Case study

Discussion/Case
Study 1
the steps above. Note: You must make your initial
post before seeing your classmates’ posts.
CON
Case Study A
An 18-month-old male has been brought to the
emergency department with high fever, shortness of
breath, and cough. The chid had been healthy until he
was six months old. Since then, he has had four ear
infections. He has been on antibiotics for several
months because of the severity and recurrence of ear
infections. He was recently taken off antibiotics. The
boy’s blood culture reveals the presence
of Streptococcus pneumoniae. Immunologic testing
shows depressed levels of IgG, IgM and IgA antibodies
in the serum. Flow cytometry results indicate an
absence of circulating B lymphocytes.
(Adapted from case study by Gary Hammer, MD, PhD; Stephen J.
McPhee, MD; Yeong Kwok, MD)
1. What is the likely diagnosis for this patient and
why?
2. Why was the child generally healthy until 6
months of age?
Case Study B
Mr. Landon a 38-year-old male, who lives in the United
States was infected with SARS-CoV-2 in August of 2021
while working out-of-town within the continental USA.
His symptoms were fortunately mild, and he recovered
without any medical intervention at that location before
returning home to his family. He was unvaccinated for
Covid at the time. None of his family members were
exposed to Covid during his illness. Mr. and Mrs.
Landon got their Covid shots in early November along
with their 7-year-old son, Robert. Mrs. Landon does
daily Covid tests to go to work and has never tested
positive in 2021. In January of 2022 Robert developed