01965nas a2200205 4500008004100000245014500041210006900186300001200255490000700267520126000274653002601534653002601560653001401586653001501600653001801615100001701633700001901650700002001669856007001689 2002 eng d00aHistological Analysis of Trematodes in Dreissena polymorpha: Their Location, Pathogenicity, and Distinguishing Morphological Characteristics0 aHistological Analysis of Trematodes in Dreissena polymorpha Thei a856-8630 v883 a

Four families of trematodes were observed in histological sections during a 1992–1997 investigation of the parasites of zebra mussels Dreissena polymorpha. These included Aspidogastridae, i.e., Aspidogaster, Echinostomatidae, Bucephalidae, i.e., Bucephalus polymorphus, and Gorgoderidae, i.e., Phyllodistomum folium. This article describes the precise location of these trematodes in the tissues of D. polymorpha, provides graphic evidence of their effect on the organs they inhabit, and highlights the distinguishing morphological characteristics. Evidence of defense reaction of host to trematode infection, i.e., encapsulation of Aspidogaster and nacrezation of B. polymorphus, is also presented and is the first such report for zebra mussels. The histological photomicrographs included represent the first comprehensive series published on trematode infection of zebra mussels. These images, in conjunction with the morphological descriptions presented, should assist researchers in identifying the 4 major trematode taxa that they are likely to encounter in the tissue sections of zebra mussels.

10aDreissena polymorpha.10ahistological sections10aParasites10atrematodes10aZebra mussels1 aLaruelle, F.1 aMolloy, D., P.1 aRoitman, V., A. uhttp://dx.doi.org/10.1645/0022-3395(2002)088[0856:HAOTID]2.0.CO;202018nas a2200217 4500008004100000245016600041210006900207300001200276490000700288520126000295653002501555653002601580653001401606653001501620653001801635100001701653700001901670700001801689700002301707856007001730 1999 eng d00aHistological Analysis of Mantle-cavity Ciliates in Dreissena polymorpha: Their Location, Symbiotic Relationship, and Distinguishing Morphological Characteristics0 aHistological Analysis of Mantlecavity Ciliates in Dreissena poly a251-2570 v183 a

Four families of trematodes were observed in histological sections during a 1992–1997 investigation of the parasites of zebra mussels Dreissena polymorpha. These included Aspidogastridae, i.e., Aspidogaster, Echinostomatidae, Bucephalidae, i.e., Bucephalus polymorphus, and Gorgoderidae, i.e., Phyllodistomum folium. This article describes the precise location of these trematodes in the tissues of D. polymorpha, provides graphic evidence of their effect on the organs they inhabit, and highlights the distinguishing morphological characteristics. Evidence of defense reaction of host to trematode infection, i.e., encapsulation of Aspidogaster and nacrezation of B. polymorphus, is also presented and is the first such report for zebra mussels. The histological photomicrographs included represent the first comprehensive series published on trematode infection of zebra mussels. These images, in conjunction with the morphological descriptions presented, should assist researchers in identifying the 4 major trematode taxa that they are likely to encounter in the tissue sections of zebra mussels.

10aDreissena polymorpha10ahistological sections10aParasites10atrematodes10aZebra mussels1 aLaruelle, F.1 aMolloy, D., P.1 aFokin, S., I.1 aOvcharenko, M., A. uhttp://dx.doi.org/10.1645/0022-3395(2002)088[0856:HAOTID]2.0.CO;2