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31 March 2020 Lungworm (Crenosoma goblei) Infection in Unweaned Free-Ranging Raccoons (Procyon lotor) in Washington State, USA
Bethany A. Groves, Michael J. Yabsley, Liandrie Swanepoel, Michael M. Garner
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Abstract

Larval parasites morphologically identified as Crenosoma goblei were found in orphaned raccoons (Procyon lotor) admitted to a wildlife rehabilitation center in Washington State, US. Partial 18S rRNA and cytochrome oxidase I gene sequences were most similar to other Crenosoma spp. Although commonly reported in free-ranging raccoons throughout much of the central and eastern US, this finding extends the range of C. goblei into the Pacific Northwest of North America. Fecal samples taken within 48 h of admission were positive for larvae in 70% (21/30) of individuals and in all five group samples taken from an additional 14 raccoons. Typically, Crenosoma spp. use an intermediate host, but the unweaned status of all the raccoons in this report suggests a potential direct, possibly vertical, route of transmission. Serial fecal analysis of pooled samples collected over several subsequent months demonstrated spontaneous resolution of larval shedding. Adult worms and gross evidence of pneumonia were detected in the lungs of several juvenile raccoons at necropsy, and verminous pneumonia was confirmed histologically in the single case submitted. Clinical signs directly attributable to verminous pneumonia were not seen in most actively shedding raccoons, suggesting that subclinical disease among juveniles may be common.

© Wildlife Disease Association 2020
Bethany A. Groves, Michael J. Yabsley, Liandrie Swanepoel, and Michael M. Garner "Lungworm (Crenosoma goblei) Infection in Unweaned Free-Ranging Raccoons (Procyon lotor) in Washington State, USA," Journal of Wildlife Diseases 56(2), 419-423, (31 March 2020). https://doi.org/10.7589/2019-03-060
Received: 10 March 2019; Accepted: 25 July 2019; Published: 31 March 2020
KEYWORDS
Crenosoma
lungworm
neonate
raccoon
rehabilitation
verminous pneumonia
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