Emily Kadolph
Constance Roderick
Julia S. Lankton
Rebecca A. Cole
Michelle Michalski
2021
<p><span>Several mortality events involving barn swallows (</span><i>Hirundo rustica</i><span>) and cliff swallows (</span><i>Petrochelidon pyrrhonota</i><span>) were reported in the Upper Midwestern states in 2017 and 2018. Barn swallow mortality followed unseasonal cold snaps, with the primary cause of death being emaciation with concurrent air sac nematodiasis. Lesions in cliff swallows were consistent with blunt force trauma from suspected car impacts. Examination of air sac nematodes from both bird species revealed morphological characters consistent with </span><i>Diplotriaena obtusa</i><span>. Sequence analysis of the partial </span><i>18S</i><span> rRNA gene indicated the samples clustered with other species in the genus </span><i>Diplotriaena</i><span>. These nematodes provide a link between morphological specimens and DNA sequence data for </span><i>D. obtusa</i><span>.</span></p>
application/pdf
10.1645/19-76
en
American Society of Parasitologists
Diplotriaena obtusa (Nematoda: Diplotriaenidae) from barn swallows (Hirundo rustica) and cliff swallows (Petrochelidon pyrrhonota) collected during mortality events in the Upper Midwest, USA
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