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Volume 32, Number 7—July 2026

Research Letter

Human Pulmonary Dirofilariasis,
North Queensland, Australia, 20231

Kimberley Murray, Emily Grahn, Andrew Stacey, Carly Hughes, Harsha Sheorey, Constantin Constantinoiu, Leslie Kuma, and Richard S. BradburyComments to Author 
Author affiliation: Townsville University Hospital, Townsville, Queensland, Australia (K. Murray, A. Stacey, C. Hughes, L. Kuma); James Cook University, Townsville (E. Grahn, C. Hughes, C. Constantinoiu, R.S. Bradbury); St Vincent’s Hospital Melbourne, Melbourne, Victoria, Australia (H. Sheorey); Royal Melbourne Hospital, Melbourne (H. Sheorey).

Main Article

Figure 2

Defining anatomic features of Dirofilaria immitis within a small blood vessel (arteriole) in a necrotic human lung granuloma, recovered from a patient with human pulmonary dirofilariasis in Queensland, Australia, 2023. Yellow arrowhead indicates inflated necrotic smooth cuticle, without cuticular ridges; blue arrowhead indicates degenerate coelomyarian muscle structure; red arrows indicate inflated and necrotic internal cuticular ridges; and black arrows indicate degenerate paired uterine tubes. Hematoxylin and eosin stain; original magnification is ×600.

Figure 2. Defining anatomic features of Dirofilaria immitis within a small blood vessel (arteriole) in a necrotic human lung granuloma, recovered from a patient with human pulmonary dirofilariasis in Queensland, Australia, 2023. Yellow arrowhead indicates inflated necrotic smooth cuticle, without cuticular ridges; blue arrowhead indicates degenerate coelomyarian muscle structure; red arrows indicate inflated and necrotic internal cuticular ridges; and black arrows indicate degenerate paired uterine tubes. Hematoxylin and eosin stain; original magnification is ×600.

Main Article

1This case was presented at the 2024 Royal College of Pathologists of Australasia Pathology Update Conference; Adelaide, Australia; 2024 Mar 1–3.

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