Depending on intensity and extent occurrence of infectious diseases can be distinguished accordingly: Sporadic – isolated cases of disease without obvious epidemiological connections Epidemical – mass occurrence of infectious disease in mutual epidemiological connection taking place in a limited territory for a certain amount of time. When two or more cases of disease occur in one family or hou...

BACKGROUND Leptospirosis is widespread in Mexico, yet the potential distribution and risk of the disease remain unknown. METHODOLOGY/PRINCIPAL FINDINGS We analysed morbidity and mortality according to age and gender based on three sources of data reported by the Ministry of Health and the National Institute of Geography and Statics of Mexico, for the decade 2000-2010. A total of 1,547 cases w...

ANDREA BENEDETTI, PhD†‡¶, MARK S. GOLDBERG, PhD†‡§, and MICHAL ABRAHAMOWICZ, PhD†║ † McGill University, Department of Epidemiology, Biostatistics and Occupational Health, Montreal, Canada ‡ McGill University, Department of Medicine, Montreal, Canada ¶ Montreal Chest Institute, Respiratory Epidemiology and Clinical Research Unit, Montreal, Canada §Royal Victoria Hospital, Division of Clinical Ep...

Clinical epidemiology versus public health epidemiology Epidemiology is growing, and so is the need for developing subspecialties. One subspecialty which has achieved a certain prominence is clinical epidemiology. The term had already been coined in 1938,1 and although it has many different interpretations,2 the growing number of textbooks providing an introduction to the area shows that it has...

BACKGROUND Underreporting occupational disease cases has been a long-standing problem in Taiwan, which hinders the progress in occupational health and safety. To address this problem, the government has founded the Network of Occupational Diseases and Injuries Service (NODIS) for occupational disease and injury services and established a new Internet-based reporting system. OBJECTIVES The aim...

epidemiology can be considered as a very old science. for example, john graunt, a statistician, published natural and political observations. in the bills of mortality in 1662, he analyzed the mortality rolls in london before the great plague, presented one of the first life tables, and reported time trends for many diseases. he provided statistical evidence for many theories on disease, and ch...

Meta-analysis is increasingly appearing in the epidemiologic literature. Although originally performed in the context of experimental or randomized controlled study designs and with regard to problems that are amenable to these designs, the method has also been applied to studies in observational epidemiologic settings. This movement has generated considerable debate about the validity of meta-...