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Collection of strains sharing a high degree of

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Collection of strains sharing a high degree of similarity in several independent traits:Most important traits include: – 70% or greater DNA–DNA hybridization and – 97% or greater 16SrRNA gene sequence identity.Current technology cannot provide an accurate estimate of the total number of prokaryotic species.
20. Why isSalmonellaTyphimurium written in this format?
Revision questions for week 5- Microbial interactions with humans1. Humans are colonised by microorganisms at birth and these colonisers are called
3. What is the difference between these 2 terms: infection & disease
Disease: Damage or injury to the host that impairs host function4. What are the factors influencing the composition of skin microflora?
5. The oral cavity is a complex and heterogeneous microbial habitat. Why?
7. What are the 2 common bacterial species in dental caries?
8. What are the factors influencing the microbial populations in the gastrointestinal tract?Examples?
10. What do we mean by LD50?
11. Attenuation is……………………………….
15. Hyaluronidase and coagulase are enzymes produced by pathogens. How do they assist ininvasion?

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