Development and survival of Ascaris suum eggs in deep litter of pigs
Type de document
journalArticle
Langue source
Anglais
Titre français
Titre anglais
Development and survival of Ascaris suum eggs in deep litter of pigs
Auteur(s)
- KATAKAM Kiran Kumar
- THAMSBORG Stig Milan
- KYVSGAARD Niels Christian
- DALSGAARD Anders
- MEJER Helena
Editeur(s)
Autre(s)
Id
EUCX9S9A
Version
2274
Date ajout
24 décembre 2020 13:40
Date modification
24 décembre 2020 13:40
Résumé anglais
Indoor transmission of Ascaris suum partly depends on the physico-chemical conditions in bedding material. Temperature, pH, aqueous ammonia, moisture, occurrence and development of A. suum eggs were therefore compared in different areas (resting, intermediate and latrine) of two deep litter pens on an organic farm in four seasons. There was some variation, but mean ammonia levels were generally very low (1·0–2·6 mm) and pH levels were moderate (8·04–8·88) in all three areas. Relatively, resting areas were characterized by overall moderate moisture (36%) and moderately high temperature (35·7 °C) levels. The area contained few eggs (50 eggs g−1 DM) of which 17% were viable, and though only 4% were larvated and 0·7% appeared infective, it was more than in the other areas. Intermediate areas had moderate moisture (43%) and high temperature (43·6 °C) levels. There were many eggs (523 eggs g−1 DM), but overall viability was very low (5%) and few eggs were larvated (0·004%) or even infective (0·002%). Latrines typically had high moisture (79%) and moderate temperature (30 °C) levels. The concentration of eggs was very high (1444 egg g−1 DM) and though 32% were viable, none had developed larval stages. The large majority of A. suum eggs appear to die and only few become infective while in the deep litter. However, a large fraction of eggs may remain viable for some time and could thus contaminate agricultural land and develop to infectivity, if the manure is not composted appropriately.
Note
None
CRAW tags
- AB - Utile à l'AB
- FREDO santé animale
- GEO Danemark
WEB tags
- ascaris suum eggs
- ammonia
- bedding material
- deep litter
- development
- moisture
- ph
- temperature
- viability
Titre de la publication
Parasitology
Volume
141
Pages
1646-1656
Date caractères
2014/10
Date publication
24 octobre 2014
Doi
10.1017/S0031182014000912
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Issn
0031-1820, 1469-8161
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