Sentence examples for are usually caused when from inspiring English sources

Clogs are usually caused when dust, moisture and micro-organisms get together in the drain tube.

Secretory otitis means fluid in the middle ear cavity without signs or symptoms of infection; this is usually caused when the Eustachian tube patency is compromised and fluid is trapped in the middle ear.

When observed, cutaneous lesions are usually caused by dissemination of MAC; primary cutaneous infections with MAC are extremely rare.

SARS deaths are usually caused by lung damage.

Vaginal and vulvar cancers are usually caused by the human papillomavirus, which also causes cervical cancer.

They are usually caused by thermal changes.

These are usually caused by kidney infections.

It is usually caused by the rapid deceleration that results when the moving chest strikes a fixed object.

It is usually caused by a bacterial infection, which can occur when the duct is blocked, such as a gallstone or tumor.

The apnea is usually caused by an obstruction of tissues in the airway that relax and shift when the patient is asleep.

When roller blinds will not completely roll up, the problem is usually caused by loose spring tension.