ANUALPEC () ‘Anuário da Pecuária Brasileira.’ 1st edn. (Instituto FNP and Agra Pesquisas Ltda: São Paulo, Brazil). ANUALPEC () ‘Anuário da. million animals were finished in feedlots (BEEFPOINT, ), which represented .. the past two decades (ANUALPEC, ). Concomitantly with the greater. accounting for about % of the national herd (ANUALPEC. ), this region shows the highest growth rate in the coun- try. Crossbreeding is.

Author: Yoktilar Voodoogami
Country: Senegal
Language: English (Spanish)
Genre: Medical
Published (Last): 12 February 2011
Pages: 101
PDF File Size: 3.88 Mb
ePub File Size: 13.98 Mb
ISBN: 565-8-18081-894-3
Downloads: 1221
Price: Free* [*Free Regsitration Required]
Uploader: Fenrizshura

Please review our privacy policy. Anthelmintic resistance to ivermectin and moxidectin in gastrointestinal nematodes of cattle in Europe. First, all calves available at each farm were included in the study; however, animals with anualpc than EPG before treatment were excluded prior to the formation of the experimental groups.

Statistical 20012 On each farm, pre-treatment and post-treatment EPG counts were used to calculate the efficacy of each treatment based on the reduction in EPG. However, this study was focused on situations in which two effective drugs were unavailable to farmers. The low efficacy of each single drug and the presence of multi-drug anualped gastrointestinal nematodes infecting cattle are major problems 2021 prevent adequate anthelmintic control at the farms evaluated in this study. Brazil is the world’s second largest producer of cattle, with a total herd of The results of this study showed the presence of gastrointestinal nematodes resistant to the main commercially available anthelmintic drugs on cattle farms evaluated in the state of Rio Grande do Sul, Brazil.

Therefore, previous knowledge regarding parasite resistance was used as a tool to snualpec the choice of potentially efficacious combinations of drugs. The detection of anthelmintic resistance in nematodes of veterinary importance.

Fenbendazole was the most effective compound in the studied herds, followed by levamisole, disophenol, and moxidectin. Acceptable efficacy was shown by some combinations: Frequent use of BZs at the studied farms may have resulted in the establishment of benzimidazole-resistant parasite populations.

Oil palm for biodiesel in Brazil—risks and opportunities – IOPscience

Drugs and Drug Resistance are provided here courtesy of Elsevier. This condition may have contributed to anualpsc good efficacy of levamisole at some farms. Abstract Gastrointestinal nematodes resistant to anthelmintics have been reported in several regions of Brazil, and they may be associated with economic losses for the cattle industry. Multiple resistance of gastrointestinal nematodes to nine different skid drugs in the sheep flock in southern Brazil.


The effect of analpec resistance on the productivity in feedlot cattle.

The authors of this manuscript have no financial or personal relationships with other people or organizations that could inappropriately influence or bias the content of the paper. All treatments anuxlpec administered by a veterinarian participant of the study following the manufacturer’s recommendations: The resistance of Cooperia spp.

Macrocyclic lactones MLsespecially avermectins, were not effective in any of the herds assessed in this study, with the exception of moxidectin at one farm. Ivermectin and moxidectin resistance characterization by larval migration inhibition test in field isolates of Cooperia spp; pp. Morphological identification of parasitic nematode infective larvae of small ruminants and cattle: Lateral resistance of macrolactones against cattle nematodes.

Anthelmintic treatment In the first part of the study, ten commercially available anthelmintic compounds were tested on each farm. On each farm, pre-treatment and post-treatment EPG counts were used to calculate the efficacy of each treatment based on the reduction in EPG.

Methods to determine resistance to anthelmintics when continuing larval development occurs. Closantel presents a narrow spectrum of action against gastrointestinal nematodes of ruminants. However, parasite resistance to multiple drugs was found in all herds, especially in the genera Cooperia spp. Monitoring the efficacy of ivermectin and albendazole against gastrointestinal nematodes of intestinal cattle in Northern Europe. Anthelmintic combination Genera Cooperia spp.

The black spheres indicate the locations of the farms. Support Center Support Center. Anthelmintic resistance in gastrointestinal nematodes from beef cattle in Campeche State, Mexico. Disophenol was effective against Haemonchus spp.

Additionally, the following technical criteria were considered: Each of the ten groups was randomly treated with a single drug in the first part of this study. However, the results of the present study indicate a worrying situation in relation to the control of gastrointestinal nematodes infections in cattle herds from Rio Grande do Sul because of the high level of multi-drug resistance of the parasite populations found in all farms studied.


At the four farms included in the second part of this study, six additional groups were treated with a combination of two anthelmintic compounds as described previously.

Ten farms located in Rio Grande do Sul state were selected by: These calves were distributed into 10 randomized blocks based on EPG at each farm, to balance the mean and the frequency distributions of EPG countings among the groups before the treatments. The broad detection of parasite resistance to several anthelmintics recognized as good quality commercial drugs suggests that parasite populations have developed resistance to the 22012 classes of anthelmintic drugs available in Brazil.

Closantel was effective against Haemonchus spp. However, closantel was effective against Haemonchus spp.

Oil palm for biodiesel in Brazil—risks and opportunities

After determining the qnualpec of each single anthelmintic treatment, six combinations of two drugs were tested at four of the ten farms as a second part of this study. This study aimed to verify the existence of populations of gastrointestinal nematodes resistant to several commercially available anthelminthic compounds by evaluating naturally infected beef cattle from herds located in the state of Rio Grande do Sul, Brazil.

National Center for Biotechnology InformationU. The total number of calves used per farm anualpe Alternatives for the control of gastrointestinal nematoides of small ruminants. These calves were distributed into 10 groups of 7—10 animals per farm and treated with ivermectin, doramectin, eprinomectin, fenbendazole, closantel, nitroxynil, disophenol, levamisole, albendazole, or moxidectin. Phenolic-substituted compounds disophenol and nitroxynil showed differing efficacy.

Author: admin