RISK OF GASTROENTERITIS IN RURAL AREAS OF QUEBEC WITH INTENSIVE ANIMAL FARMING
Notice bibliographique
Résumé
Objectives Intensive animal farming is increasing in Quebec and there is some concern from the public and Medical Officers of Health that this could contaminate groundwater and potentially adversely affect health. According to phophorus's absorption by crops and vulnerability of groundwater, the province of Quebec has declared some rural areas in excess for production of animal manure. A moratorium on the construction of new hog farms was undertaken, and a study to evaluate the potential health impact of intensive animal farming in seven high risk watersheds was conducted. This study evaluated the risk of gastroenteritis in well water users in areas overloaded with manure versus controls using well water in non-overloaded rural areas. Methods 923 rural families living in sectors overloaded with manure (exposed group), and 241 rural families living in control sectors from the same watersheds were visited at home by a technician during Spring 2002. Water samples from each family's well were taken and analysed for Escherichia coli, entcroccocci, and male-specific coliphages. Water consumption habits and gastro-intestinal symptoms were measured by questionnaire for all family members for the week prior to the technician visit and a health diary was completed for the week following the visit. Risk factors for gastro-enteritis (age, gender, presence of chronic gastrointestinal illness, dietary habits, contact with animals and occupation) were assessed by questionnaire and were controlled for in the analysis. Results The period prevalence of highly credible gastro-enteritis (HCGI) and diarrhea was similar in the exposed compared to the control group: 9.5 % vs 9.6 % for HCGI (p = 0.93) and 3.2% vs 4.0% for diarrhea (p = 0.40). Among well water consumers, the adjusted Odds Ratio (OR) for exposure was 0.94 (95% CI: 0.64–1.38) for HCGI and 0.71 (95% Cl: 0.39–1.31) for diarrhea. Contamination of well water was rare and slightly lower in the exposed group: 1.3% vs 1.7% (p = 0.76) for E. coli, and 4.9% vs 7.9% for enterococci (p = 0.08). Contamination by male-specific coliphages was rarely found (0.1% vs 0.4%, p = 0.37). Prevalence of HCGI was lower in the second week of the study, and risk of gastro-enteritis during this period was higher in heads of families using contaminated water: 9.8% vs 2.9% for those using uncontaminated water (p = 0.014). Conclusion Contamination of groundwater by microbiological indicators at the time of the study was rare, and the risk of gastro-enteritis for well water users in areas overloaded with manure was not increased. Limits of this study include: sample size, time of sampling, prevalence data and assessment of the exposure to animal manure using a sector-level variable. Those limits should be taken into account when interpreting these results. Acknowledgements the Quebec ministries of Environment, Health and Agriculture funded this study.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,001 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,001 |
| Études des sciences et des technologies | 0,001 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,003 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».