Washing machine appliance having one or more ventilation features

A washing machine appliance, as provided herein, may include a cabinet, a tub, a wash basket, a ventilation line, and an antimicrobial body. The cabinet may include a front panel defining an opening. The tub may be positioned within the cabinet. The wash basket may be rotatably mounted within the tub. The wash basket may define a wash chamber for receiving articles for washing. The ventilation line may be in fluid communication with the tub. The ventilation line may define an air path from a ventilation inlet within the cabinet. The air path may extend to a ventilation outlet in fluid communication with an ambient environment outside of the cabinet. The antimicrobial body may be positioned along the ventilation line.