صفحه محصول - پاورپوینت بیماری وبا و مسمومیت های غذایی

پاورپوینت بیماری وبا و مسمومیت های غذایی (pptx) 54 اسلاید

دسته بندی : پاورپوینت

نوع فایل : PowerPoint (.pptx) ( قابل ویرایش و آماده پرینت )

تعداد اسلاید: 54 اسلاید

قسمتی از متن PowerPoint (.pptx) :

وبا تعريف : بيماري وبا يك اسهال حاد عفوني است كه عامل آن باسيل ويبريو كلرا است و اگزوتوكسين مترشحه از آن مسئول پيدايش علائم بيماري است . Cholera It is usually transmitted through faecally contaminated water or food. Incubation period is very short ( 2 hours to 5 days ) and number of cases can rise extremely quickly, especially in over-populated communities and refugee setting. Case fatality rate in untreated cases may reach 30 – 50% . Cholera: historical perspectives John Snow: identified contaminated water as the source of cholera spreading through London in 1849. Robert Koch: credited with identifying V. cholerae during the fifth pandemic in 1883. Filippo Pacini: was really the first to identify the organism in Italy in 1854. Vibrio cholera and other Vibrios Family: Vibrionaceae Genus: Vibrio Gram-negative rods Single polar flagellum Rapid linear motility Natural habitat: environmental waters Vibrio cholerae Structure is similar to the Enterobactericeae O antigen (cell surface lipopolysaccharide) H antigen (flagellar antigen) > 150 serotypes based on the O antigen 2 serotypes are associated with Cholera O1 and O139 Classification of Vibrio cholerae O1 Three main serotypes (based on somatic antigens) Inaba Ogawa Hakojima Two biotypes (based on phenotypic characteristics) Classic El Tor non-O1 Vibrio cholerae May cause an illness similar to cholera. Acquired from contaminated water or seafood. Do not cause epidemics. Of less public health importance. Clinical manifestations of cholera Abrupt onset of diarrhea without strain, tenesmus, or cramps. Spectrum of severity -- ranges from asymptomatic to a life-threatening, dehydrating diarrhea. All symptoms relate to the loss of fluid in the diarrhea.