Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Why is infectious mononucleosis also called the “kissing disease”?

EBV
Epithelium
EBV attaches to
and infects epithelium
of the throat, where
it replicates and
causes pharyngitis.
-Lymphatic vessel
- Blood vessel
Virions enter the
lymphatic vessels and
are carried to the
lymph nodes. Some
virions escape the
lymph nodes and
are carried to the
bloodstream.
-Lymphatic
vessel
Lymph
node
Virions attach specifically
to B lymphocytes and
infect them, producing
either latent or
productive infections.
Viral genome
-Latently infected B cell
Productively
infected B cell
Productively
infected B cell
Activated
lymphocyte
Plasma
cells
Viral
%24
genome
Lysed
B cell
Effector
cytotoxic
T cell
Heterophile antibodies
T cells respond to infection
and destroy the lymphocytes
that have replicating EBV.
Latently infected B cells are not
attacked by T cells. They differen-
tiate into plasma cells and produce
random immunoglobulins,
including heterophile antibody.
FIGURE 25.7 Pathogenesis of Infectious Mononucleosis
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Transcribed Image Text:EBV Epithelium EBV attaches to and infects epithelium of the throat, where it replicates and causes pharyngitis. -Lymphatic vessel - Blood vessel Virions enter the lymphatic vessels and are carried to the lymph nodes. Some virions escape the lymph nodes and are carried to the bloodstream. -Lymphatic vessel Lymph node Virions attach specifically to B lymphocytes and infect them, producing either latent or productive infections. Viral genome -Latently infected B cell Productively infected B cell Productively infected B cell Activated lymphocyte Plasma cells Viral %24 genome Lysed B cell Effector cytotoxic T cell Heterophile antibodies T cells respond to infection and destroy the lymphocytes that have replicating EBV. Latently infected B cells are not attacked by T cells. They differen- tiate into plasma cells and produce random immunoglobulins, including heterophile antibody. FIGURE 25.7 Pathogenesis of Infectious Mononucleosis
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