ORCID: 0000-0002-0059-8810
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About
Contact & Profiles
Research Areas
  • Helminth infection and control
  • Parasite Biology and Host Interactions
  • Parasites and Host Interactions
  • Coccidia and coccidiosis research
  • Parasitic Infections and Diagnostics
  • Animal Nutrition and Physiology
  • Pharmacological Effects and Assays
  • Insect and Pesticide Research
  • Genetic and phenotypic traits in livestock
  • Plant and fungal interactions
  • Entomopathogenic Microorganisms in Pest Control
  • Insect Resistance and Genetics
  • Agriculture and Rural Development Research
  • Livestock and Poultry Management

Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias
2012-2019

Instituto Nacional de Salud Pública
2019

Universidad Veracruzana
1992

Gastrointestinal parasite infections represent a major welfare problem in small ruminants reared extensive systems, which may be exacerbated by anthelmintic resistance. Therefore, we aimed to study the efficacy of albendazole and ivermectin sheep. Eighty-six animals were selected from commercial farms temperate area State Mexico at age seven months. These randomly distributed into three groups: Group A, treated with albendazole, I, C, left untreated. Faecal samples collected before was...

10.3390/ani9100775 article EN cc-by Animals 2019-10-10

Summary The expression profiles of cytokines and antioxidant genes were determined from an experimental infection with H. contortus in Pelibuey lambs. was followed for 34 days (d) to determine the number eggs per gram (epg) packed cell volume ( PCV ). Differential white counts profile estimations IL ‐2, ‐4, ‐5, ‐6, ‐8, ‐10, ‐13, FC ε R1A, GPX SOD 1 at 0 hour, 4 hours, 2 14 post‐infection PI ) infected control groups. Comparison fold change between 4‐hours, 4‐hours 2‐days 2‐ 14‐days periods...

10.1111/pim.12427 article EN Parasite Immunology 2017-03-27

Haemonchus contortus is a parasitic nematode of Pelibuey sheep, meat breed used in tropical regions. Due to anthelmintic problems, the identification hosts resistant H. another option control. The aim this study was analyse relative expression IL-5 and IL-6 genes sheep after infection. Nineteen lambs infected with three more without infection were studied. haemonchosis determined by number eggs per gram faeces (epg) estimation percentage packed cell volume (%pcv). Peripheral blood...

10.1111/pim.12211 article EN Parasite Immunology 2015-06-20

Summary This study determined the efficacies of four classes anthelmintics (AH) in a goat flock where anthelmintic resistance (AR) to ivermectin was suspected. We selected and randomly distributed 105 animals with >500 eggs per gram feces into seven groups 15 animals: an untreated control group treated ivermectin, eprinomectin, albendazole sulfoxide, albendazole, levamisole, closantel. The goats were individually weighed recommended dose. Fecal samples collected 14 days post-treatment...

10.1515/helm-2017-0037 article EN cc-by-nc-nd Helminthologia 2017-09-17

Abstract Because of the natural adaptation Mexican sheep, aim present study was to identify presence or absence gastrointestinal parasitic nematodes (GIN) resistant benzimidazole (BZ) in both Chiapas and Pelibuey sheep breeds on local farms. Both male female GIN-infected grazing two were selected. Sheep faecal samples collected obtain infective larvae (L3). This evolving stage parasite used for taxonomic identification genus, based its morphological characteristics. BZ anthelmintic...

10.1017/s0022149x13000618 article EN Journal of Helminthology 2013-10-15

Bacillus thuringiensis is an entomopathogenic bacterium that produces crystal-proteins with cytotoxic activity against insects and nematodes. B. toxicity on agriculture pests widely recognized, however, there little information about the lethal action of Recently, nematicide proteins was showed Haemonchus, Teladorsagia, Nippostrongylus, Ancylostoma genera mammals, plant parasitic nematodes, Globodera Meloidogyne. From a list strains effect, selected from IB-16 isolate 50 to 100 % nematocidal...

10.22319/rmcp.v3i1.1250 article EN Revista Mexicana de Ciencias Pecuarias 2012-01-01

ObjectivesFor years the Livestock Corporation of Costa Rica (Corporacion Ganadera, CORFOGA) has been gathering extensive cut-out data with an aim to establish a primary segregation carcasses by sex class and then yield grades. Despite efforts CORFOGA associated academic groups, no reports were found on prediction equations for estimating cutability Rican beef carcasses. Hence, from 292 carcasses, representing cattle produced in different regions under similar conditions (fed...

10.22175/rmc2017.101 article EN cc-by Meat and Muscle Biology 2017-01-01
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