Menstruation, periodic discharge from the vagina of blood, secretions, and disintegrating mucous membrane that had lined the uterus. 1  The biological significance of the process in humans can best be explained by reference to the reproductive function in other mammals.
Chlamydial (kla-MID-ee-al) infections are caused by three species of microorganisms. Chlamydia trachomatis can cause eye or lung infections and can also infect the urinary and genital areas of both men and women. Chlamydia pneumoniae causes infections of the respiratory tract, and Chlamydia psittaci causes an illness, known as parrot fever, that is similar to the flu.
â¢Psittacosis is a lower respiratory disease caused by Chlamydia psittaci. -Symptoms include fever, headache, and dry cough. -Humans acquire the disease by inhaling contaminated dust or dried droppings from infected birds (parrots, canaries, parakeets). -Tetracycline antibiotic therapy is effective.