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Legionella Legionellae are present in aquatic environments Their growth isextensive in warm water and soil Legionellae are present in 43 or moreforms Out of their total species about half is linked to humandisease Some Legionellae exist in multiple serogroups and more thansixty serogroups have so far been identified Legionella pneumophila isa causative species These are usually present in non-spore forming andgram negative conditions The structure of this bacteria is usuallyrod-shaped with flagellated properties According to an estimate around8000-18000 individuals in USA get Legionellosis annually with twodistinctive disease forms - Legionnaires disease and PontiacfeverHistory of Pontiac FeverPontiac fever was the first discovery of scientists It was initiallyfound to be present in individuals immediately after one of the majoroutbreaks of Pontiac Michigan in the year 1968 According to anestimate ninety five workers of Oakland County Health Department out ofhundred and fifty out of one hundred and seventy visitors became thevictims CDC took steps to control the situations by sending a team ofinvestigators to Oakland County Health Department building The threeinvestigatory individuals also got sick but the investigations did notstop Finally CDC concluded that the outbreaks were stemming from anevaporation condenser This condenser was present in the basement of thebuilding It was brought to the roof and Legionellae were pushed back tothe buildingHistory of Legionnaires diseaseLegionellosis disease refers to a type of pneumonia usually caused bybacteria The bacteria got its name after an outbreak that took place in1976 This is when some of the people who had attended a convention inPhiladelphia suffered from Legionnaires disease Legionella nd Thescientists and experts concluded that it is Legionella bacteria whichwas causing the disease to occur and spreads for many years Thereforethey concluded that Legionnaires disease is not a new disease but waspresent from the times of 1976 But in those days it was not studiedand recognized for its origin and occurrence Between 1996 and 2000 39of reported Legionnaires disease outbreaks occurred in Philadelphiaand other vacation settings and national
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