Revisão do genero Haemonchus Cobb, 1898: (Nematoda: Trichostrongylidae)

Almeida, J. Lins de

doi:10.1590/s0074-02761935000700002

Cited by 14 publications

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“…In addition, it is possible to confuse H. contortus with Ashworthius patriciapilittae Hoberg, Abrams, Carreno and Lichtenfels, 2002, a haemonchine described based on material in O. virginianus from Costa Rica . Finally, we continue to have scant information on the abomasal parasite fauna of endemic cervids in South America (Almeida, 1933(Almeida, , 1935Diaz et al, 1977;Vicente et al, 1997).…”

Section: Parasite-host Coevolution and Historical Biogeographymentioning

confidence: 99%

“…Another 7 species, H. bedfordi Le Roux, 1929, H. dinniki Sachs, Gibbons and Lweno, 1973, H. horaki Lichtenfels, Pilitt, Gibbons and Boomker, 2001, H. krugeri Ortlepp, 1964, H. lawrencei Sandground, 1933, H. mitchelli Le Roux, 1929, and H. vegliai Le Roux, 1929, are primary parasites among respective host groups and species of wild Bovinae, Cephalophinae, Reduncinae, Aepycerotinae, Antilopinae, Alcelaphinae, and Caprinae in sub-Saharan Africa, whereas H. okapiae van den Berghe, 1937 occurs in Giraffidae, and H. longistipes Railliet and Henry, 1909 occurs in Camelidae and domestic sheep, goats, and rarely, cattle across a broader range extending from Africa to southern Eurasia (Gibbons, 1979;Jacquiet et al, 1995;Lichtenfels et al, 2001Lichtenfels et al, , 2002. Although as a group these nematodes have been the focus of considerable taxonomic study, there has been no previous attempt to elucidate phylogenetic relationships among the recognized species of Haemonchus (e.g., Almeida, 1935;Gibbons, 1979).…”

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confidence: 99%

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Phylogeny for Species of Haemonchus (Nematoda: Trichostrongyloidea): Considerations of Their Evolutionary History and Global Biogeography Among Camelidae and Pecora (Artiodactyla)

Hoberg¹,

Lichtenfels²,

Gibbons³

2004

Journal of Parasitology

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Section: Parasite-host Coevolution and Historical Biogeographymentioning

confidence: 99%

mentioning

confidence: 99%

Phylogeny for Species of Haemonchus (Nematoda: Trichostrongyloidea): Considerations of Their Evolutionary History and Global Biogeography Among Camelidae and Pecora (Artiodactyla)

Hoberg¹,

Lichtenfels²,

Gibbons³

2004

Journal of Parasitology

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“…Sandground (1933) described H. lawrencei. Almeida (1933) argued that only male characters can be relied upon for specific identification and synonymized H. atectus, H. pseudocontortus and H. fuhrmanni with H. contortus and considered H. cervinus and H. bispinosus as species inquirendae until further investigation. He also pointed out that H. lunatus may be an anomalous form of H. contortus.…”

Section: Introductionmentioning

confidence: 99%

Revision of the genus Haemonchus Cobb, 1898 (Nematoda: Trichostrongylidae)

Gibbons

1979

Syst Parasitol

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“…was published by Almeida (1935). On the basis of the male copulatory structures (bursa and spicules), the author classified 10 Haemonchus species as valid ( Table 2).…”

Section: Species Of Haemonchusmentioning

confidence: 99%

“…In most such studies, the distinctions between H. contortus and H. placei were not considered. Some authors followed the criteria, established by Almeida (1935) and by Gibbons (1979), that do not accept H. placei as a valid species, whereas others simply referred to specimens found in small ruminants as H. contortus and those found in cattle as H. placei. It is known that both species can simultaneously infect cattle and small ruminants specially when there are shared pastures (AMARANTE et al, 1997;ACHI et al, 2003;JACQUIET et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Why is it important to correctly identify Haemonchus species?

Amarante

2011

Rev. Bras. Parasitol. Vet.

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Parasitic gastroenteritis caused by Haemonchus spp. is a major cause of economic losses in the livestock industry because it impairs weight gain and increases mortality in cattle and small ruminants, especially in tropical and subtropical areas. The proper identification of the various species, as well as knowledge regarding the epidemiology of parasitic gastroenteritis, is essential for the establishment of sustainable strategies of parasite control. This review focuses on the use of easily applied, low-cost parasitological methods of identifying Haemonchus species on the basis of their morphology. In most studies carried out in Brazil, the distinctions between Haemonchus contortus and Haemonchus placei have not been considered. Many reports of H. contortus, particularly in cattle, might actually represent H. placei. The appropriate identification of species is therefore indispensable. In addition to the measurement of male spicules, new morphological characteristics, such as the synlophe, should be evaluated in order to differentiate between and among species. Measurements of infective larvae in fecal cultures can also indicate the identity of Haemonchus species. This approach can be quite useful in studies that do not involve animal sacrifice, such as studies of anthelmintic resistance based on the fecal egg count reduction test.Keywords: Haemonchus placei, Haemonchus contortus, Haemonchus similis, ruminants, morphology. ResumoInfecções por Haemonchus spp. são uma das principais causas de perda econômica nas criações de ruminantes devido à redução no ganho de peso e mortalidade de bovinos e pequenos ruminantes, especialmente em regiões com clima tropical e subtropical. A identificação precisa das diferentes espécies, bem como o conhecimento sobre a epidemiologia das gastroenterites parasitárias, são fundamentais para a elaboração de estratégias sustentáveis de profilaxia das parasitoses. Essa revisão tem por objetivo central, abordar os principais métodos parasitológicos utilizados na identificação morfológica das espécies, os quais se caracterizam pela facilidade e baixo custo. Na maioria dos estudos realizados no Brasil, a distinção entre as espécies Haemonchus contortus e Haemonchus placei não tem sido considerada. Vários relatos de H. contortus, particularmente em bovinos, podem se tratar na verdade da infecção dos animais por H. placei. A identificação correta das espécies é, portanto, fundamental. Além das medidas dos espículos dos exemplares machos, outros detalhes morfológicos, tais como a sínlofe, devem ser avaliados com o objetivo de auxiliar na diferenciação das espécies. Mensurações das larvas infectantes, obtidas em coproculturas, podem também indicar a espécie de Haemonchus presente. Esse procedimento pode ser útil especialmente em estudos que não envolvem a necropsia de animais, como é o caso de testes destinados a avaliar a resistência anti-helmíntica em rebanhos.

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Revisão do genero Haemonchus Cobb, 1898: (Nematoda: Trichostrongylidae)

Cited by 14 publications

References 0 publications

Phylogeny for Species of Haemonchus (Nematoda: Trichostrongyloidea): Considerations of Their Evolutionary History and Global Biogeography Among Camelidae and Pecora (Artiodactyla)

Phylogeny for Species of Haemonchus (Nematoda: Trichostrongyloidea): Considerations of Their Evolutionary History and Global Biogeography Among Camelidae and Pecora (Artiodactyla)

Revision of the genus Haemonchus Cobb, 1898 (Nematoda: Trichostrongylidae)

Why is it important to correctly identify Haemonchus species?

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