Day 203 of #LMB365 from Kevin Takaki in Lalita Ramakrishnan’s group shows macrophages attacking and encasing a parasite schistosoma egg within a larval zebrafish. Schistosoma, known as blood flukes, are parasitic flatworms responsible for a significant group of infections in humans. They infect and lay their eggs within the vasculature of their human hosts and the eggs and the host immune response to these are a major cause of pathology.