| Autor: |
Víctor SUAREZ, Virginia ARAOZ, Juan F. MICHELOUD, Alberto VIÑABAL |
| Jazyk: |
Spanish; Castilian |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
FAVE Sección Ciencias Veterinarias, Vol 17, Iss 1, Pp 18-24 (2018) |
| Druh dokumentu: |
article |
| ISSN: |
2362-5589 |
| DOI: |
10.14409/favecv.v17i1.7222 |
| Popis: |
The aim of this study was to determine the epidemiology and the effects of gastrointestinal nematodes (GIN) on beef cattle heifers in the Chaco Semiarid region of Salta, Northwestern Argentina. In March 2016 sixty heifer calves were divided in three groups of twenty each: MXDG, calves treated with moxidectin (200 μg/kg) every 45 days, IVMG: calves treated once at the beginning of the trial with ivermectin LA (630 μg/kg) and CONG: untreated control calves. Faecal egg counts (FEC) and faecal cultures were performed every 45 days. Live weight gain (LWG) was recorded at each sampling time. The average FEC at the beginning of the trial was low ( =102±77) for all groups. For the CONG the FEC peaked towards mid-winter ( =1049±1040), and mid-spring ( =667±928) and to decrease toward the end of the trial. FEC for IVMG only decreases partially (37.3%) post-treatment, while for MXDG showed always negligible values. The predominant genera were Haemonchus (47.1%) and Cooperia (45.9%). The moxidectin treatment effect was evident from late autumn onwards, the MXDG showed significant (p |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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