Ricardo G. Hahn

Learn More
BACKGROUND Colonoscopy visualizes more of the colon than flexible sigmoidoscopy. This study compares the outcomes of an unsedated modified colon endoscopy (MCE) with flexible sigmoidoscopy (FS) in family medicine practice. METHODS We conducted a retrospective chart review of existing clinical data to compare outcomes for 48 patients undergoing MCE and 35(More)
Group A beta-hemolytic streptococcal pharyngitis, scarlet fever, and rarely asymptomatic carrier states are associated with a number of poststreptococcal suppurative and nonsuppurative complications. As in streptococcal pharyngitis, acute rheumatic fever, pediatric autoimmune neuropsychiatric disorders associated with streptococcal infection, and(More)
BACKGROUND Some doubt the desirability and cost-effectiveness of continuing to provide an expanded scope of primary care practice. Additionally, there has been concern about declining reimbursement from Medicaid and Medicare. Although an expanded scope of patient care services are required for training, we wanted to determine whether these services drain(More)
The essentiality of arginine for initiation of growth of arginine-utilizing, nonglycolytic Mycoplasma species from small populations was studied by growing the organisms in a semisynthetic medium proven to be free from arginine by chemical and biological assays. Initiation of growth of two strains of M. arginini did not require arginine, whereas another(More)
BACKGROUND Many countries in Latin America are seeking to expand primary care services provided through their health care systems. Family physicians are an essential component of an effective primary care workforce, but we know little about the status of family practice training in Latin America. This study examines predoctoral training in family practice(More)
Three types of filters, silver, polycarbonate, and cellulose, were evaluated for permeability toward poliovirus suspended in water, salt-containing, and proteinaceous solvents. The ability of virus to pass through cellulose filters depended on the suspending medium; virus did not pass through cellulose filters in either water or salt solution, whereas the(More)
Family physicians have a responsibility to their peers and patients to participate in malpractice litigation in a manner that ensures that evidence is properly and thoroughly evaluated. Family physicians have not routinely involved themselves as expert witnesses in medical malpractice litigation because of lack of training, misconceptions about their role,(More)