The seasonal variations in the nematode egg counts of sheep: a comparison of the spring rise phenomenon in breeding and unmated ewes

Brunsdon, R.V.

doi:10.1080/00480169.1964.33556

Cited by 51 publications

(17 citation statements)

References 7 publications

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“…'on pasfure 148 NEW ZEALAND VETERINARY JOURNAL Vol. 14 in the present study; as in the previous study (Brunsdon, 1964), differs from the findings of Crofton (19S4). He found that the.…”

Section: D~ussloncontrasting

confidence: 85%

“…in the animals on pasture. Previous studies carried out on the same area (Barker, unpublished; Brunsdon, 1963Brunsdon, , 1966 have shown that laryae of Ostertagia spp. overwinter on pasture.…”

Section: D~usslonmentioning

confidence: 93%

“…Stu~ies on this phenomenon have been summanzed by several workers (Crofton, 1954(Crofton, , 1958(Crofton, , 1963Field et al, 1960;Soulsb) Spedding, 1962). The occurrence of a spring-rise in breeding ewes in New Zealand was recorded by Brunsdon (1964) who has also demonstrated the importance of the contamination deposited by the ewe at the time of the spring-rise, in affecting the speed and degree of build-up of trichostrongyle infestation in lambs (Brunsdon, 1966).…”

Section: Please Scroll Down For Articlementioning

confidence: 96%

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A comparison of the spring-rise phenomenon in the faecal nematode-egg counts of housed sheep with that of sheep grazing infective pasture

Brunsdon¹

1966

New Zealand Veterinary Journal

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“…'on pasfure 148 NEW ZEALAND VETERINARY JOURNAL Vol. 14 in the present study; as in the previous study (Brunsdon, 1964), differs from the findings of Crofton (19S4). He found that the.…”

Section: D~ussloncontrasting

confidence: 85%

Section: D~usslonmentioning

confidence: 93%

Section: Please Scroll Down For Articlementioning

confidence: 96%

See 1 more Smart Citation

A comparison of the spring-rise phenomenon in the faecal nematode-egg counts of housed sheep with that of sheep grazing infective pasture

Brunsdon¹

1966

New Zealand Veterinary Journal

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“…Usually, the greatest importance is attached to the parturi- tion and lactation (Blitz and Gibbs 1971;Etter et al 1999;Nǵangǵa et al 2006). However, some authors describe the relevant seasonal factors (Field et al 1960;Brunsdon 1964;Gibbs and Barger 1986). Gibbs and Barger (1986) supposed that the trigger for stimulation of the rise may not have been related to the changes associated with parturition and lactation but it could have been a seasonal stimulus derived from within larvae.…”

Section: Methodsmentioning

confidence: 99%

Arrested development of sheep strongyles: onset and resumption under field conditions of Central Europe

et al. 2008

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Two tracer tests were conducted between August 2004 and March 2007 at an ecological farm in western Bohemia. The first tracer test was performed for the summer-autumn grazing period (onset of arrested development), the second for spring (resumption of arrested development). In the first tracer test, the percentage of nematodes arresting development over the winter months reached 87.7% for Teladorsagia circumcincta, 66.7% for Haemonchus contortus, 89.9% for Nematodirus filicollis, 21.6% for Trichostrongylus axei, and 23.9% for both Trichostrongylus vitrinus and Trichostrongylus colubriformis. None of the arrested larvae were observed with species Cooperia curticei, Nematodirus battus, and Oesophagostomum venulosum. In the second tracer test, a significant increase of adult worms was discovered in March of species T. circumcincta and N. filicollis and Trichostrongylus spp. in February. Redundancy analysis and generalized linear models analyses have confirmed that environmental conditions play a crucial role in hypobiosis of sheep strongyles in the Czech Republic. The analysis of influences of various environmental factors revealed that the number of arrested larvae was negatively influenced by light-day length, sunshine, or daylight decrease (p < 0.01).

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“…The resumed development of the hypobiotic larvae often results in the events known as "spring rise" and "periparturient rise." A sudden pronounced surge in nematode egg counts is the characteristic features of these events as a result of the arrested larvae massively reach the reproductive adult stage [50].Spring rise occurs during the spring and although it is commonly associated with parturition, it is also seen in non-reproducing hosts [51]. On the other hand, periparturient rise harmonize with parturition during the spring lambing/kidding season but may also occur at other times of the year.…”

Section: Hypobiosis:-mentioning

confidence: 99%

Haemonchus Contortus and Ovine Host: A Retrospective Review.

Ashram¹,

Nasr²,

Mehmood³

et al. 2017

IJAR

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Gastrointestinal (GI) parasitic infections are a world-wide problem for both small-and large-scale farmers. Infection by GI parasites in ruminants, including sheep and goat can result in harsh economic losses in a variety of ways: reproductive inefficiency, decreased work capacity, involuntary culling, diminished food intake, poor animal growth rates and lower weight gains, treatment and management costs, and mortality in heavily parasitized animals. Among the GI parasites that cause losses to the farming industry, the barber"s pole worm Haemonchus contortus is the predominant, blood-sucking, highly pathogenic, and economically important nematode that infects small ruminants. Here, we review the historical and recent literature on the ovine-parasite-environment interaction for H. contortus to bring avenues where advances in the understanding of these interactions is an indispensible to develop a cost effective control strategies as potential options for the haemonchosis control in sheep and the proper management of sheep in various production systems.

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The seasonal variations in the nematode egg counts of sheep: a comparison of the spring rise phenomenon in breeding and unmated ewes

Cited by 51 publications

References 7 publications

A comparison of the spring-rise phenomenon in the faecal nematode-egg counts of housed sheep with that of sheep grazing infective pasture

A comparison of the spring-rise phenomenon in the faecal nematode-egg counts of housed sheep with that of sheep grazing infective pasture

Arrested development of sheep strongyles: onset and resumption under field conditions of Central Europe

Haemonchus Contortus and Ovine Host: A Retrospective Review.

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