Molecular and Diagnostic Microbiology Dr Thamarai Janganan, 2019-20
Case study 1:
A 4 year old boy came from School feeling uncomfortable on a frosty cold day. He had a
high temperature and a swollen painful itchy throat. He had difficulty swallowing food or
drink. The next day he was taken to a local surgery and the physical examination showed
pharyngeal erythema with petechia on the soft palate with white tonsillar exudate.
Identification: Streptococcus pyogenes
Case study 2
A 35 year old man presented with a chronic cough for the past two weeks. He had a low
grade fever, shortness of breath and fatigue. The patient experienced productive cough and
the sputum appears a greenish colour and was thick and tenacious.
Identification: Pseudomonas aeruginosa
Case study 3
A 27 year old women visited her doctor with the complication of vulvar itching and
white/creamy colour vaginal discharge lasting for a couple of weeks. She had no previous
history of infection. She said she recently completed a course of antibiotics for a gum
infection.
Identification: Candida albicans
Case study 4
A 40 year old man brought to an accident and emergency ward of a local NHS hospital with
severe abdominal cramping and diarrhea. He had abdominal discomfort and had 7 loose
bowel movements for the past 3 days.
Identification: Campylobacter jejuni
Case study 5
A 37 year old female was presented to a local emergency ward with the complaints of boils
on her buttocks, knees and legs with fever and chills. The patient had difficulty with walking.
The boils were tender and painful and have been spreading to other areas.
Identification: Staphylococcus aureus
Case study 6:
An 18 year boy was brought to an accident and emergency department with 14 hrs symptoms
of severe headache, chills, fever and vomiting a couple of times. He also had complaints of
agitation and confusion. After admission within a few hours he developed purpuric and
petechial rash on his legs. He had received appropriate vaccines.
Identification: Neisseria meningitidis
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