Figure 1From: Hepatitis E virus chronic infection of swine co-infected with Porcine Reproductive and Respiratory Syndrome Virus Experimental design of the co-infection experiment. Inoculated and susceptible contact animals are represented by black triangles and white diamonds, respectively. Rooms 2 and 3 contained three pens housing three HEV/PRRSV co-inoculated (black triangles) and three susceptible contact pigs (white diamonds). One negative control group was housed in Room 1.Back to article page