actinic cheilitis

(redirected from A. viscosus)


inflammation of the lips.
actinic cheilitis (cheilitis acti´nica) involvement of the lips after exposure to actinic rays, with pain and swelling and development of a scaly crust on the vermilion border; it may be acute or chronic. Called also solar cheilitis. (See Atlas 3, Part E.)
angular cheilitis single or multiple fissures and cracks at the corner of the mouth on one side or both sides, which in advanced stages may spread to the lips and cheeks. Causes include primary or superimposed infection with microorganisms such as Candida albicans, staphylococci, or streptococci; poor hygiene; drooling of saliva; overclosure of the jaws in patients without teeth or with ill-fitting dentures; riboflavin deficiency; or other causes. Called also perlèche.
solar cheilitis actinic cheilitis.

so·lar chei·li·tis

mucosal atrophy with drying, crusting, and fissuring of the vermilion border of the lower lip in older fair-skinned individuals, resulting from chronic exposure to sunlight; dysplastic (premalignant) changes are noted microscopically, analogous to solar keratosis.
Synonym(s): actinic cheilitis


, chelitis, chilitis (ki-lit'is ) [ chilo- + -itis]
Inflammation or chapping of the lips, esp. at their corners. This condition may be caused by exposure to sun, wind, or other elements or it may result from habitual lip licking. Synonym: angularcheilitis

actinic cheilitis

Solar cheilitis.
Enlarge picture

angular cheilitis


solar cheilitis

Precancerous damage to the lips (primarily the lower lip) due to excessive exposure to the sun.
Synonym: actinic cheilitis

cheilitis venenata

Dermatitis of the lips resulting from chemical irritants in lipsticks, lip cream, and various other materials.

so·lar chei·li·tis

(sō'lăr kī-lī'tis)
Mucosal atrophy with drying and fissuring of the vermilion border of the lower lip in older fair-skinned people, resulting from chronic exposure to sunlight.
Synonym(s): actinic cheilitis.

actinic cheilitis (aktin´ik),

n a genus of nonmobile, gram-negative aerobic and facultatively anaerobic bacteria of the family Brucellaceae.
Actinomyces filamentous microorganisms that have been implicated in the formation of dental calculus and serve as a mode of attachment of dental calculus to the tooth surface. These microorganisms have also been found in pathologic lesions of the alveolar processes (actinomycosis).
A. israelii a normally occurring oral bacteria that aggressively causes infection (actinomycosis) when oral health is compromised.
A. naeslundii
n a specific strain of bacteria resident in open sores in the oral cavity.
A. viscosus,
n a species of
Actinomyces occurring in high numbers in the dental plaque, cemental caries, and tonsillar crypts.
References in periodicals archive ?
sanguinis (gtfP) and the sialidase gene (nanH) for targeting A.
Though more bacteria were identified by TaqMan-PCRs and especially by NGS, only the formerly investigated species A.
The comparison of NGS and TaqMan-PCRs showed higher PCR-derived genome equivalents than NGS sequencing reads, but both confirmed lower loads of A.
Colony forming units and TaqMan-PCR genome equivalents of A.
Clark of the University of Florida in Gainesville and his colleagues immunized mice with a mixture of the two types of A.