Ostertagia leptospicularis Asadov 1953 as a pathogen in British cattle

Saqur, I. Al; Armour, J.; Bairden, K.; Dunn, Alison M.; Jennings, FW

doi:10.1136/vr.107.22.511

Cited by 12 publications

(1 citation statement)

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“…Its infectivity and its pathogenicity have never been investigated in non-reservoir ruminants. However, with regards to O. leptospicularis, mixed infections of O. leptospicularis and O. ostertagi lead to more severe clinical signs than single infections in sheep and cattle [1]. It is unlikely that infection persists durably because of breeding management and anthelmintic treatments.…”

Section: Discussionmentioning

confidence: 99%

Spiculopteragia mathevossianiRuchliadev, 1948 is the minor morph ofSpiculopteragia spiculoptera(Gushanskaya, 1931): molecular evidence

2006

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-Although Spiculopteragia spiculoptera is primarily a parasite of cervids, it can also but less often contaminate domestic livestock. Little is known about its epidemiology and its pathogenicity in domestic ruminants and other unusual cervid species. Its taxonomic status remains unclear since the hypothesis of morphological polymorphism among males has been proposed. However, accurate taxonomy is fundamental in the identification and survey of potentially pathogenic species of parasites. The second internal transcribed spacer of rDNA (ITS-2) and the mitochondrial (mt) DNA-derived ND4 gene were used to study the polymorphism hypothesis for S. spiculoptera. ND4 evolves more quickly than ITS-2 and is considered to be more discriminant in the characterization of closely related species. DNA sequences of ITS-2 and ND4 were studied in 18 individual males of morphological type spiculoptera and in 3 of morphological type of mathevossiani from Red deer (Cervus elaphus), Roe deer (Capreolus capreolus) and Chamois (Rupicapra rupicapra). Intraindividual ITS-2 variations were detected within and between each morphotype of Spiculopteragia but these differences did not separate the two morphs mathevossiani and spiculoptera. Similarly, although ND4 showed a high level of nucleotide substitution, the morphotypes S. mathevossiani and S. spiculoptera were clustered together. Our genetic data support the dimorphic male hypothesis for the species S. spiculoptera. mitochondrial DNA / second internal transcribed spacer (ITS-2) / Spiculopteragia spiculoptera / Spiculopteragia mathevossiani / polymorphism

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Section: Discussionmentioning

confidence: 99%

Spiculopteragia mathevossianiRuchliadev, 1948 is the minor morph ofSpiculopteragia spiculoptera(Gushanskaya, 1931): molecular evidence

2006

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Experimental studies on the interaction between infections ofOstertagia leptospicularis and other bovineOstertagia species

et al. 1984

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Experimental infections of calves were carried out with either isolates of predominantly Ostertagia ostertagi, pure O. leptospicularis or a mixed isolate of equal numbers of both these species. The total worms established on day 21 for the mixed species from a total inoculum of 100 000 infective larvae, was 1.2 times greater than from 100 000 larvae of the O. ostertagi isolate and 3.3 times that of the pure O. leptospicularis isolate. The increased establishment in the mixed inoculum referred to both O. ostertagi and O. leptospicularis (days 17 and 21). These differences were both highly significant (P less than 0.01). The severity of the pathological changes was also greater in the mixed infections. It is suggested that these findings must be taken into account when control measures involving alternate grazing of sheep and cattle are being employed.

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The infectivity of some nematode parasites of reindeer (Rangifer tarandus L.) and elk (Alces alces L.) for cattle and sheep

Borgsteede

1982

Z. Parasitenkd.

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Cross infections were carried out by dosing parasite-free calves and lambs with third stage nematode larvae cultured from the faeces of reindeer and elk. Two lambs each received 20,000 larvae from reindeer, and one lamb 20,000 larvae from elk. One calf received 50,000 larvae from reindeer and one 50,000 from elk. The animals were killed 28 days after infection. Egg output did not differ significantly between the lambs nor between the calves, but in the lambs the output was much higher than in the calves (highest cound 4300 versus 275). Worm counts varied among the animals independent of the origin of the larvae. The highest take was found in the lamb infected with larvae from elk (81.5%) and the lowest in the calf infected with larvae from elk (15.1%). Ostertagia leptospicularis was the dominant species (80% or more) and the only other species present were Skrjabinagia kolchida and Spiculopteragia boehmi. The latter was found in a higher percentage (14.0 and 10.4) in the animals that received larvae cultured from elk faeces. Under natural conditions O. leptospicularis is possibly the only pathogenic species that can play a role in cross contamination to cattle and sheep.

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Ostertagia leptospicularis Asadov 1953 as a pathogen in British cattle

Cited by 12 publications

References 0 publications

Spiculopteragia mathevossianiRuchliadev, 1948 is the minor morph ofSpiculopteragia spiculoptera(Gushanskaya, 1931): molecular evidence

Spiculopteragia mathevossianiRuchliadev, 1948 is the minor morph ofSpiculopteragia spiculoptera(Gushanskaya, 1931): molecular evidence

Experimental studies on the interaction between infections ofOstertagia leptospicularis and other bovineOstertagia species

The infectivity of some nematode parasites of reindeer (Rangifer tarandus L.) and elk (Alces alces L.) for cattle and sheep

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