Definitions are based on the 2006 CDNA–Guidelines for the public health management of trachoma in Australia.1
The presence of chronic inflammation of the conjunctiva caused by infection with Chlamydia trachomatis; includes World Health Organization grades trachomatous inflammation ‑ follicular (TF) and trachomatous inflammation ‑ intense (TI).
At risk communities:
Communities classified by jurisdictions as being at higher risk of trachoma (generally based on prevalence above 5% in age group 5–9 years).
Absence of dirt, dust and crusting on cheeks and forehead.
Community screening coverage:
The number of communities screened for trachoma as a proportion of communities designated by jurisdictions to be at risk of trachoma.
Includes all members of the household or households in which a person with active trachoma regularly sleeps. However, where the community prevalence was greater than 10%, this term includes all members of the community, not only household members.
Prevalence of active trachoma of 5% or more in children aged 1‑9 years or a prevalence of trichiasis of at least 0.1% in the adult population.
Prevalence of active trachoma of 20% or more in children aged 1‑9 years.
Prevalence of active trachoma:
Proportion of people found in a screening program to have active trachoma.
The proportion of people in a population examined for trachoma or trichiasis through a screening program.
Trachomatous inflammation–follicular (TF):
Presence of five or more follicles in the upper tarsal conjunctiva, each at least 0.5 mm in diameter, as observed through a loupe.
Trachomatous inflammation–intense (TI):
Pronounced inflammatory thickening of the tarsal conjunctiva that obscures more than half of the normal deep tarsal vessels.
Trachomatous trichiasis (TT):
Evidence of the recent removal of in–turned eyelashes or at least one eyelash rubbing on the eyeball.
The proportion of people requiring treatment for trachoma under guidelines who actually received treatment.