Fig. 1

Morphology of leukocytes and the parasite in the BAL sample of a domestic pig under light microscope. Cells were harvested by bronchoalveolar lavage (BAL) from the pig lung, and immediately deposited onto glass slide. Photomicrographs were captured at 20 magnification under light microscope. To note, except the granulocyte, there were the active parasites with flagella (arrow) under microscope