Worldwide map depicting distribution of MDV whereby evidence for presence has been submitted to the OIE. Distribution data was obtained from the World Organization for Animal Health (OIE) distributed through the World Animal Health Information Database (WAHIS) interface and summarized above based on absence (blue) and presence of disease with reported cases (red) before and after 2009. A World map depicting countries positive for MDV was constructed using the imapbuilder software. Both China and Egypt (black) are endemic areas for MDV with outbreaks reported on a yearly basis. B Pie chart demonstrates the number of countries that have reported MDV cases to the OIE based on their geographical location (continent). Data is summarized based on absence (blue), and presence of disease with reported cases (red).