A study evaluated data from over 39 million fecal samples between 2012-2018. Results showed an increasing prevalence for roundworms, an increasing prevalence for hookworms, and a slightly decreasing prevalence for whipworms. Prevalence of both whipworm and roundworm peaked in the winter, while prevalence of hookworm peaked in the late summer and early autumn.

Read the full study by clicking on the link below:

Seasonality and changing prevalence of common canine gastrointestinal nematodes in the USA.