Monday, December 3, 2007

 
MMIC PBL 1 (Case 6)
Name: Ong Fei Fei
Sex: Female
Age: 37 years old
IC NO: S210334X
Location: Clinic T (Outpatient)


Clinical Diagnosis: Urinary Tract Infection (UTI)
Antibiotic Treatment: Nil
Signs and Symptoms: Fever, pain during urination, virginal discharge
Specimen Type: Virginal Discharge


Bacteria first travel to the urethra. An infection occur when the bacteria multiply. When infection is limited only to the urethra, the infection is known as urethritis. If bacteria move to the lower urinary tract (bladder), an infection, called cystitis, results. If the infection is not treated promptly, bacteria may spread to the upper tract and multiply. This infects the kidneys causing infection known as pyelonephritis.

From the clinical diagnosis, I have short listed the possible bacteria causing UTI:

- Staphylococcus saprophyticus
§ Inhabits the skin surrounding the genitourinary tract
§ Particularly in sexually active young women
§ Second most common cause
§ Spherical gram positive cocci arranged in irregular grapelike cluster
§ Coagulase negative

- Escherichia coli
§ Major cause of UTI; Normal flora of the vagina and anterior urethra
§ Falcutative anaerobe
§ Gram-negative rod
§ Lactose fermenting
§ motile

- Pseudomonas aeruginosa
§ Inhabits the colon
§ Transmission is via fecal contamination
§ Gram negative rod
§ Non- lactose fermenting
§ Aerobic
§ Oxidase positive
§ Blue-green pigment (pyocyanin)

- Enterococcus faecalis
§ Habitat is the human colon; urethra and female genital tract can be colonized.
§ Gram-positive cocci in chains
§ Catalase negative
§
- Enterobacter-Klebsiella-Serrtia Family
§ Habitat is the human enteric tracts
§ Transmitted to the lungs by aspiration by ascending spread of fecal flora
§ Gram- negative rod
§ Lactose fermenting

-
Proteus-Providencia-Morganella Family
§ Habitat is the human colon
§ Transmission to urinary tract is by ascending spread of fecal flora
§ Gram- negative rod
§ Produce urease
§ Highly motile
§ Non-lactose fermenting
§ Produce H2S
§ Indole positive

In my next blog entry, I will write about the investigation required to identify the bacteria.




References
http://adam.about.com>search: urinary tract infection

Levinson, W. (2006). Review of Medical Microbiology & Immunology. San Francisco, California: Lange Medical Books/McGraw-Hill publishing company

Loh Mun Jo-anne
TG02
0503324F


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