Ronald V. Ramirez

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We compared the Abbott Toxo immunoglobulin G (IgG) and IgM IMx assays with the Sabin-Feldman dye test and an IgM enzyme-linked immunosorbent assay (ELISA) in 398 serum samples previously tested in our laboratory (retrospective group) and 1,000 consecutive serum samples, tested as they were received in our laboratory in 1995 (prospective group). In the(More)
We examined the efficiency of detection of immunoglobulin M (IgM) antibodies to a 35-kDa antigen (P35) of Toxoplasma gondii for serodiagnosis of acute infection in pregnant women. A double-sandwich enzyme-linked immunosorbent assay (ELISA) with recombinant P35 antigen (P35-IgM-ELISA) was used for this purpose. On the basis of the clinical history and the(More)
OBJECTIVE Our goal was to determine the frequency of mother-to-child transmission of Toxoplasma gondii from human immunodeficiency virus-infected mothers who are also chronically infected with T. gondii. STUDY DESIGN One hundred thirty-eight women were entered into a prospective study of human immunodeficiency virus infection in pregnancy. The women were(More)
Toxoplasma immunoglobulin E (IgE) antibodies were evaluated in an immunosorbent agglutination assay (ISAGA) and an enzyme-linked immunosorbent assay (ELISA) to determine their usefulness in the diagnosis of acute infection with Toxoplasma gondii. IgE antibodies were not detected in serum specimens from otherwise seronegative individuals, individuals with(More)
We compared the Vitek immunodiagnostic assay for detection of immunoglobulin M (IgM) toxoplasma antibodies (VIDAS TXM) with an IgM enzyme-linked immunosorbent assay (ELISA) which we developed. A total of 407 serum samples from 391 adults were used for this study. We also examined 17 serial serum samples from four women who had seroconverted during(More)
The objective of the present study is to present our experience of introducing video-endoscopic surgical techniques applied to the diagnosis and treatment of pediatric cancer in the National Cancer Institute (NCI) of Bogota (Colombia), the reference state institution in this developing nation. The study is based on the large case load of the NCI, the(More)
A 63-year-old woman previously stable on a regimen of atorvastatin 40 mg daily, carvedilol 25 mg twice daily, digoxin 0.125 mg daily, furosemide 40 mg daily, spironolactone 25 mg daily, rivaroxaban 15 mg daily, and enalapril 20 mg twice daily for heart failure developed rhabdomyolysis 26 days after enalapril was stopped and sacubitril/valsartan (Entresto™)(More)
OBJECTIVE To determine if there was a difference in the long-term glycemic control, average daily dose, and cost of therapy in patients with noninsulin-dependent diabetes mellitus (NIDDM) treated with glyburide and glipizide in a health maintenance organization (HMO). DESIGN Retrospective evaluation of medical and pharmacy records. SETTING(More)
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