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Volume 31, Number 9—September 2025

Research Letter

Zoonotic Rat Lungworm Angiostrongylus cantonensis in Black Rats, Houston, Texas, 2024

Daniela A. Sierra, Tiana L. Sanders, Erin E. Edwards, Christine M. Molter, and Guilherme G. VerocaiComments to Author 
Author affiliation: Texas A&M University College of Veterinary Medicine and Biomedical Sciences, College Station, Texas, USA (D.A. Sierra, T.L. Sanders, G.G. Verocai); Texas A&M Veterinary Medicinal Diagnostic Laboratory, College Station (E.E. Edwards); Houston Zoo, Houston, Texas, USA (C.M. Molter)

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Figure 1

Histopathology of Angiostrongylus cantonensis rat lungworm infection in metropolitan black rats, Houston, Texas, 2024. A) Severe pulmonary consolidation due to verminous pneumonia. Adult nematode is visible within a large artery (arrow). Scale bar = 1.5 mm. B) Higher magnification of lung with numerous A. cantonensis larvae and eggs surrounded by granulomatous inflammation. Scale bar = 80 µm. C) Multiple adult A. cantonensis nematodes in right ventricle of the heart. Scale bar = 1.5 mm. D) Mild lymphoplasmacytic meningitis with cross sections of A. cantonensis nematodes. Scale bar = 300 µm.

Figure 1. Histopathology of Angiostrongylus cantonensis rat lungworm infection in metropolitan black rats, Houston, Texas, 2024. A) Severe pulmonary consolidation due to verminous pneumonia. Adult nematode is visible within a large artery (arrow). Scale bar = 1.5 mm. B) Higher magnification of lung with numerous A. cantonensis larvae and eggs surrounded by granulomatous inflammation. Scale bar = 80 µm. C) Multiple adult A. cantonensis nematodes in right ventricle of the heart. Scale bar = 1.5 mm. D) Mild lymphoplasmacytic meningitis with cross sections of A. cantonensis nematodes. Scale bar = 300 µm.

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Page created: August 11, 2025
Page updated: August 26, 2025
Page reviewed: August 26, 2025
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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