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Biomedical subjects

R C Anderson

Publications and source records attributed to R C Anderson.

At least 181 records · Page 10Linked to original sources
PubMed1977

Myxosporidan parasites for pumpkinseed (Lepomis gibbosus L.) from Ontario.

Five species of myxosporideans were found in pumpkinseed (Lepomis gibbosus L.) from Ryan Lake, Algonquin Park, Ontario. Myxobolus osburni Herrick 1936 was found in pancreatic tissue. Myxobilatus ohioensis (Herrick 1941) Davis 1944 was found in the ureters and urinary bladder. Three new species are described, namely, Myxobolus uvuliferis sp. n. (in the fibrous capsule surrounding the metacercariae of Uvulifer ambloplitis (Hughes 1927), Myxobolus magnaspherus sp. n. (in the parietal peritoneum) and Myxobolus dechtiari sp. n. (in the gills). Myxobolus uvuliferis sp. n. is most similar to M. osburni, but its spores are subspherical and not spherical. Myxobolus magnaspherus sp. n. is most similar to Myxobolus gigas Auerbach 1906, but its spores are wider than long, and they have exceedingly long polar filaments. Myxobolus dechtiari sp. n. is similar to Myxobolus karelicus Petruschewsky 1940 but it lacks an intercapsular appendix.

Animals↗
PubMed1976

Fetal and infant death, twinning and cardiac malformations in families of 2,000 children with and 500 without cardiac defects.

Analysis of family data on 2,000 children with a congenital cardiac malformation of unknown origin and 500 with an innocent murmur showed the incidence of twinning in probands, siblings and parents to be the same as in the general population. The mothers in the two groups of probands had the same incidence of spontaneous abortions and stillbirths. There was a small increase in infant mortality in siblings of probands with a cardiac malformation, but this could be accounted for by the increased incidence of cardiac malformations. The latter occurred in 1.4 percent of all siblings and in 1.7 percent of later born siblings. Complete concordance for malformation type occurred in 31 percent of affected siblings and 46 percent of affected parents, and partial concordance occurred in an additional 21 and 8 percent, respectively. Combined direct and indirect observations and calculations indicate that the risk of recurrent cardiac malformations is 1.4 to 3 percent in families in which one child was born with a cardiac malformation of unknown origin; no significant difference was evident for the various cardiac malformations.

Adult↗
PubMed1976

Ixodes scapularis Say on white-tailed deer (Odocoileus virginianus) from Long Point, Ontario.

Ixodes scapularis Say was the only species of tick found on white-tailed deer, Odocoileus virginianus, collected at Long Point, Ontario from October 1972 to August 1973. Adults were most abundant from September 1972 to April 1973. Larvae were found throughout the study period except during February. Nymphs were scarce during winter months but fairly common during spring and summer. Most adults were found on the neck and shoulders. Larvae occurred mainly on lower regions of the body and nymphs mainly on the head, shoulders, forelegs and brisket.

Animals↗
PubMed1975

Operative repair of atrial septal defect without cardiac catheterization.

Thirty-three children with secundum or sinus venosus atrial septal defects underwent operative correction at the University of Minnesota Hospitals between January, 1972, and December, 1973. Nineteen of these patients (58%) did not have cardiac catheterization as part of their preoperative evaluation, since clinical assessment of the child, with or without corroborative evidence obtained by echocardiography and radionuclide angiocardiography, provided sufficient information to permit recommendation of operation. In the majority of patients with uncomplicated atrial septal defect, cardiac catheterization is not a necessary part of the preoperative evaluation and may be reserved for those patients with unusual clinical or laboratory features.

Adolescent↗