INFECTIOUS DISEASES WHAT IS INFECTIOUS DISEASE A disease

INFECTIOUS DISEASES

WHAT IS INFECTIOUS DISEASE? “A disease due to the presence of an infective particle, especially a microbial pathogenic agent that is capable of being transmitted to another host. ” - From biology-online. org/dictionary Microbial pathogenic agent can be bacteria, virus or fungi

PANDEMIC VS. EPIDEMIC VS. ENDEMIC Pandemic = when an infectious disease spreads throughout a number of continents or the whole world “Pan” meaning “all” in Greek “-demic” from the Greek “demos” meaning “people” Examples: H 1 N 1 Epidemic = a widespread occurrence of an infectious disease in a community (one city, region or country) at a particular time “Epi” meaning “on” in Greek Endemic = regularly found among particular people or in a certain area Examples: chickenpox

PAN-, EPI-, ENDEMIC Pandemic > Epidemic > Endemic

HISTORY OF INFECTIOUS DISEASES Contagion VS. Miasmatic theory (“Miasma” = bad/night air) 10, 000 BC – 2, 000 BC Agricultural age 1578 First recorded influenza 1340 Great mortality/”Black death”/”Bubonic plague: ” 50 million dead 1918 Great flu: 50 million dead 2003 SARS: 1000 dead (spread throughout 29 countries)

CREATE A MAP OF INFECTIOUS DISEASES Tuberculosi s! Total = 24 epidemic & pandemic diseases listed by WHO Fact sheets by the WHO: http: //www. who. int/mediacentre/facts heets/ Come post on the board: 1) Picture of pathogen (its structure) 2) Origin of pathogen 3) How many reported cases in total 4) Mark on the map how many cases in countries/regions

PREVENTION OF INFECTIOUS DISEASES? Which is the most important from the list of strategies & initiative from the WHO? Google “WHO PED” and look at the brochure’s second page (http: //www. who. int/csr/disease/en/)

“INDEX CASE, PATIENT ZERO, PRIMARY CASE” First case of a condition or a syndrome: not necessarily contagious Finding Patient Zero is a painstaking detective work Using surviving patients as sources of information to backtrack