Pathogens Flashcards
What is a microorganism?
A microscopic organism
What is microbiology?
Branch of science
What is a pathogen?
Induces infectious diseases
What sorts of pathogens exist?
Bacteria, virus, fungi, prions, protozoa, endoparasites, ectoparasites
What are bacterias characteristics?
Unicellular, prokaryotic, 0.5-5 um, shape differentation
What is virulence?
The degree of pathogenicity, capacity to cause disease,
What is a cell walls structure?
Peptidogylcan, murein
What colour is gram positive and gram negative?
Purple and Pink
What is the microbacterium?
Acid fast, M tuberculosis, M bovis,
What are endotoxins?
Outer membrane of gram negative, creates toxicity, released during cell growth, causes damage to host, destroys health
What are pili and fimbriae?
Short hair on surface, bacteria have two pili (conjugation or attachment)
What are conjugation pilli?
DNA transferred gives genetic variability to host, antibiotic resistance is transmitted
What are attachment pilli?
Contribute to pathogencity, facilitating colonisation,
What is glycocalyx?
Capsule - protective structure
Slime layer - 11, thinner
Other pathogenic properties?
Endospores - dormant, resistant to hostile physical and chemical conditions, destroying them very difficult,