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SCNM Q3 Microbiology Final ExamWith Verified Solution 2024
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SCNM Q3 Microbiology Final ExamWith Verified Solution 2024
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SCNM Q3 Microbiology Final ExamWithVerified Solution 2024
Haemophilus ducreyi (it's so painful, you do cry ) - ans-Genital ulcerations characterized by
painful sores on the genitalia (Chancroid)
-Syphilis - non-painful
-sexual transmission
-Chancroid starts as erythematous papular lesion that breaks down into a painful bleeding ulcer
with a necrotic base and ragged edge
Haemophilus Influenze (Acute Bacterial Meningitis) - ansGram - coccobacilli; **Requires
Capsule for virulence
-normal flora, 75% pop carriers (non-capsule form)
-Colonize nasopharynx - penetrate epithelium - bacterial meningitis
-begins w/URI (runny nose/ear infection)
***Otitis Media - up to 20% who recover have permanent hearing loss
-headache, stiff neck, epiglottitis - to point of choking, drooling, sore throat
-Pneumonia (thought to be flu infection)
,-Spread- direct contact, secretions, aerosol
-DDX bacteria in blood/CSF (growth, antigen test of PCR)
***Requires hemin (factor X) + NAD+ (factor V) for growth (NAD from blood cells, Heme
from lyes blood cells - choc agar for growth)
**Vaccine = polysaccharide only (HIB vaccine Type B)*****
Gardnerella Vaginalis (previously Haemophilus) - ans-normal flora of vagina (50% women)
-overgrowth related to change in normal flora (loss of Lactobacillus)
****Main symptom: unusual vaginal discharge (white/gray) w/fish-like
odor -increased after sexual intercourse or during menstruation
Acinetobacter baumannii - ansGram-negative rod
Pneumonia or bloodstream infections,
especially in critically ill patients on mechanical ventilation.
Nosocomial skin and wound infections, bacteremia, and meningitis
Can survive on the human skin or dry surfaces for weeks, and is resistant to a variety
of disinfectants, making it particularly easy to spread in a hospital setting
Resistance against broad-spectrum cephalosporins, β-lactam antibiotics, aminoglycosides, and
quinolones
Helicobacter Pylori (H. Pylori) - ans•H. Pylori - most well known for having flagella
, •Most unique for infecting stomach environment - flagella penetrates the epithelial lining -
produces an enzyme "UREASE" - converts urea from the stomach to produce = Ammonia
+ CO2
•Ammonia is toxic to cells = leads to epithelium damage
•THE CAUSE of PEPTIC ULCERS, Gastric Carcinomas - due the bacteria constantly
irritating/ building a constant inflammatory response = cancer
•Treatment MUST BE A 2-STEP PROCESS
•Need something to neutralize the acidic environment (ex. PPI, Omeprazole) - before
antibiotics to work:
Then can add in Antibiotic for action
Campylobacter Jejuni - ans•Campylobacter Jejuni àMost common cause of DIARRHEA!!!
•Caused from
•**Poultry
•Raw milk
•S&S
•Watery diarrhea, cramps
•Short-term
•Only need 500 cells to cause infection (don't need much to cause bacteria) - about ½ of ALL
poultry/juice contain Campylobacter Jejuni ---1 drop of turkey juice is enough to be infectious
•
•Guillain-Barre Syndrome -
•Ascending Paralysis - AI disease - dependent upon location of the bacteria and where
the immune system starts producing antibodies that attack the nerves/nervous system
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