Angiostrongyliasis: Infection with the parasitic nematode (roundworm) Angiostrongylus. The two species that infect humans are A. cantonensis and A. costaricensis.
A. cantonensis, the rat lungworm, is the most common cause of human eosinophilic meningitis (meningitis with eosinophils in the cerebrospinal fluid). The meningitis is due to the presence of the rat lungworm larvae in the brain and the patient’s local reactions to them.
A. costaricensis causes abdominal, or intestinal, angiostrongyliasis which mimics appendicitis, with eosinophilia (an increase of eosinophils in blood). There is no effective treatment for A. cantonensis or A. costaricensis.
- Angiostrongylus infection
Angiostrongylus infection: Also called angiostrongyliasis. See: Angiostrongyliasis.
Angiotensin: A family of peptides that constrict blood vessels. Narrowing the diameter of the blood vessels causes blood pressure to rise.
- Angiotensin converting enzyme 2
Angiotensin converting enzyme 2: An enzyme, abbreviated ACE2, that is an essential regulator of heart function. It may also be involved in the embryonic development of the heart. ACE2 was discovered in 2000. The gene for it has been mapped to the X chromosome (band Xp22).
- Angle-closure glaucoma
Angle-closure glaucoma: This condition can be acute or chronic. It consists of increased pressure in the front chamber (anterior chamber) of the eye due to sudden (acute) or slowly progressive (chronic) blockage of the normal circulation of fluid within the eye. The block takes place at the angle of the anterior chamber formed by its […]
- Angle-closure glaucoma, acute
Angle-closure glaucoma, acute: Increased pressure in the front chamber (anterior chamber) of the eye due to sudden (acute) blockage of the normal circulation of fluid within the eye. The block takes place at the angle of the anterior chamber formed by its junction of the cornea with the iris. This angle can be seen by […]