Sheep gastrointestinal helminthiasis in the Sertão region of Paraíba State, Northeastern Brazil: prevalence and risk factors

Vieira, Vanessa Diniz; Vilela, Vinícius Longo Ribeiro; Feitosa, Thaís Ferreira; Athayde, Ana Célia Rodrigues; Azevêdo, Sérgio Santos de; Souto, Diego Vagner de Oliveira; Silveira, G. L.; Melo, Lídio Ricardo Bezerra de

doi:10.1590/s1984-29612014089

Cited by 12 publications

(13 citation statements)

References 17 publications

(17 reference statements)

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“…In all coprocultures, the most prevalent helminth genus was Haemonchus sp., corroborating with Vieira et al (2014), who identified (79.9%) of Haemonchus sp. in sheep in the semi-arid region of Paraíba State.…”

Section: Propertysupporting

confidence: 84%

“…It is plausible that this worm acquires faster resistance due to its high biotic potential, great genetic variability, and for having the allele that causes the increase of the resistance to a drug (BLACKHALL et al, 1998). Vieira et al (2014) observed that the most relevant risk factor for the development of helminthiasis in their study was the farm area, because it defines the area available for grazing animals. Properties with many animals and little pasture area, which are the most abundant type in the Sertão region of Paraiba, tend to have high prevalence of gastrointestinal helminthiasis, because the animals are more prone to reinfection.…”

Section: Propertymentioning

confidence: 97%

“…The main form of controlling parasitic diseases is the use of chemical compounds with a broad spectrum of action; the producers mostly administer anthelmintics empirically (CEZAR et al, 2010). Among the most used drugs for parasitic control are benzimidazoles (albendazole, fenbendazole, and oxfendazole), milbemycins (moxidectin), avermectins (ivermectin), imidazothiazoles (levamisole hydrochloride), and salicylanilides (closantel sodium) (BORGES, 2003;VIEIRA et al, 2014). In addition, the anthelmintic resistance by H. contortus was particularly alarming in many studies all over Brazil (SALGADO & SANTOS, 2016), including semi-arid region of the Paraíba State (RODRIGUES et al, 2007;LIMA et al, 2010;MELO et al, 2013;VILELA et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Nematode resistance to five anthelmintic classes in naturally infected sheep herds in Northeastern Brazil

Silva

Bezerra

Feitosa

et al. 2018

Rev. Bras. Parasitol. Vet.

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This study aimed to evaluate the occurrence of nematode resistance to anthelmintics on sheep herds from the semi-arid region of Paraíba, Northeastern Brazil. Fecal Egg Count Reduction Test (FECRT) was carried out on 20 properties. In each herd, 30 animals were divided into five groups containing six animals each: group I, treated with albendazole 10%, 4 mg/kg; group II, ivermectin 0.08%, 0.2 mg/kg; group III, closantel 10%, 10 mg/kg; group IV, levamisole hydrochloride 5%, 5 mg/kg; and group V, monepantel 2.5%, 2.5 mg/kg. All treatments were administered orally as a single dose. Fecal samples were collected on days zero and 10 after treatment, to perform FECRT and coprocultures. Multiresistance was observed in all the properties; 95% had high resistance to albendazole, 85% to ivermectin, 80% to closantel, 40% to levamisole, and 45% to monepantel. On property 15, where monepantel was ineffective, a second FECRT for this anthelmintic was carried out 4 months after the first, resulting in 75% efficacy. Immediately after the FECRT result, two ewes were euthanized and necropsied, and Haemonchus contortus, Trichostrongylus axei, Trichostrongylus colubriformis, Oesophagostomum columbianum, and Trichuris ovis were recovered. It was concluded that the resistance of sheep gastrointestinal nematodes to antthelmintic, including monepantel, is high.

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Section: Propertysupporting

confidence: 84%

Section: Propertymentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Nematode resistance to five anthelmintic classes in naturally infected sheep herds in Northeastern Brazil

Silva

Bezerra

Feitosa

et al. 2018

Rev. Bras. Parasitol. Vet.

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“…Tem ação hematófaga, causando grave anemia e levando o animal a morte (Vilela et al 2012, Vieira et al 2014a. Em ovinos, além de H. contortus, Trichostrongylus columbriformis, Strongyloides papillosus e Oesophagostomum columbianum também são considerados causadores de prejuízos nessa região (Vieira et al 2014b, Vilela et al 2016.…”

Section: Introductionunclassified

Controle de parasitas gastrintestinais em ovinos e análise financeira de uma fazenda com sistema de pastejo rotacionado irrigado no semiárido nordestino

et al. 2018

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RESUMO: O sistema de pastejo rotacionado irrigado é uma alternativa para a ovinocultura do semiárido. No entanto, a maior limitante para sua implementação são as dificuldades para controlar as parasitoses gastrintestinais. Neste trabalho objetivou-se determinar medidas de manejo para o controle das helmintoses gastrintestinais de ovinos em pastejo rotacionado irrigado e fazer a análise econômica do sistema. O experimento foi realizado em uma fazenda no Munícipio de Belém do São Francisco, Pernambuco, no período de abril de 2013 a setembro de 2014, em um rebanho de 646 a 859 ovinos mestiços da raça Dopper com Santa Inês, criados em uma área de 12 ha de pastagem de capim coast cross (Cynodon dactylon) dividida em 24 piquetes. Para o pastejo os ovinos foram divididos em dois grupos, um de ovelhas paridas e outro de ovelhas secas e borregas de mais de dois meses, que pastejavam três dias em cada piquete. Os piquetes tinham 36 dias de descanso. Foi feito teste de resistência aos anti-helmínticos no início de experimento e anualmente, que resultou na mudança anual do produto utilizado. No segundo ano, para as coletas de fezes e para o tratamento anti-helmíntico seletivo, as ovelhas paridas e as ovelhas secas foram divididas em dois subgrupos cada: paridas gordas, paridas magras, secas magras e secas gordas. Todos os meses coletavam-se fezes de 10% dos ovinos de cada subgrupo para fazer OPG e coprocultura. Cada grupo era tratado quando apresentavam média de mais de que 1000 OPG. Coletaram-se amostras de capim a cada dois meses para fazer a contagem e identificação de larvas do pasto. Durante os 18 meses de estudo foram tratados individualmente aproximadamente 3797 ovinos, equivalente a 6,49 tratamentos por ovino (3,97 em 2013 e 2,52 em 2014). O helminto mais prevalente nas coproculturas (50-85%) e no pasto (83,2%) foi Haemonchus contortus. Os menores números de larvas infectantes no pasto (94 a 111 larvas L3/ kg MS) ocorreram nos dias 35 e 2 a 8 de pastejo e os maiores números entre os dias 17 a 20 (374 a 761 L3/kg MS). A produção de carne da fazenda foi 1023 kg por hectare e a rentabilidade de 3,31%. Conclui-se que o pastoreio dos potreiros por três dias, com um descanso de 36 dias, com a utilização de tratamento seletivo, permite controlar as helmintoses gastrintestinais em sistemas de pastoreio rotacional irrigado. No entanto, é necessário realizar testes de resistência dos parasitas aos anti-helmínticos anualmente para contornar esse problema.

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“…Therefore, new alternatives for controlling helminths in small ruminants have been widely tested, such as using phytotherapy and FAMACHA (Vieira et al 2014).…”

Section: Discussionmentioning

confidence: 99%

The use of Eucalyptus staigeriana nanoemulsion for control of sheep haemonchosis

et al. 2017

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Sustainable control of gastrointestinal nematodes (GIN) in small ruminants has been based on the use of alternative methods, including targeted selective treatment, such as FAMACHA. Another GIN control alternative is the use of herbal medicines, although in many cases their use is based on empirical knowledge. Biopolymer nanoformulations has been investigated to maximize the essential oil effects against sheep gastrointestinal nematodes. The aim of the present study was to combine a Eucalyptus staigeriana essential oil nanoemulsion (EsNano) with FAMACHA as an alternative control for sheep haemonchosis. The study was performed over six months at a commercial sheep farm located in a semiarid region of Northeast Brazil. Initially, a fecal egg count reduction test (FECRT) in sheep with levamisole, ivermectin and oxfendazole in sheep was performed used to determine the most effective anthelmintic to use as the positive control. Levamisole has been selected because it showed efficacy superior to 95%. EsNano was obtained and then its physicochemical properties were characterized. The average (±SE) size of the particles in the nanoemulsion was 276.8 (±12.3) nm with bimodal distribution and polydispersity. Nine visits were performed, from April to September 2013, with an interval of 17 days. One hundred sixty-two male and female sheep were divided into three groups (n=54 each) and were treated when FAMACHA score was 3, 4, or 5: G-EsNano 250mg kg -1 EsNano; G-Lev 7.5mg kg -1 levamisole (positive control), and G-Neg was not treated (negative control). Feces from sheep were collected to quantify the number of eggs per gram of feces (epg) and to identify nematode genera. Sheep weight gain was monitored. The epg data for each group and the average sheep weight gains were analyzed by variance analysis and compared with the Tukey's test (P<0.05). Significant difference between the number of animals treated with EsNano and levamisole was not observed in any visit (P>0.05). The epg variation was similar in the G-EsNano and G-Lev groups on visits (P>0.05), except the second and fifth evaluation in the epg groups were significantly different (P<0.05). Haemonchus spp. was the most prevalent nematode. There was no significant weight gain in any of the treated groups (P<0.05). The combination of phytotherapy and FAMACHA can be an alternative to minimize the use of synthetic anthelmintics to control resistant GIN populations of small ruminants.

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Sheep gastrointestinal helminthiasis in the Sertão region of Paraíba State, Northeastern Brazil: prevalence and risk factors

Cited by 12 publications

References 17 publications

Nematode resistance to five anthelmintic classes in naturally infected sheep herds in Northeastern Brazil

Nematode resistance to five anthelmintic classes in naturally infected sheep herds in Northeastern Brazil

Controle de parasitas gastrintestinais em ovinos e análise financeira de uma fazenda com sistema de pastejo rotacionado irrigado no semiárido nordestino

The use of Eucalyptus staigeriana nanoemulsion for control of sheep haemonchosis

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