Biomedical subjects
D N Brown
Publications and source records attributed to D N Brown.
Ischemic colitis related to cocaine abuse.
It is well recognized that cocaine use can be associated with serious cardiovascular complications, including myocardial infarction. Several case reports have recently linked the use of cocaine with ischemic events of the small bowel and colon. We report a case of ischemic colitis complicated by perforation in a 47-yr-old diabetic man which occurred after recreational cocaine use. The older age of the patient and underlying diabetes mellitus were unique aspects of our case, compared with others reported in the literature. The patient's history of cocaine use was not initially identified. After we obtained a negative arteriogram result, we went back to the patient and the information was revealed. The literature regarding intestinal ischemia related to cocaine and other drugs/medications is reviewed. The abuse of cocaine should be considered in the differential diagnosis of acute intestinal vascular insufficiency syndromes.
Short-term re-epithelialization of the alkali-burned rabbit cornea.
Pfister and associates have shown that treatment with citrate solution reduces the incidence of stromal ulceration after alkali burn of the cornea. In the course of study of the effect of inhibitors of plasminogen activation on corneal re-epithelialization following alkali burns, we noted that when citrate was used in the medication, the healing process proceeded rapidly for three days; however, the denuded area became abruptly larger on the fourth day, and then resumed healing on the fifth day.
Orbital tumors in children.
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Anopheles vestitipennis, the probable vector of Plasmodium vivax in the Lacandon forest of Chiapas, México.
Baseline studies to evaluate the role of different anopheline mosquitoes as probable vectors of malaria in the Lacandon rainforest region in Chiapas (México) were carried out in 3 rural villages between June and November 1988. Anopheles vestitipennis was the most abundant species in all the villages, followed by An. albimanus, An. punctimacula and An. darlingi. Human bait collections showed that An. vestitipennis and An. albimanus tended to bite man either indoors or outdoors, while An. punctimacula preferred to bite outdoors. Monthly man-biting rates of An. vestitipennis tended to follow the rainfall pattern. Plasmodium vivax was detected in An. vestitipennis only, with an estimated overall infection rate of 4.67 per 1000 mosquitoes (range 0-54.42, of 3500 mosquitoes assayed). This is the first incrimination of An. vestitipennis as a probable vector of P. vivax in México.