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Micro 1
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Usual first encounter w / microorganisms
Birth
Common diseases transmitted to fetus through placenta (congenital
infections)
Rubella (German measles)
Syphilis
Diseases caused by HIV or
CMV
Immunological protection from mother
Antibodies from her circulation and milk
Exogenously acquired diseases
Exogenously acquired diseases
Endogenously acquired diseases
Caused by agents of normal microbial flora (usually when they penetrate
into deeper tissues)
Colonization
Presence of microorganisms (may or may not lead to damage/disease)
Distinguishing between exogenous and endogenous difficult. Why?
“Normal flora” varies between individuals, as does response to agents
Ingress vs. Penetration
Ingress
: entry into body cavities contiguous with outside
environment
Penetration
: entry into
deeper tissues after crossing epithelial barrier
Defenses against infection via inhalation
Anatomic structures (nasal turbinates, oropharynx, larynx)
Upward-sweeping ciliary
epithelium
Defenses against infection via
ingestion
Stomach acid (varies based on type/amount of food ingested), pancreatic
enzymes, bile salts, peristalsis action
Part of S.I. more favorable to bacterial life
Ileum
Cell-mediated entry
Occurs when macrophages containing microorganisms reenter body and carry microorganisms
to deeper locations (e.g. HIV)
Author
gatorali
ID
29044
Card Set
Micro 1
Description
Chapter 1 Microbiology Quiz
Updated
2010-08-05T15:29:41Z
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