Introduction To Microbes

Question 1

What are the key pathogenic organisms?

Answer 1

Virsuses, bacteria, parasites and fungi

Question 2

What are some of the key structural features of virsuses?

Answer 2

Envelope, protein cope, nucleic acid, and spikes to attaching to specific cell surfaces

Question 3

Give some examples of single stranded DNA, non enveloped viruses?

Answer 3

Ponovirsus 19 ( a fairly common childhood infection)

Question 4

Give some examples of double stranded DNA non enveloped viruses?

Answer 4

Adenovirsus, BK virsus Human papilloma virsus, (responsible for warts and in some cases can cure cancer)

Question 5

Give some examples of Double Stranded DNA enveloped viruses?

Answer 5

Herpes virsus, Hepatitis B,

Question 6

Give some examples of RNA single stranded positive strand isochedral non enveloped viruses?

Answer 6

Coxasackievirusus, echovirsus, enterovirsus, Heptatitis A and E, Norovirsus,

Question 7

Give some examples of RNA single stranded positive strand ischohedral or helical enveloped?

Answer 7

Human immunodeficency virsus, hepatitis c, rubella virsus, yellow fever virsus and a west nile virsus

Question 8

Give some examples of RNA single stranded negative strand helical enveloped virsuses

Answer 8

Ebola, Lossa, Measaels, Mumps, influenza, parainfluenza,

Question 9

Give an example of a RNA double stranded isochedral non enveloped virsus?

Answer 9

Rotavirsus

Question 10

What are bacteriophages most commonly assoicated with?

Answer 10

DNA transfer between organisms

Question 11

What are some of the structural features of a bacteria?

Answer 11

Capulse, Ribsomes, flagella, cell wall, plasma membrane, cytoplasm, plasmids (can transfer antibiotic resistance) Pilli

Question 12

What are the common shapes of bacteria?

Answer 12

Coccus (plural cocci), Sprillus and bacillus (also known as rods)

Question 13

What is the difference between gram negative and gram positive bacteria?

Answer 13

Gram postive has a thick peptidoglycan cell wall, and gram negative generally has a lipopolysaccharide cell membrane

Question 14

Give some examples of gram postive cocci?

Answer 14

Staph aureus, coagulase negative staph, alpha heamolytic streptocossi, beta heamolytic strepocooci included stephpyognes, and stretpotcoccus penumoniae.

Question 15

Give some examples of Gram negative cocci

Answer 15

Neissera menningitis, Neissera ghnorrae, moraxella contrallansa,

Question 16

give some examples of gram postive bacilli?

Answer 16

Listera moncytogenes, bacillicus antracis, and bacillus aureus.

Question 17

Give some examples of gram negative bacilli?

Answer 17

Eschedria coli, Klebsiella pneunomae, proteus species, salmonella lyphi, pseudomonas argus, heamophillus influenzae

Question 18

What are some of the factors affecting the virulence of bacterial pathogens?

Answer 18

Host entry (eg polysacchride capulse), adhernce to host cells, (pilli and fimbrae) invasiveness (enzymes such as collagenase) Iron sequestration

Question 19

give some examples of single celled fungi.

Answer 19

Candida albicans, cyrtococcus, pneumonary lysis, and the moulds such as aspergillus

Question 20

What are some examples of helmiths (worms)

Answer 20

Round worms, tape worms, flukes.