Session 2-Intro To Microbes Flashcards
What are prions?
Proteins that generate copies of themselves
True or false: viruses can live outside the host cell
FALSE
What is the common feature of mycoplasma, chlamydiae and rickettsiae?
All rely on host biochemistry for their reproduction
How do antiviral drugs work?
Block viral cell interaction so can block life cycle and cure infection
What does Adenovirus cause?
Respiratory tract infection
What can the human papilloma virus cause?
Cervical cancer
True or false: chicken pox can reactivate to cause shingles
TRUE
How is Hep B transmitted?
IV drug use (sharing needles)
What can Hep B cause?
Hepatocellular carcinoma
What are the classifications of DNA viruses? (3)
1) single-stranded, non-enveloped
2) double-stranded, non-enveloped
3) double-stranded, enveloped
Give an example of a single-stranded, non-enveloped DNA virus
Parvovirus 19
Give an example of a double-stranded, non-enveloped DNA virus
Adenovirus
Human papilloma virus
Give an example of double-stranded, enveloped DNA virus
Herpes
Hep B
How is coxsackievirus transmitted?
Ingestion of faeces
What symptoms does norovirus cause?
Vomiting and explosive diarrhoea
What can rubella cause in pregnant women?
Heart and brain damage in the baby
What type of viruses are Ebola, Lassa and Marburg?
Haemorrhagic fever viruses
True or false: bacteria have tissue trophisms
FALSE - virus, not bacteria
What are bacteriophages?
Viruses that infect bacteria
What shape are cocci bacteria?
Circular
What shape are bacilli bacteria?
Rods
What are the two arrangements of cocci?
Clusters
Chains
What colour do gram positive bacteria stain?
Purple
What colour do gram negative bacteria stain?
Red
