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Featured researches published by Rolando Armijo.


Public Health Reports | 1959

Two Poisoning Outbreaks in Puerto Rico from Salt Preserved Codfish.

Alfonse T. Masi; Rafael A. Timothee; Rolando Armijo; Darwin Alonso; Luis E. Mainardi

IN THE FALL of 1957 Puerto Rican health authorities investigated a mass outbreak of food poisoning at the Ponce District Hospital and another at the institution for juvenile delinquents of San Juan. Both events were presumably caused by staphylococcal enterotoxins involving a common vehicle-salt-preserved codfish (Atlantic). The food in this form had not previously been incriminated in such intoxications. The incident at the hospital, involving a reported 303 patients in a total population of 457, occurred following lunch on September 5, 1957. There were no reports of acute gastroenteritis in the community outside the hospital. In the juvenile institution, the outbreak followed lunch on November 27, 1957, affecting 236 inmates out of a total of 320. Both outbreaks were first reported to local public health authorities, who in turn informed the bureau of communicable disease control in the Puerto Rico Department of Health.


Public Health Reports | 1968

Epidemiologic aspects of abortion in Chile.

Rolando Armijo; Mariano Requena

THE INCIDENCE of abortion in Chile has increased during the last decades, and abortion is nlow a major health problem with implications in a nuimber of scientific fields. The majority of studies in the past were based on hospital data, which did not really reflect what happened in the community where the abortion originated. From an epidemiologic viewpoint, little was known about the number of and reasons for abortions, the most vulnerable groups in the female population, or the causes and other features describing the natural history of abortion. The methods of approach used in several studies in Chile are critically reviewed in some detail. Five major steps were use of available raw data and preliminary studies, studies of abortion as a hospital problem, community retrospective studies, prospective studies, and evaluation of conltrol measures.


International Journal of Epidemiology | 1975

Epidemiology of Stomach Cancer in Chile—The Role of Nitrogen Fertilizers

Rolando Armijo; Anne H. Coulson


International Journal of Epidemiology | 1981

Epidemiology of Gastric Cancer in Chile: I — Case-Control Study

Rolando Armijo; Marcial Orellana; Ernesto Medina; Anne H. Coulson; James Sayre; Roger Detels


American Journal of Public Health | 1957

Food Poisoning Outbreaks Associated with Spray-Dried Milk—An Epidemiologic Study

Rolando Armijo; Donald A. Henderson; Rafael A. Timothee; Harold B. Robinson


Revista Medica De Chile | 1970

Epidemiology of gastric cancer in Chile.

Rolando Armijo; Roger Detels; Anne H. Coulson; Medina E; Marcial Orellana; González A


International Journal of Epidemiology | 1982

Epidemiology of Gastric Cancer in Chile. III. Diagnostic Practices in Santiago, 1976–8

Rolando Armijo; James Sayre; Rosa Llavina De Navarro


Boletín de la Oficina Sanitaria Panamericana (OSP) | 1967

Prevalencia de portadores tíficos después del tratamiento con cloramfenicol

Rolando Armijo; Aída Pizzi; Hernán Lobos


Archive | 1981

EPIDEMIOLOGIA DEL CAMCER GASTRICO ElU CHILE

Rolando Armijo; Roger Detels; Arme H. Coulson


Reunion de la Asociacion Americana de Salud Publica, 94 | 1967

Aspectos epidemiologicos del aborto

Rolando Armijo; Mariano Requena

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Roger Detels

University of California

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James Sayre

University of California

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