Parasitic gastro-enteritis of cattle: The distribution and survival of infective strongyle on pasture

Abstract

Observations are reported on the behaviour and longevity of infective cattle strongyle larvae in faecal pats and on pasture in south-eastern Queensland. Environmental conditions within the pat were favourable for the development of infective larvae at all seasons of the year except midsummer and midwinter. Larvae were distributed for the most part either in the pat or on pasture vegetation. Larvae migrated laterally from the pat for distances up to at least 3 ft, but usually not more than 1 ft, and these movements occurred only after suitable rain. At no time was a single mass movement of all larvae in the pat observed. If rainfall was continuous, migration was continuous, and when rainfall was alternated with periods of dryness, migration occurred in waves. Pats exposed in the summer remained a source of larvae for 5 months. This period was extended to 7–8 months with pats exposed in the winter. Larvae survived on pasture for up to 6 and 8 weeks respectively for these seasons of the year. Vertical migration on pasture was also observed.

Efficacy of an energy block containing Duddingtonia flagrans in the control of gastrointestinal nematodes of sheep

“…These authors point out that despite the scarce water content in sheep faeces, nematophagous fungi survive and develop well in that medium, which would indicate that these fungi are more versatile than previously believed. Furthermore, the low humidity content of fresh faeces is also enough for parasite larvae to develop to their infective stage (Durie 1961). In addition, it is possible to argue that the small grazing area might have collaborated to achieve the high fungal efficacy observed in the present study since the animals in both groups were forced to ingest all grass available very close to the faecal depositions, where L3 were present in the case of the control group while much lower numbers of L3 were available for the animals in the treated group.…”

Occurrence of Strongyloides papillosus associated with extensive pulmonary lesions and sudden deaths in calves on a beef farm in a highland area of South Bohemia (Czech Republic)

“…High prevalence of S. papillosus and sudden death of beef calves is associated with rearing of animals in small pens with sawdust litter (Taira & Ura, 1991;Chompoochan et al, 1998). The positive effect of warm and humid climate on survival of pre-parasitic stages was reported (Durie, 1961;Panday et al, 1994). The risk of sudden death of calves caused by hyperinfection of S. papillosus in animals during first month of their lives in cowshed with sawdust litter on beef farms under extensive system in a mountain area of the temperate zone was supported by results of this study and at the same time the influence of other pathogens on sudden deaths were excluded by parasitological and bacteriological examinations.…”

Pattern of Occurrence of Gastrointestinal Strongylosis in an Organized Caprine Farm of Wayanad district, Kerala, South India

“…The warm and humid climate favours the development and survival of preparasitic stages (Durie, 1961). Infection with helminths not only lowers the animal's immunity but it renders susceptible to other pathogenic infections (Garedaghi et al, 2011).…”