Epidemiology and effect of gastrointestinal nematodes on beef cattle from tropical Argentina
The aim of this work was to study the epidemiology and the harmful effect of gastrointestinal nematodes (GINs) on beef cattle in the piedmont forest and grassland region of northwestern Argentina, between March 2015 and March 2016. Sixty weaned female calves were divided into three groups: STG—calve...
| Autores principales: | , , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Español |
| Publicado: |
2018
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/2039 https://link.springer.com/article/10.1007/s11250-017-1498-y https://doi.org/10.1007/s11250-017-1498-y |
| _version_ | 1855034894005043200 |
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| author | Suarez, Victor Humberto Martinez, Gabriela Marcela Micheloud, Juan Francisco Viñabal, Alberto |
| author_browse | Martinez, Gabriela Marcela Micheloud, Juan Francisco Suarez, Victor Humberto Viñabal, Alberto |
| author_facet | Suarez, Victor Humberto Martinez, Gabriela Marcela Micheloud, Juan Francisco Viñabal, Alberto |
| author_sort | Suarez, Victor Humberto |
| collection | INTA Digital |
| description | The aim of this work was to study the epidemiology and the harmful effect of gastrointestinal nematodes (GINs) on beef cattle in the piedmont forest and grassland region of northwestern Argentina, between March 2015 and March 2016. Sixty weaned female calves were divided into three groups: STG—calves treated systematically with 200 mcg/kg moxidectin every 40–50 days; LTG—calves treated as usually locally implemented, with 200 mcg/kg ivermectin on May 4 and August 5; and UTG—calves not receiving treatment. Moreover, a group of 20 untreated first-calving cows was monitored. Eggs per gram of faeces (epg) and faeces cultures were performed. Live weight gain (LWG) was recorded. Differences among groups were compared using analysis of variance and Tukey test. At the start of the experiment, mean epg was from moderate to high (595 ± 480); therefore, this group was treated in May. Mean UTG epg peaked (907 ± 754) in mid-winter, decreasing toward spring. LTG epg only decreased partially after treatment, showing 54.2% of ivermectin efficacy. Epg values of STG were always negligible values (95.8% of moxidectin efficacy). The dominant nematode genus was Cooperia (81.9%), followed by Haemonchus (15.5%). The effect of treatments was evident from middle autumn, with STG showing a significantly (p < 0.002) higher LWG than the other groups. Toward the end of the trial, LWG of STG and LTG increased by 27.2 and 8.2%, respectively, to those of UTG. This preliminary study showed a winter epg peak and a negative effect of GINs on LWG, even in moderately infected calves. |
| format | info:ar-repo/semantics/artículo |
| id | INTA2039 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Español |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| record_format | dspace |
| spelling | INTA20392018-07-05T12:13:29Z Epidemiology and effect of gastrointestinal nematodes on beef cattle from tropical Argentina Suarez, Victor Humberto Martinez, Gabriela Marcela Micheloud, Juan Francisco Viñabal, Alberto Epidemiologia Nematoda Ganado de Carne Beef Cattle Epidemiology Gastrointestinal Diseases Enfermedades Gastrointestinales The aim of this work was to study the epidemiology and the harmful effect of gastrointestinal nematodes (GINs) on beef cattle in the piedmont forest and grassland region of northwestern Argentina, between March 2015 and March 2016. Sixty weaned female calves were divided into three groups: STG—calves treated systematically with 200 mcg/kg moxidectin every 40–50 days; LTG—calves treated as usually locally implemented, with 200 mcg/kg ivermectin on May 4 and August 5; and UTG—calves not receiving treatment. Moreover, a group of 20 untreated first-calving cows was monitored. Eggs per gram of faeces (epg) and faeces cultures were performed. Live weight gain (LWG) was recorded. Differences among groups were compared using analysis of variance and Tukey test. At the start of the experiment, mean epg was from moderate to high (595 ± 480); therefore, this group was treated in May. Mean UTG epg peaked (907 ± 754) in mid-winter, decreasing toward spring. LTG epg only decreased partially after treatment, showing 54.2% of ivermectin efficacy. Epg values of STG were always negligible values (95.8% of moxidectin efficacy). The dominant nematode genus was Cooperia (81.9%), followed by Haemonchus (15.5%). The effect of treatments was evident from middle autumn, with STG showing a significantly (p < 0.002) higher LWG than the other groups. Toward the end of the trial, LWG of STG and LTG increased by 27.2 and 8.2%, respectively, to those of UTG. This preliminary study showed a winter epg peak and a negative effect of GINs on LWG, even in moderately infected calves. EEA Salta Fil: Suarez, Victor Humberto . Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Salta; Argentina Fil: Martinez, Gabriela Marcela. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Salta; Argentina Fil: Micheloud, Juan Francisco. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Salta; Argentina Fil: Viñabal, Alberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Salta; Argentina 2018-03-15T16:59:46Z 2018-03-15T16:59:46Z 2017-12 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion http://hdl.handle.net/20.500.12123/2039 https://link.springer.com/article/10.1007/s11250-017-1498-y 0049-4747 (Print) 1573-7438 (Online) https://doi.org/10.1007/s11250-017-1498-y spa info:eu-repo/semantics/restrictedAccess application/pdf Argentina (nation) Tropical animal health and production : 1–6. (December 2017) |
| spellingShingle | Epidemiologia Nematoda Ganado de Carne Beef Cattle Epidemiology Gastrointestinal Diseases Enfermedades Gastrointestinales Suarez, Victor Humberto Martinez, Gabriela Marcela Micheloud, Juan Francisco Viñabal, Alberto Epidemiology and effect of gastrointestinal nematodes on beef cattle from tropical Argentina |
| title | Epidemiology and effect of gastrointestinal nematodes on beef cattle from tropical Argentina |
| title_full | Epidemiology and effect of gastrointestinal nematodes on beef cattle from tropical Argentina |
| title_fullStr | Epidemiology and effect of gastrointestinal nematodes on beef cattle from tropical Argentina |
| title_full_unstemmed | Epidemiology and effect of gastrointestinal nematodes on beef cattle from tropical Argentina |
| title_short | Epidemiology and effect of gastrointestinal nematodes on beef cattle from tropical Argentina |
| title_sort | epidemiology and effect of gastrointestinal nematodes on beef cattle from tropical argentina |
| topic | Epidemiologia Nematoda Ganado de Carne Beef Cattle Epidemiology Gastrointestinal Diseases Enfermedades Gastrointestinales |
| url | http://hdl.handle.net/20.500.12123/2039 https://link.springer.com/article/10.1007/s11250-017-1498-y https://doi.org/10.1007/s11250-017-1498-y |
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