Biomedical subjects

D A Pollock

Publications and source records attributed to D A Pollock.

39 records · Page 3Linked to original sources

PubMedDate not supplied

Production and preliminary characterization of monoclonal antibodies to chicken anemia agent.

Mice were immunized with partially purified preparations of the Cux-1 isolate of chicken anemia agent (CAA), and their splenocytes were fused with NSO myeloma cells. Three patterns of staining of CAA-infected cells were recognized when the resulting hybridomas were screened by indirect immunofluorescence (IIF). Hybridomas representative of each staining pattern were cloned, and the monoclonal antibodies (MAbs) were characterized. Type 1 staining was indistinguishable from that produced by polyclonal chicken antisera to CAA. Type 2 staining was confined to large nuclear inclusions. Type 3 staining was predominantly nuclear and granular, and differed from type 1 in being more intense and occurring in a higher proportion of nuclei. Three MAbs producing type 1 staining were predominantly Cux-1-specific by IIF; they also reacted to lower titers with the Gifu-1 isolate but not at all with three other CAA isolates. These MAbs had very slight neutralizing activity against Cux-1. Another MAb giving type 1 staining reacted with all CAA isolates tested to high titers in IIF and neutralization tests. MAbs with type 2 and type 3 staining reacted by IIF with all CAA isolates tested but possessed no neutralizing activity. The availability of MABs to CAA should facilitate development of diagnostic tests for the virus.

Animals↗

PubMedDate not supplied

Temporal and geographic trends in the autopsy frequency of blunt and penetrating trauma deaths in the United States.

OBJECTIVE: To examine national trends in the percentage of blunt and penetrating trauma deaths autopsied. DESIGN, SETTING, AND PARTICIPANTS: For each year from 1980 through 1989, we used national mortality data files to determine the autopsy frequency (percentage of deaths autopsied) of all deaths in the United States. We analyzed variation in the autopsy frequency of blunt and penetrating trauma deaths by cause of injury and place of occurrence of death. RESULTS: The autopsy frequency of blunt and penetrating trauma deaths in the United States increased by 14.3% during the 1980s to 58.9% in 1989 (62,004 of 105,309 deaths autopsied), while the autopsy frequency of all deaths decreased by 23.6% during the same period to 11.5% in 1989 (248,272 of 2,153,859 deaths autopsied). Among trauma deaths, homicides remained far more likely to be autopsied than nonhomicides (deaths due to unintentional injuries, suicides, and injuries of undetermined intentionality). The autopsy frequency of homicidal trauma deaths in 1989 was 90.0% or higher in 44 states and ranged from 79.6% in Mississippi to 100.0% in six states. The autopsy frequency of nonhomicidal trauma deaths in 1989 was 90.0% or higher in two states and ranged from 10.3% in Oklahoma to 94.5% in Hawaii. Nationwide, we found significant differences in the autopsy frequency of trauma deaths in 1989 between metropolitan and nonmetropolitan counties, both for homicides (97.7% vs 89.3%; P < .001) and nonhomicides (58.2% vs 29.9%; P < .001). CONCLUSIONS: The percentage of blunt and penetrating trauma deaths autopsied has increased recently in the United States, but extensive geographic variation in autopsy frequency suggests that the benefits of autopsy findings for trauma care quality improvement and public health surveillance of injuries are distributed unevenly throughout the nation.

Autopsy↗

PubMedDate not supplied

Indocyanine green angiography for recurrent choroidal neovascularization in age-related macular degeneration.

BACKGROUND AND OBJECTIVE: Recurrence of choroidal neovascular membranes (CNV) occurs frequently following laser photocoagulation. Recurrent CNV can be difficult to treat because they may not be well defined by fluorescein angiography. PATIENTS AND METHODS: The fluorescein and indocyanine green (ICG) angiograms of 58 eyes of 57 patients who presented with clinically suspected recurrence were evaluated retrospectively. RESULTS: In 14 eyes (24%), a well-defined recurrent CNV could be identified by evaluating the fluorescein angiogram. In 6 (14%) of the remaining 44 eyes, a well-defined recurrent CNV was identifiable by ICG angiography. CONCLUSION: A role for ICG angiography in the care of patients with suspected recurrent CNV is discussed.

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