Webster's New World Medical Dictionary

infection, ear
See also 
ear infection.
infection, group B strep
See 
streptococcus,
group B.
infection, middle ear
See 
acute otitis media.
infection, opportunistic
An infection that
grasps the opportunity to cause disease, which is
presented when a person’s immune system is weak.
These opportunistic microorganisms may be dor-
mant in the body and may cause few problems for
healthy individuals. Opportunistic infections are a
particular problem for organ transplant patients
and those with diseases that affect the immune system,
particularly AIDS. Toxoplasmosis and cytomegalovirus
are examples of opportunistic infections.
infection, pinworm
See 
pinworm infestation.
infection, primary HIV
See 
HIV infection, 
primary.
infection, rotavirus
See 
rotavirus.
infection, urinary tract
See 
urinary tract
infection.
infection, Vincent
See 
acute membranous 
gingivitis.
infectious hepatitis
See 
hepatitis A.
infectious hepatitis immunization
See 
hepa-
titis A immunization.
infectious mononucleosis
See 
mononucleosis.
inferior
In medicine, below, downward, or
toward the feet, as opposed to superior. For exam-
ple, the liver is inferior to the lungs. See also
Appendix B, “Anatomic Orientation Terms.”
infertile
Unable to conceive despite regular
intercourse without contraception. Infertility can be
due to many causes related to problems with the
male, female, or both. Many types of infertility are
treatable. Using medications or assisted reproduc-
tive tecnologies. See also 
conception; infertility.
infertility
Diminished or absent ability to con-
ceive and bear offspring. A couple is considered to
be experiencing infertility if conception has not
occurred after 12 months of sexual activity without
the use of contraception. Infertility can have many
causes and may be related to factors in the male,
female, or both. Treatments can include medica-
tions and assisted reproductive technologies.