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Zaragoza-Vera CV, Gonzalez-Garduño R, Zaragoza-Vera M, Arjona-Jimenez G, Ortega-Pacheco A, Torres-Chable OM. EVALUATION OF PELIBUEY LAMBS BORN TO MOTHERS PHENOTYPICALLY SEGREGATED ACCORDING TO RESISTANCE TO GASTROINTESTINAL NEMATODES IN THE HUMID TROPICS OF MEXICO. J Parasitol 2023; 109:1-8. [PMID: 36633926 DOI: 10.1645/22-44] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The objective was to evaluate the effect of the resistance of ewes to gastrointestinal nematodes (GIN) on the parasitologic and productive performance of their lambs during preweaning and postweaning periods. Offspring from 44 Pelibuey ewes classified as resistant or susceptible to GIN were evaluated. During the preweaning period, birth weight (BW), live weight (LW) at 35 and 70 days of age, and live weight changes (LWC) were determined in 73 lambs. During the postweaning period, 20 lambs to susceptible or resistant ewes were evaluated. The lambs were challenged under natural GIN infections and artificial infection with L3 of Haemonchus contortus. The fecal egg count (FEC), hematocrit (HT), peripheral eosinophil count, plasma protein, LW, and LWC were determined. There were no differences among parameters evaluated during preweaning (P > 0.05). The type of lambing (single or multiple) affected the BW, LW, and LWC (P < 0.01). The sex (male) of the lamb had a positive effect on BW at 35 and 70 days of age (P < 0.05). After weaning, lambs of susceptible ewes showed higher FEC than resistant ewes (P < 0.05). The HT of lambs to resistant ewes was higher than those the susceptible group (P < 0.01). In conclusion, offspring of resistant ewes show low FEC compared with those susceptible during the postweaning stage.
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Affiliation(s)
- Claudia Virginia Zaragoza-Vera
- Laboratorio de Enfermedades Tropicales y Transmitidas por Vectores, Division Academica de Ciencias Agropecuarias, Universidad Juarez Autonoma de Tabasco, km. 25, Carretera Villahermosa-Teapa, R/a La Huasteca 2ª. Seccion, C.P. 86298 Villahermosa, Tabasco, Mexico
| | - Roberto Gonzalez-Garduño
- Unidad Regional Universitaria Sursureste, Universidad Autonoma Chapingo, km 7.5 Carretera Teapa-Vicente Guerrero, C.P. 86800 Teapa, Tabasco, Mexico
| | - Maritza Zaragoza-Vera
- Laboratorio de Enfermedades Tropicales y Transmitidas por Vectores, Division Academica de Ciencias Agropecuarias, Universidad Juarez Autonoma de Tabasco, km. 25, Carretera Villahermosa-Teapa, R/a La Huasteca 2ª. Seccion, C.P. 86298 Villahermosa, Tabasco, Mexico
| | - Guadalupe Arjona-Jimenez
- Laboratorio de Enfermedades Tropicales y Transmitidas por Vectores, Division Academica de Ciencias Agropecuarias, Universidad Juarez Autonoma de Tabasco, km. 25, Carretera Villahermosa-Teapa, R/a La Huasteca 2ª. Seccion, C.P. 86298 Villahermosa, Tabasco, Mexico
| | - Antonio Ortega-Pacheco
- Facultad de Medicina Veterinaria y Zootecnia, Campus de Ciencias Biologicas y Agropecuarias, Universidad Autonoma de Yucatán, Km. 15.5, Carretera Merida-Xmatkuil, Apdo. postal 4-116, 97100 Merida, Yucatan, Mexico
| | - Oswaldo Margarito Torres-Chable
- Laboratorio de Enfermedades Tropicales y Transmitidas por Vectores, Division Academica de Ciencias Agropecuarias, Universidad Juarez Autonoma de Tabasco, km. 25, Carretera Villahermosa-Teapa, R/a La Huasteca 2ª. Seccion, C.P. 86298 Villahermosa, Tabasco, Mexico
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Palevich N, Maclean PH, Baten A, Scott RW, Leathwick DM. The Genome Sequence of the Anthelmintic-Susceptible New Zealand Haemonchus contortus. Genome Biol Evol 2019; 11:1965-1970. [PMID: 31263885 PMCID: PMC6644846 DOI: 10.1093/gbe/evz141] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/30/2019] [Indexed: 12/14/2022] Open
Abstract
Internal parasitic nematodes are a global animal health issue causing drastic losses in livestock. Here, we report a H. contortus representative draft genome to serve as a genetic resource to the scientific community and support future experimental research of molecular mechanisms in related parasites. A de novo hybrid assembly was generated from PCR-free whole genome sequence data, resulting in a chromosome-level assembly that is 465 Mb in size encoding 22,341 genes. The genome sequence presented here is consistent with the genome architecture of the existing Haemonchus species and is a valuable resource for future studies regarding population genetic structures of parasitic nematodes. Additionally, comparative pan-genomics with other species of economically important parasitic nematodes have revealed highly open genomes and strong collinearities within the phylum Nematoda.
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Affiliation(s)
- Nikola Palevich
- AgResearch Limited, Grasslands Research Centre, Palmerston North, New Zealand
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