Classification of productive hair ewes using hematocrit as a marker of resistance to gastrointestinal nematodes
Background: The selection of sheep with high genetic resistance to gastrointestinal nematodes is a sustainable alternative for parasite control. Aim: This study was performed to categorize three breeds of hair sheep according to their resistance to gastrointestinal nematodes during the peripartu...
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| Format: | Article |
| Language: | English |
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Tripoli University
2025-02-01
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| Series: | Open Veterinary Journal |
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| Online Access: | http://www.ejmanager.com/fulltextpdf.php?mno=229468 |
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| author | María Guadalupe Pulido López Roberto Gonzalez Garduño Gerardo Jimenez Penago Glafiro Torres Hernandez Maritza Zaragoza Vera Josue Jonathan Ríos Hilario María Guadalupe Zambrano Velasco |
| author_facet | María Guadalupe Pulido López Roberto Gonzalez Garduño Gerardo Jimenez Penago Glafiro Torres Hernandez Maritza Zaragoza Vera Josue Jonathan Ríos Hilario María Guadalupe Zambrano Velasco |
| author_sort | María Guadalupe Pulido López |
| collection | DOAJ |
| description | Background:
The selection of sheep with high genetic resistance to gastrointestinal nematodes is a sustainable alternative for parasite control.
Aim:
This study was performed to categorize three breeds of hair sheep according to their resistance to gastrointestinal nematodes during the peripartum period using hematocrit (HCT) and to compare these results with categorizations derived from the nematode egg count per gram of feces (EPG).
Methods:
Parasitological records from two studies involving 46 Katahdin × Pelibuey and 25 Blackbelly ewes were used, along with information from pregnancy (week 22) to lactation (week 13) of a flock of 31 Pelibuey ewes. All ewes of the three breeds were naturally infected by grazing. The ewes were categorized as resistant, intermediate, or susceptible in each breed and by physiological stage (gestation or lactation) using the EPG ± three standard errors. We also categorized ewes based on their HCT ± one standard deviation.
Results:
During pregnancy, resistant ewes were those with less than 257, 148, and 96 EPG for the Blackbelly, Katahdin, and Pelibuey breeds, respectively, while in lactation, resistant ewes had less than 1587, 912, and 310 EPG, respectively. In the classification by HCT, Blackbelly ewes had values lower than 31.0%; therefore, only intermediate (HCT of 24.4%–31.0%) and susceptible ewes (HCT [Open Vet J 2025; 15(2.000): 871-884] |
| format | Article |
| id | doaj-art-64b603ae49f84702aee46a5e9c31cfb4 |
| institution | OA Journals |
| issn | 2226-4485 2218-6050 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Tripoli University |
| record_format | Article |
| series | Open Veterinary Journal |
| spelling | doaj-art-64b603ae49f84702aee46a5e9c31cfb42025-08-20T02:11:55ZengTripoli UniversityOpen Veterinary Journal2226-44852218-60502025-02-0115287188410.5455/OVJ.2025.v15.i2.36229468Classification of productive hair ewes using hematocrit as a marker of resistance to gastrointestinal nematodesMaría Guadalupe Pulido López0Roberto Gonzalez Garduño1Gerardo Jimenez Penago2Glafiro Torres Hernandez3Maritza Zaragoza Vera4Josue Jonathan Ríos Hilario5María Guadalupe Zambrano Velasco6Km 7.5 Carretera Teapa-V. Guerrero, Teapa, Tabasco. Km 7.5 Carretera Teapa-V. Guerrero, Teapa, Tabasco. Montecillos, estado de Mexico. Montecillos, estado de Mexico. Villahermosa, Tabasco, Mexico Montecillos, estado de Mexico. Montecillos, estado de Mexico.Background: The selection of sheep with high genetic resistance to gastrointestinal nematodes is a sustainable alternative for parasite control. Aim: This study was performed to categorize three breeds of hair sheep according to their resistance to gastrointestinal nematodes during the peripartum period using hematocrit (HCT) and to compare these results with categorizations derived from the nematode egg count per gram of feces (EPG). Methods: Parasitological records from two studies involving 46 Katahdin × Pelibuey and 25 Blackbelly ewes were used, along with information from pregnancy (week 22) to lactation (week 13) of a flock of 31 Pelibuey ewes. All ewes of the three breeds were naturally infected by grazing. The ewes were categorized as resistant, intermediate, or susceptible in each breed and by physiological stage (gestation or lactation) using the EPG ± three standard errors. We also categorized ewes based on their HCT ± one standard deviation. Results: During pregnancy, resistant ewes were those with less than 257, 148, and 96 EPG for the Blackbelly, Katahdin, and Pelibuey breeds, respectively, while in lactation, resistant ewes had less than 1587, 912, and 310 EPG, respectively. In the classification by HCT, Blackbelly ewes had values lower than 31.0%; therefore, only intermediate (HCT of 24.4%–31.0%) and susceptible ewes (HCT [Open Vet J 2025; 15(2.000): 871-884]http://www.ejmanager.com/fulltextpdf.php?mno=229468genetic selectionhaemonchus contortuspelibueyperipartumresistance |
| spellingShingle | María Guadalupe Pulido López Roberto Gonzalez Garduño Gerardo Jimenez Penago Glafiro Torres Hernandez Maritza Zaragoza Vera Josue Jonathan Ríos Hilario María Guadalupe Zambrano Velasco Classification of productive hair ewes using hematocrit as a marker of resistance to gastrointestinal nematodes Open Veterinary Journal genetic selection haemonchus contortus pelibuey peripartum resistance |
| title | Classification of productive hair ewes using hematocrit as a marker of resistance to gastrointestinal nematodes |
| title_full | Classification of productive hair ewes using hematocrit as a marker of resistance to gastrointestinal nematodes |
| title_fullStr | Classification of productive hair ewes using hematocrit as a marker of resistance to gastrointestinal nematodes |
| title_full_unstemmed | Classification of productive hair ewes using hematocrit as a marker of resistance to gastrointestinal nematodes |
| title_short | Classification of productive hair ewes using hematocrit as a marker of resistance to gastrointestinal nematodes |
| title_sort | classification of productive hair ewes using hematocrit as a marker of resistance to gastrointestinal nematodes |
| topic | genetic selection haemonchus contortus pelibuey peripartum resistance |
| url | http://www.ejmanager.com/fulltextpdf.php?mno=229468 |
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