1介水传染病是指通过饮用或接触受病 原体污染的水,或食用被这种水污染的食物 而传播的疾病,又称水性传染病。 其流行原因有二:①水源水受病原体污 染后,未经妥善处理和消毒即供居民饮用。 ②处理后的饮用水在输配水和贮水过程中 由于管道渗漏、出现负压等原因,重新被病 原体污染
1.介水传染病是指通过饮用或接触受病 原体污染的水，或食用被这种水污染的食物 而传播的疾病，又称水性传染病。 其流行原因有二：①水源水受病原体污 染后，未经妥善处理和消毒即供居民饮用。 ②处理后的饮用水在输配水和贮水过程中， 由于管道渗漏、出现负压等原因，重新被病 原体污染
介水传染病( water- born communicable disease 特点 ③水源受病原体污染后可呈爆发流行。 ②病例分布与供水范围一致。 ③一旦对污染源采取措施后,疾病能迅 速得到控制
介水传染病（water-born communicable disease） 特点： ①水源受病原体污染后可呈爆发流行。 ②病例分布与供水范围一致。 ③一旦对污染源采取措施后，疾病能迅 速得到控制
Legionella(早团菌) Sources naturally in water, multiplies in heating systems(e.g. air conditioning, cooling towers, showers) Potential health Effects Legionnaire's Disease(军团病) a type of pneumonia
Legionella (军团菌) Sources: -- naturally in water; multiplies in heating systems (e.g. air conditioning, cooling towers, showers) Potential Health Effects: -- Legionnaire‘s Disease (军团病), a type of pneumonia
Outbreak case. (1)1976 in USA, the first outbreak an outbreak of the pneumonia-like diesease in a hotel in Philadelphia infected 221 individuals and killing 34 (2)1985 in England, the second largest outbreak 101 people infected and 28 died at the Stafford hospital (3)1987, first found in Beijing infection rate: 9.9 in people who oft stay in hotel
Outbreak case: (1) 1976 in USA，the first outbreak -- an outbreak of the pneumonia-like diesease in a hotel in Philadelphia -- infected 221 individuals and killing 34 (2) 1985 in England, the second largest outbreak -- 101 people infected and 28 died at the Stafford hospital . (3) 1987, first found in Beijing -- infection rate: 9.9 % in people who oft stay in hotel
Hepatitis A Virus Outbreak case. (1)Jan- Mar 1988 in Shanghai more than 10000 cases day from Jan 30 Feb 14 jaundice(黄胆) in more than90% of cases total cases: 310746(until May 13 died cases: 31 2)1983-1989, based on analysis of hepatitis A casesreported to CDC of USA the incidence of hepatitis A increased 58%0 (from 9. 2 to 14.5 cases per 100,000 population). 7.3%/ of hepatitis A cases were associated with foodborne or waterborne outbreaks
Hepatitis A Virus Outbreak case: (1) Jan – Mar 1988 in Shanghai -- more than 10000 cases / day from Jan 30 – Feb 14 -- jaundice (黄胆) in more than 90% of cases -- total cases: 310746 (until May 13) -- died cases: 31 (2) 1983 – 1989, based on analysis of hepatitis A casesreported to CDC of USA -- the incidence of hepatitis A increased 58% (from 9.2 to 14.5 cases per 100,000 population). -- 7.3% of hepatitis A cases were associated with foodborne or waterborne outbreaks