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Infection & Immunology Flashcards

(17 cards)

1
Q

Can viruses synthesize their own energy or proteins?

A

No, they are dependent on the host cell

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2
Q

What are the three features that help classify a virus?

A
  1. Presence or viral nuclei acid- DNA or RNA, capsid size and presence of envelope
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3
Q

What does the HPV do the host?

A

Malignant transformation caused by unrestrained growth, prolonged survival and morphological changes of the cell

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4
Q

Describe the structure of the virus

A

Look at notebook

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5
Q

Compare the size of the smallest bacteria and largest bacteria

A

Smalles bacteria- similar in size to the largest virus and largest bacteria similar in size to RBC

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6
Q

Name two bacteria that cannot metabolise and grow themselves

A

Chlamydia and rickettsia

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7
Q

Describe the structure of bacteria

A

Look at notebook

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8
Q

Difference in the cell wall between gram negative and gram positive bacteria

A

Gram negative - thin peptidoglycan layer surrounded by an outer lipid membrane. The periplasmic space of gram negatives may contain B lactamase which degraded antibiotics such as penicillin.

Gram positive - just have a thick peptidoglycan wall ad no outer membrane

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9
Q

What element of the gram negative and gram positive bacteria cause septic shock?

A

Gram negative- endotoxin- lipopolysaccharide in their outer lipid membrane can cause shock

Teichoic acid only found in gram positive can cause septic shock

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10
Q

Name four organisms that have a polysaccharide capsule helping them avoid phagocytosis

A

Strep pneumoniae, Neisseria meningitidess, Klebsiella pneumoniae, and E.coli

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11
Q

Which is the most dangerous serotype of Haemophillus influenza?

A

Haemophilus influenza type B

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12
Q

What color does gram negative and positive stain?

A

Gram negative - pink/red
Gram positive - blue/purple because the dye is retained in the thick cell wall

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13
Q

Name three classes of eukaryotes

A

Fungi, protozoa and helminths

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14
Q

Name two spore forming protazoa

A

Plasmodiu, toxoplasma gondii

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15
Q

Name two flagellate protozoa

A

Giardia intestinalis, trichomonas

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16
Q

Name two amoeboid protazoa

A

entamoeba histolytica- causes liver abscess or amoebic dysentry

17
Q

What are amoeboid protozoa?

A

They have pseudopods for locomotion and feeding