MELS223 Lecture Notes - Microorganism, Penicillin, Disease Surveillance

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Lecture objectives: to define the terms endemic, sporadic, epidemic, pandemic and re-emerging. To discuss the lessons learned from studying three of the great pandemics. To outline the role of the who in infectious disease surveillance. Readings: brock biology of microorganisms, 13th ed. syphilis pp. 1024 1025; influenza pandemics 987 988. (12th ed. syphilis 871-873; plague 899; influenza 862-864. ) Endemic = infection is always present in the community. Sporadic = occasional cases of infection (no common source) Epidemic= sudden increase in incidence of an infection locally. Onset of winter epidemic, locally within nz. Secondary stage: rash, widespread multiplication in body: pallidum can cross placenta small microbe. Bone and cartilage gets destroyed congenital syphilis. Dominican republic: believed this is where sailors acquired syphilis. Syphilitic osseotype recognized in skeleton bones evidence of syphilis. If we go to new country, will encounter new microbes. Take them back to old country- there was no immunity to it.

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