Lecture 9 Flashcards Preview

Microbiology > Lecture 9 > Flashcards

Flashcards in Lecture 9 Deck (62)
Loading flashcards...
1

Pathogens that produce disease both inside and outside the GIT

E.coli and Salmonella

2

Pathogens that cause disease only inside GIT

Shigella,Vibrio, Campyobacter, H pylori

3

Pathogens present in GIT but cause disease only outside

Kebsiella group, Pseudomonas, Bacteroids

4

G- rods belong to what family?

enterobacteriacea- primarily in colon of humans and animals as normal flora

5

Do gram - rods rely on oxygen?

all are facultative anaerobes except pseudomonas which is an obligate aerobe

6

What do Gram - rods have on their cell wall?

Endotoxin

7

What does E.coli cause?

Urinary trac infections, travelers diarrhea and neonatal sepsis

8

Where is E.coli normal flora found?

in colon and feces

9

How do Gram - move?

move with single flagellum and plenty of pili

10

Pathogenicity of E.coli

adheres to mucous membranes of jejunum and ilium by pili causes intestinal, systemic and urinary infections- some strains cause watery diarrhea and some cause bloody diarrhea

11

What is the most frequent nasocomial infection?

UTI- due to indwelling catheters

12

What other type of infection can E.coli cause from UTI?

infection of bladder known as cystitis- pyelonephritis can occur if infection goes further up

13

Symptoms of bladder infections

frequent urination along with feeling of need to urinate, nocturne, pain in pubic area, hematuria

14

Symptoms of Urethritis

discomfort, irritation or pain at urethral meatus or burning sensation on urination, pyuria, pyrexia, cloudy and foul urine

15

Symptoms of kidney infection

symptoms from urethritis as well as emesis, back/side pain, abdominal pain, high spiking fever, night sweats and fatigue

16

What E.coli looks like on a lab diagnosis when serious infection

pink colony- ferments lactose
urine examination shows pus cells

17

What is travelers diarrhea due to?

drinking water that has been contaminated by sewage

18

What is neonatal sepsis due to?

presence of E.coli in vagina of pregnant women

19

Treatment for GIT infection

no treatment, self-limiting, supplemental fluid may be necessary

20

Treatment for UTI infection

Oral trimethoprim and sulphamethoxazole/cephalosprin and amino glycoside

21

presence of what organism in drinking water is indicative of sewage contamination?

coliform organism

22

What can be done to remove coliform organisms from water?

chlorination of water

23

gram - rod that causes typhoid fever

Salmonella-- only through ingestion

24

How does salmonella move?

has a ton of flagellum

25

typhoidal species

S.Typhi and S.Paratyphi are fever producing

26

non typhoidal species

diarrhea producing- Salm. Typhi murium is most common cause of diarrhea in US

27

Mode of transmission of salmonella

ingestion of food and water contaminated with human or animal waste

28

Is there an animal source of transmission for S. Typhi?

No- only human

29

So typhoid fever is mainly due to...?

water contamination with fecal materials- not animal source

30

Symptoms of typhoid fever

severe fever for 3 to 4 weeks, constipation, leukopenia, delirium, tender abdomen, enlarged spleen, rose spots