Figure 1. Dirofilaria immitis seen by hematoxylin and eosin stain of a resected lung nodule.

Figure 2. Dirofilarial nematode seen by reticulin stain, from resected lung nodule.

Figure 3. Dirofilarial nematode seen in cross-section by reticulin stain.

For Figure 1, please refer to the Welcome and Contributing Authors page for the list of IDSA 2002 Contributors. Copyright 40th Annual Meeting of Infectious Disease Society of America (IDSA), 2002. Used with permission.

Figures 2 and 3 were contributed by Richard L. Kradin, M.D., Department of Pathology, Massachusetts General Hospital and Harvard Medical School, Boston, MA.

1. National Library of Medicine 2013 MeSH Scope Note and Classification