Distribution of adult and larval cyathostomes in helminth‐naive foals after primary infection

Reinemeyer, Craig R.; Herd, R.P.; Gabel, A. A.

doi:10.1111/j.2042-3306.1988.tb01528.x

Cited by 12 publications

(5 citation statements)

References 6 publications

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“…The minimum prepatent period was estimated to be between five and seven weeks (Round 1969, Reinemeyer and others 1988, Love and Duncan 1992). The establishment rate of 27 per cent observed in the present study is in agreement with the study of Reinemeyer and others (1988) who found establishment rates of 10.7 to 32.2 per cent, but higher than observed by Love and Duncan (1992), who found establishment rates of 8 to 19 per cent. However, some species, notably Triodontophorus species which were only detected as L4, and possibly the larger species of cyathostomes which were not present as adults, may have a longer prepatent period.…”

Section: Discussionsupporting

confidence: 93%

Persistence of the efficacy of a moxidectin gel on the establishment of cyathostominae in horses

et al. 1998

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A controlled trial was carried out to evaluate the persistence of the effect against small strongyles of a 2 per cent moxidectin gel administered orally to foals at a dose rate of 0.4 mg/kg bodyweight. Five of nine helminth-free foals were treated on day 0, and the remaining four foals were used as controls. On days 0, 7, 14, 21 and 28 all nine foals were infected experimentally with 200,000 small strongyle larvae. Three treated and two control foals were necropsied on day 42 and the rest on day 43. Fourteen species of small or medium sized small strongyles were found in the control foals, 10 of them in all four. The mean rate of establishment of the infection was 27 per cent in the control foals and 7 per cent in the treated foals. The numbers of mucosal inhibited early L3 and late L3 were about equal in each group, but there were more than 10 times as many mucosal L4 in the control foals. No lumenal stages were recovered from the treated foals, whereas almost 50 per cent of the total burdens of the control foals consisted of these stages. The establishment of the infection was prevented by moxidectin treatment for at least two and possibly three weeks.

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Section: Discussionsupporting

confidence: 93%

Persistence of the efficacy of a moxidectin gel on the establishment of cyathostominae in horses

et al. 1998

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“…Little is understood about the relative pathogenicity of individual species, or what determines the balance of species in any mixed population. Some species are known to predominantly reside in the colon, while others seem to prefer the caecum [ 19 ]. Little is also known about individual species' lifecycles in terms of patency period, although it has been reported that those species residing in the caecum appear later in the faeces than species residing in the colon [ 20 ].…”

Section: Species Prevalencementioning

confidence: 99%

Equine cyathostomins: a review of biology, clinical significance and therapy

Corning¹

2009

Parasites Vectors

136

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The small strongyles of horses, also known as cyathostomins, are considered the most prevalent and pathogenic parasites of horses today. The clinical syndrome of larval cyathostominosis which occurs as a result of mass emergence of inhibited stages has a high fatality rate despite the best standard of care given to affected horses. Management of the challenge level of cyathostomins to prevent the syndrome is preferable. Many different management programmes have been tried over the past two decades, with mixed success. Programmes have relied heavily on repeated use of anthelmintic treatments throughout the life of a horse.The widespread incidence of resistance to certain anthelmintics is reducing these options.An understanding of the biology of cyathostomins, risk factors for infection and appropriate strategic use of still effective anthelmintics is essential for the future management of this parasite group.This review highlights the necessity to use currently available anthelmintics that are appropriately suited to the biology of cyathostomins, and to maintain heir efficacy through an appropriate treatment strategy.

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“…There are, however, only two alternatives: maturation of hypobiotic larvae previously arrested in the gut wall, or recently ingested larvae that develop normally in the gut wall without a period of hypobiosis before emerging to become egg laying adults. Reports of a prepatent period as short as five to eight weeks (Russell 1948;Tiunov 1953;Round 1969;Reinemeyer, Herd and Gabel 1988) might suggest only a short sojourn in the gut wall, but larvae have been reported to persist in the tissues for as long as two and a half years (Gibson 1953;Smith 1976).…”

Section: Cross Resistance Between Bzd Drugs and Phenothiazinementioning

confidence: 99%

Distribution of adult and larval cyathostomes in helminth‐naive foals after primary infection

Cited by 12 publications

References 6 publications

Persistence of the efficacy of a moxidectin gel on the establishment of cyathostominae in horses

Persistence of the efficacy of a moxidectin gel on the establishment of cyathostominae in horses

Equine cyathostomins: a review of biology, clinical significance and therapy

Equine parasite control ‐ Problems associated with intensive anthelmintic therapy

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