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Microbiology > Chapter 20 : Gram negative bacteria > Flashcards

Chapter 20 : Gram negative bacteria Flashcards

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Biology 101 flashcards
1
Q

What are two important featuresthe bacteria about Neisseria (not its pathology)

A

They are cocci, usually diplocooci. They are oxidase positive

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2
Q

What is the value of the oxidase positive test for Neisseria?

A

It distinguishes them form the rGram negative pathogens

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3
Q

What are the two species of pathogenic Neisseria?

A

Neisseria Gonorrhoeae and Neisseria meninigitis

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4
Q

What are important symptoms of Gonarroea in men? Women? Babies?

A

Men: Pussy discharge
Women: Pelvic inflamatory disease: can cause sterility
Babies: Eye infection, inflation of the conductive. Ophthalmia neonate

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5
Q

What are features of Neisseria Gonorrea that contribute to its virulence?

A

Fimbriae and Capsules

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6
Q

What are the three most common meningitis causes bacteria?

A

Streptococcus pneumoniae
Neisseria meningititis
Haemophilus influenzae

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7
Q

What is the most common cause of meningitis in people under 20?

A

Neisseria meningitidis

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8
Q

What is a symptom of meningoccal septicemia?

A

Petechiae. It cause purple lesson and necrosis. It is the result of capillaries bursting.

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9
Q

What component of Gram negative bacteria are often responsible for their pathoginitciy?

A

Lipid A. It is an endotoxin.

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10
Q

…

A

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11
Q

….

A

…

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12
Q

Which bacteria on our pathogens list are cloakrooms?

A

E. coli. Klebsiella, Serratia, (common but not on list enterobacter and ctirobacter)

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13
Q

What types of E. coli tend to be pathenogentic?

A

ETEC (Entertoxigenic E. coli)
Enterohemorriagic E. coli
Uropathonogenic e. Eoli (cause UTIS)

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14
Q

Descrie EHEC. What is its designation? How is it transmitted? What are kind of toxin does it have?

A

It is called E. coli 0157:H7
Ground beef, unpasteurized milk or fruit juice, produce.
It produces shingles like toxin.

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15
Q

What disease is cause by ETEC?

A

Gastroenteritits/ Traveler’s diarrhea

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16
Q

What disease are cause by EHEC (E. Coil 0157:H7)?

A

Hemorrhagic colitis, Kidney disorder (Hemolyitic uremic sydrome).

17
Q

What aids in Klebsiella’s proliferation in the body? How you describe it’s pathogenicity?

A

Muccoid Capsules that help evade phagocytosis. It is an oppotunitic pathogen.

18
Q

What diseases are can be cause by Klebsiella pneumonia?

A

Menigitisits, pnemonia, bacteremia, UTIs

19
Q

Which enterbactericae can also be native microbiota?

A

Klebisella, E. Coli

20
Q

How is Serrate most commonly acquired? By whom? What are trouble with treating it?

A

It is often by catheters and other hospital equipment. By immune compromised patentees. It is very resistant to antimicrobial drugs

21
Q

Which two bacteria are associated with catheter? Which is most associated with long term use?

A

Serratia and Proteus mirabillis. P. mirabillis is most associated with long term catheter use.

22
Q

Decirbe importnat info about Proteus.

A

Non coliform opportunistic enterbacteriaceae. Infections from catheters. Causes kidneys stone by raises pH from urease.

23
Q

What are the truly pathogenic enteric bacteria?

A

Samonella typhimurium, Salmonella typhi, Shigella

24
Q

What are the 4 gram negative bacilli or cocci bacilli the are not enteric covered in this class?

A

Hemophilis influenzae (does not cause flu), Bordetella pertussis, pseudomonas aeruginosa, Legionella pnemophila

25
Q

What cause the plaque? What types are there How are they spread? What kind of bacteria is this?

A

Yersinia pestis. Bubonic, by fleas on rodents, pneumonic airborne person to person. The are loosly relate enteric bacteria.

26
Q

How does salmonellosis work?

A

Salmonella attaches to the epithelial cells and trigger endocytosis. Multiples in endocytic vesicleIt kill hosts cell and endotoxins induce fever cramps, diarrhea, can get into the bloodstream.

27
Q

Shigella is basically e. coli with bloody stool.. What toxin does it produce?

A

Shiga toxin.

28
Q

What is the mechanism of shigellosis?

A

attaches to epithelial cells. Trigger endocytosis, multiplies in cytosol. Directly invades neighboring cells, avoiding the immunities system, Absecess form. No Bacteremia. Death from dared and dehydration.

29
Q

What is the main disease cause by Haemophilus influenza? how has it’s transmission been reduced?

A

Meningitis. HIB vaccine.

30
Q

Which gram negative bacillus has capsules?

A

Hemophilis influenzae (does not cause flu),

Microbiology (10 decks)

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