Figure 3 Annual seroprevalence of IgM for Japanese encephalitis
virus in pigs in eastern Uttar Pradesh by district, October 2017 –
December 2022. Bars indicate 95% confidence intervals.
Red line = loess smoothed seroprevalence.
No significant linear trend was observed in the time series of monthly
IgM seroprevalence (overall change in seroprevalence = -2.1%/month
[95% CI -4.5—0.4], P = 0.10). Time series decomposition revealed
a marked seasonal pattern consisting of four annual peaks with the
highest peak in August – September (monsoon season). However, the
greatest variation in seroprevalence was due to the remainder (random)
portion of the decomposed time series (range -22.3—43.7% adjustment
to trend line).