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MRSA in pig farms: a prospective cohort study
BMC Proceedings volume 5, Article number: P19 (2011)
Introduction / objectives
The aims of this study were to determine the prevalence, determinants and dynamics of human carriage of livestock associated methicillin-resistant Staphylococcus aureus (MRSA) in pig farms.
In this prospective cohort study in 50 pig farms in The Netherlands, human nasal samples were collected on 5 time points in 8 months. At start of the study, throat samples and environmental samples were taken. Persistent carriers were defined as persons with 100% of nasal samples positive for MRSA, non-carriers had no MRSA and intermittent carriers had at least one positive sample. Data collection is still ongoing (total follow-up 1 year).
In total, 281 persons participated in the study. At start of the study, 21% of household members (31/147) and 68% of farmers/employees (90/132) were MRSA positive in nose or throat. Fifty-four persons were persistent MRSA carriers (54/281=19%): 5 household members (5/149=4%) and 49 farmers/employees (49/132=37%). Furthermore, 79 intermittent carriers and 148 non-carriers were found. Sixty-seven percent (33/49) of the residences and 80% (40/50) of the stables harboured MRSA. Working in the stables on a daily base and presence of MRSA in throat samples were significantly associated with persistent carriage (OR=12.7, 95%CI 4.1-39.3, and OR=5.0, 95%CI 2.3-10.9, respectively).
Persistent MRSA nasal carriage is common in persons working at pig farms. A possible explanation is the frequent exposure to high amounts of MRSA in the stables. Working in the stables still is an important factor in persistent carriage, as is throat carriage.
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Cleef, B., Benthem, B., Teuwen, R. et al. MRSA in pig farms: a prospective cohort study. BMC Proc 5, P19 (2011). https://doi.org/10.1186/1753-6561-5-S6-P19
- Staphylococcus Aureus
- Daily Base
- Environmental Sample
- Prospective Cohort Study
- Positive Sample