The prevalence among
those carcasses collected in summer, including those in June, July
and August, was significantly higher than those collected in
autumn (including September, October and November, P ¼ 0.001)
and those collected in winter (including December, January and
February, P < 0.001), but not significantly different from those
collected in spring (including March, April and May, P ¼ 0.177).