Contagens de ovos por grama de fezes para o controle anti-helmíntico em bovinos de leite de diferentes faixas etárias

Antonello, Ana Maria; Cezar, Alfredo Skrebsky; Sangioni, Luís Antônio; Vogel, Fernanda Silveira Flôres

doi:10.1590/s0103-84782010005000067

Cited by 7 publications

(5 citation statements)

References 6 publications

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“…Para evitar esto se debe de priorizar a los becerros de ambos sexos hasta los 24 meses de edad y a las hembras en el periparto. Ambas categorías están mucho más susceptibles a los helmintos (38,39,40) . Solo en el 33.3 % de las granjas trataron a las vacas en periparto.…”

Section: Control De La Helmintiasisunclassified

“…Las vacas Cebú con múltiples partos no requieren de la desparasitación, y han mostrado tener una resistencia natural a los NG y una baja potencial de contaminación cuando se maneja apropiadamente (5,41) . Se deben promover cambios en las estrategias de control de los NG (38) , para que incluya categorías de edad, que sigue los criterios climáticos y regionales, y que consideren el perfil de las poblaciones resistentes de los NG (37) .…”

Section: Control De La Helmintiasisunclassified

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Helminthiasis control in calves raised in a hot Semi-arid area

Pereira¹,

Duarte²,

Bastos³

et al. 2019

Rev. Mex. Cienc. Pecu.

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This study aimed to characterize the helminthiasis and anthelminthic effectiveness in calf herds raised in a hot semi-arid area. Sixty (60) cattle farms from the northern area of Minas Gerais, Brazilian sertão, were categorized by semi-structured questionnaires. It was also performed the fecal egg counts (FEC) reduction test to analyze the profile of anthelminthic resistance in eight herds. The study selected groups of at least 10 homogeneous calves with FEC ≥ 150 per treatment. After 12 h of fast, calf groups were treated with albendazole, levamisole, ivermectin, doramectin or abamectin, except the control groups (untreated). It was collected feces before treatments and 14 d later larvae genera of nematodes were identified after coproculture. Extensive grazing was the predominant creation system for beef calves, worming was employed every 6 mo in 64 % of the farms and macrocyclic lactones was the most frequently used anthelminthic group. The anthelminthic efficacy varied from 62 to 98.9 %. The resistance profile to ivermectin, levaminosole, albendazole and (or) doramectin verified in this research is alarming as the genus Haemonchus was the most frequent one before and after the treatments. It was detected variations in the creation systems, in control practices and in anthelminthic susceptibility profiles between herds. Therefore, this work emphasize the importance of using strategic control with FEC reduction test for choice of anthelminthic and the encouragement of practices of alternative control.

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Section: Control De La Helmintiasisunclassified

Helminthiasis control in calves raised in a hot Semi-arid area

Pereira¹,

Duarte²,

Bastos³

et al. 2019

Rev. Mex. Cienc. Pecu.

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“…Gastrointestinal nematode infections in dairy herds compromise the health and welfare of animals, leading to productive and economic losses (Geurden et al , 2015; Ravinet et al , 2016). Parasitism can negatively affect growing rate and puberty in heifers (Lacau-Mengido et al , 2000), in addition to promoting losses in milk production (Antonello et al , 2010). From an epidemiological point of view, only 5% of gastrointestinal nematodes are on the animals, while the remainder are on the pasture in the form of immature stages (Sagüés et al , 2011).…”

Section: Introductionmentioning

confidence: 99%

Predatory activity of nematophagus fungus Duddingtonia flagrans in infective larvae after gastrointestinal transit: biological control in pasture areas and in vitro

et al. 2021

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Biological control is a strategy to decrease parasitic populations, and the action takes place through natural antagonists in the environment. We studied the predatory activity of the fungus Duddingtonia flagrans in infective larvae (L3) of gastrointestinal nematodes after gastrointestinal transit. Ten heifers were divided into two groups: treated (animals received pellets containing fungus) and control (animals received pellets without fungus). Twelve hours after administration, faeces samples were collected for in vitro efficacy tests. The animals then remained for 7 h in the experimental pasture area. At the end of this period, 20 faecal pads (ten treated and ten control) were selected at random. Pasture, faecal pad and soil collections occurred with an interval of 7 days, totalling four assessments. In vitro activity demonstrated that fungi effectively preyed on L3, achieving a reduction percentage of 88%. In the faecal pad of the pasture area, there was a difference (P < 0.05) between collections 3 and 4 for both groups; in the treated group a reduction of 65% was obtained, while in the control group there was an increase of 217% in the number of L3. The recovery of L3 in the soil and in the pasture was similar in both groups. There was no influence (P = 0.87) of the passage time on the fungus predatory activity. Duddingtonia flagrans demonstrated the ability to survive gastrointestinal transit in the animals, reducing the number of L3 in the faeces, indicating that this biological control has great potential in the control of worm infections.

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“…Generally, these products are administered based on a single criterion, namely the physical condition of the animal. It is therefore characterized as a conventional treatment, since it is adopted by the majority of dairy farms (ANTONELLO et al, 2010;KENYON & JACKSON, 2012). However, to delay the emergence of resistance and reduce costs with treatments, the selective treatment appears as an alternative.…”

Section: Introductionmentioning

confidence: 99%

Economic evaluation and efficacy of strategic-selective treatment of gastrointestinal parasites in dairy calves

Blanco

Barbieri

Lima

et al. 2017

Rev. Bras. Parasitol. Vet.

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In the Experimental Farm of the Universidade Federal de Lavras (EF-UFLA), state of Minas Gerais, Brazil, on their day of birth, female Holstein calves were randomly selected and placed into two groups containing fifteen animals each: Strategic-Selective Treatment (S-ST) or Conventional Treatment (CT). In the S-ST, calves were treated after coproparasitological examinations according to criteria established previously by the researchers. Calves in the CT were treated according to the opinion of the veterinarian of EF-UFLA. For statistical analysis, the frequency (%) of fecal samples with count of eggs per gram of feces (EPG) ≥300, count of oocysts per gram of feces (OoPG) ≥500 and fecal samples with count of cysts of Giardia spp. ≥1 were conducted. The overall average frequency of fecal samples with EPG ≥300, OoPG ≥500 and Giardia spp. cysts ≥1, respectively, was similar (p >0.05) between S-ST (20.3%; 17.3%; and 31.5%) and CT (26.4%; 23.9%; and 37.3%). The effective operational cost, per animal, in 12 months, was of R$ 784.58 (US$ 241.41) and R$ 83.90 (US$ 25.81) in S-ST and CT, respectively. The S-ST requires adjustments to be used as a technically efficient and economically viable alternative for the control of gastrointestinal parasitosis in female Holstein calves.Keywords: Bovine, gastrointestinal nematodes, Eimeria, Giardia, costs. ResumoNa Fazenda Experimental da Universidade Federal de Lavras (FE-UFLA), Minas Gerais, Brasil, no dia do nascimento, bezerras da raça holandesa foram sorteadas de forma aleatória para compor um dos dois grupos, formados por 15 animais cada: Tratamento Estratégico-Seletivo (TE-S) ou Tratamento Convencional (TC). No TE-S, as bezerras foram tratadas após exames coproparasitológicos de acordo com critérios previamente estabelecidos pelos pesquisadores. No TC, as bezerras foram tratadas conforme orientação do veterinário da FE-UFLA. Em ambos grupos, as bezerras foram monitoradas a cada 14 dias, do nascimento até os 12 meses de idade, por meio de exames coproparasitológicos. Para análise estatística, considerou-se a frequência (%) de amostras fecais com contagem de ovos por grama de fezes (OPG) ≥300, contagem de oocistos por grama de fezes (OoPG) ≥500, e amostras fecais com contagem de cistos de Giardia spp. ≥1. A frequência média global de amostras fecais com contagem de OPG ≥300, OoPG ≥500 e cistos de Giardia spp. ≥1, respectivamente, foi similar (p >0,05) entre TE-S (20,3%; 17,3%; e 31,5%) e TC (26,4%; 23,9%; e 37,3%). O custo operacional efetivo, por animal, em 12 meses, foi R$ 784,58 (US$ 241.40) e R$ 83,90 (US$ 25.81) para TE-S e TC, respectivamente. O TE-S necessita de ajustes para que possa ser indicado como uma alternativa, tecnicamente eficiente e economicamente viável, no controle das parasitoses gastrointestinais em bezerras leiteiras.

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Contagens de ovos por grama de fezes para o controle anti-helmíntico em bovinos de leite de diferentes faixas etárias

Cited by 7 publications

References 6 publications

Helminthiasis control in calves raised in a hot Semi-arid area

Helminthiasis control in calves raised in a hot Semi-arid area

Predatory activity of nematophagus fungus Duddingtonia flagrans in infective larvae after gastrointestinal transit: biological control in pasture areas and in vitro

Economic evaluation and efficacy of strategic-selective treatment of gastrointestinal parasites in dairy calves

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