Dirofilaria immitis is a canine heartworm (nematode parasite) that can occasionally infect humans. Most reported cases are pulmonary or subcutaneous dirofilariasis, but there have been a few reports in unusual sites such as large vessels, mesentery, peritoneal cavity, spermatic cord. A unique case of human hepatic Dirofilaria has also been published. Humans are dead-end hosts. We report a case of pulmonary dirofilariasis in a 55 year-old male, who was a heavy smoker and who presented to the hospital suffering from thoracic pain located in the midsternal area.

Key words: Lung, pulmonary dirofilaria, pulmonary infarct, x-ray, histology.

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