Seasonality and the effects of weather on Campylobacter infections
Posted on 2019-03-13 - 05:00
Abstract Background Campylobacteriosis is a major public health concern. The weather factors that influence spatial and seasonal distributions are not fully understood. Methods To investigate the impacts of temperature and rainfall on Campylobacter infections in England and Wales, cases of Campylobacter were linked to local temperature and rainfall at laboratory postcodes in the 30 days before the specimen date. Methods for investigation included a comparative conditional incidence, wavelet, clustering, and time series analyses. Results The increase of Campylobacter infections in the late spring was significantly linked to temperature two weeks before, with an increase in conditional incidence of 0.175 cases per 100,000 per week for weeks 17 to 24; the relationship to temperature was not linear. Generalized structural time series model revealed that changes in temperature accounted for 33.3% of the expected cases of Campylobacteriosis, with an indication of the direction and relevant temperature range. Wavelet analysis showed a strong annual cycle with additional harmonics at four and six months. Cluster analysis showed three clusters of seasonality with geographic similarities representing metropolitan, rural, and other areas. Conclusions The association of Campylobacteriosis with temperature is likely to be indirect. High-resolution spatial temporal linkage of weather parameters and cases is important in improving weather associations with infectious diseases. The primary driver of Campylobacter incidence remains to be determined; other avenues, such as insect contamination of chicken flocks through poor biosecurity should be explored.
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Djennad, Abdelmajid; Lo Iacono, Giovanni; Sarran, Christophe; Lane, Christopher; Elson, Richard; Höser, Christoph; et al. (2019). Seasonality and the effects of weather on Campylobacter infections. figshare. Collection. https://doi.org/10.6084/m9.figshare.c.4433432.v1
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AUTHORS (14)
AD
Abdelmajid Djennad
GL
Giovanni Lo Iacono
CS
Christophe Sarran
CL
Christopher Lane
RE
Richard Elson
CH
Christoph Höser
IL
Iain Lake
FC
Felipe Colón-González
SK
Sari Kovats
JS
Jan Semenza
TB
Trevor Bailey
AK
Anthony Kessel
LF
Lora Fleming
GN
Gordon Nichols