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Chronic obstructive pulmonary disease (COPD) is the most common chronic respiratory condition in adults and is characterized by progressive airflow limitation that is not fully reversible. The main etiological agents linked with COPD are cigarette smoking and biomass exposure but respiratory infection is believed to play a major role in the pathogenesis of(More)
Intense infections of a variant of Myxobolus procerus (Kudo, 1934) are described from trout-perch (Percopsis omiscomaycus (Walbaum)) collected in Duluth Harbor, Lake Superior, USA. This particular population of parasites has spores that are identical in shape (narrow pyriform) to those described for M. procerus except that they are significantly smaller(More)
The Eurasian monogenean Dactylogyrus amphibothrium Wagener, 1857 is reported from the gills of ruffe (Gymnocephalus cernuus) in western Lake Superior. The parasite must have arrived with fish discharged with ship ballast in the mid 1980s. It is the 12th species of monogenean known to have been introduced and established with its host in North America.
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