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Volume 32, Number 2—February 2026

Dispatch

Autochthonous Rat Lungworm Angiostrongylus cantonensis Infections in Accidental and Definitive Hosts, San Diego, California, USA

Shotaro NakagunComments to Author , Carlo G. Gonzalez Vera, Alexis Wohl, Deana L. Clifford, Garrett A. Fraess, Jordyn R. Nylander, Estefanía Montero, Javier Asin, Steven V. Kubiski, and Rachel E. Burns
Author affiliation: Author affiliations: San Diego Zoo Wildlife Alliance, San Diego, California, USA (S. Nakagun, C.G. Gonzalez Vera, G.A. Fraess, J.R. Nylander, S.V. Kubiski, R.E. Burns); San Diego Humane Society’s Project Wildlife, San Diego (A. Wohl); California Department of Fish and Wildlife, Rancho Cordova, California, USA (D.L. Clifford); Universidad Cardenal Herrera-CEU, CEU Universities, Valencia, Spain (E. Montero); California Animal Health and Food Safety Laboratory, University of California, Davis, San Bernardino, California, USA (J. Asin)

Main Article

Figure 2

Lung tissue from a roof rat (Rattus rattus) with autochthonous rat lungworm Angiostrongylus cantonensis infection, San Diego, California, USA, 2025. Hematoxylin and eosin stain of pulmonary arteries with intravascular adult metastrongyle nematodes have severe endothelial proliferation. The surrounding lung parenchyma is replaced by granulomatous inflammation centered on numerous larvated and morulated eggs. Scale bar indicates 250 µm.

Figure 2. Lung tissue from a roof rat (Rattus rattus) with autochthonous rat lungworm Angiostrongylus cantonensis infection, San Diego, California, USA, 2025. Hematoxylin and eosin stain of pulmonary arteries with intravascular adult metastrongyle nematodes have severe endothelial proliferation. The surrounding lung parenchyma is replaced by granulomatous inflammation centered on numerous larvated and morulated eggs. Scale bar indicates 250 µm.

Main Article

Page created: January 29, 2026
Page updated: February 19, 2026
Page reviewed: February 19, 2026
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