Geology topics

Constance L. Roderick

Publications and source records attributed to Constance L. Roderick.

3 recordsLinked to original sources

USGS2000

Biological and molecular characterizations of Toxoplasma gondii strains obtained from Southern sea otters (Enhydra lutris nereis)

Toxoplasma gondii was isolated from brain or heart tissue from 15 southern sea otters ( Enhydra lutris nereis ) in cell cultures. These strains were used to infect mice that developed antibodies to T. gondii as detected in the modified direct agglutination test and had T. gondii tissue cysts in their brains at necropsy. Mouse brains containing tissue cysts from 4 of the strains were fed to 4 cats. Two of the cats excreted T. gondii oocysts in their feces that were infectious for mice. Molecular analyses of 13 strains indicated that they were all type II strains, but that they were genetically distinct from one another.

California↗

USGS1996

Helminth parasites of the osprey, Pandion haliaetus, in North America

A total of 28 species of helminths (17 trematodes, 3 cestodes, 7 nematodes, and 1 acanthocephalan) was recovered from 17 ospreys ( Pandion haliaetus ) from the United States. Intensities of infection were low and no lesions were attributed to the parasites. Seven species appear to be specialists in ospreys, 2 species generalists in raptors, and the remainder generalists in other orders of fish-eating birds. Pandiontrema rjikovi , Diasiella diasi , and Contracaecum pandioni are reported for the first time from North America.

Florida, Maryland, Massachusetts, Montana, South C↗

USGS1995

Bothrigaster variolaris (Trematoda: Cyclocoelidae) infection in two Florida snail kites (Rostrhamus sociabilis plumbeus)

Two Florida snail kites ( Rostrhamus sociabilis plumbeus , Say) collected in August and December 1993 from Osceola County (28°15′N, 81°17′W) and Glades County (26°45′N, 81°10′W), Florida (USA), respectively, were infected with Bothrigaster variolaris (Trematoda: Cyclocoelidae); this parasite has not been reported previously from birds in the United States. One bird, a fledgling female, harbored 270 specimens of B. variolaris ; the helminths caused airsacculitis and bronchitis, possible contributing factors in the death of this bird. The other bird, a subadult female, was infected with 40 trematodes and had gross and microscopic lesions consistent with trauma as the cause of death.

Florida↗