Legionnaire Disease Case Study

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PHPC 3015 Critical review of prevention and control programmes of Legionnaire disease in Hong Kong Name: Wong Chui Hei SID: 1155062441 Introduction Legionnaire’s Disease has been one of the major pneumonia cases in Hong Kong. Most cases occurred are due to the infectious agent Legionella serogroup 1 bacteria. The patients will first develop chills, headache, fever, muscle pain and may appear other symptoms later, including cough, which may bring up mucus and sometimes blood, chest pain, shortness of breath and gastrointestinal symptoms, such as vomiting and diarrhea. (1) There are mainly three types of outbreaks, including nosocomial, community-acquired and travel-associated outbreak. Institutional/nosocomial outbreak risk of hospital’s water system can pose a great threat to the patients and front-line health care workers. Community-acquired outbreak often occur when the contaminated droplets and mist generated by the water system is breathed, while travel-associated outbreak has a disperse of sources due to the nature of travel. (2) In Hong Kong and other developed countries, legionella bacteria is prevalent due to the use of modern architecture like cooling tower and humidifier, which is breeding site for such bacteria to grow and multiply, as well as the increasing frequency of global travel. There had been a trend in increasing the local prevalence rate of the disease. (Table 1) This paper will review the current prevention and control policy and benchmark with the

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