Microbiology in the Andes: Ancient and Unexpected 
Elio Schaechter of Small Things Considered highlights some of the scientific development that took place centuries ago in Quito, the present-day capital of Ecuador.
Snippet:
"In 1589 a smallpox epidemic killed 37.5% of Quito’s inhabitants. A description of the disease in a letter by one of the priests makes clear allusion to its contagiousness. Later on, several of the Jesuits made insightful observations about the etiology of infectious diseases. Among them was Juan Magnin (1701-1753), a Swiss missionary who became a member of the French Academy of Sciences, who stated: There are microbes that can only be seen with a microscope that are 27 million times smaller than the smallest that can be seen with the naked eye. These facts and others seem incredible.
And …(the microscope) allows to establish that the dirt on the teeth is due to the accumulation of innumerable microbes; furthermore, it is likely that many of the diseases of the human body, especially leprosy and venereal diseases, are due to the accumulation of microbes."
Click source for more.
Snippet:
"In 1589 a smallpox epidemic killed 37.5% of Quito’s inhabitants. A description of the disease in a letter by one of the priests makes clear allusion to its contagiousness. Later on, several of the Jesuits made insightful observations about the etiology of infectious diseases. Among them was Juan Magnin (1701-1753), a Swiss missionary who became a member of the French Academy of Sciences, who stated: There are microbes that can only be seen with a microscope that are 27 million times smaller than the smallest that can be seen with the naked eye. These facts and others seem incredible.
And …(the microscope) allows to establish that the dirt on the teeth is due to the accumulation of innumerable microbes; furthermore, it is likely that many of the diseases of the human body, especially leprosy and venereal diseases, are due to the accumulation of microbes."
Click source for more.
