The Triassic Period. At the start of the Triassic period, 250 million years ago, the earth was just recovering from the Permian/Triassic Extinction, which witnessed the demise of over two-thirds of all land-dwelling species and a whopping 95 percent of ocean-dwelling species.
Causes. Pertussis, a respiratory illness commonly known as whooping cough, is a very contagious disease caused by a type of bacteria called Bordetella pertussis.These bacteria attach to the cilia (tiny, hair-like extensions) that line part of the upper respiratory system.auses. Pertussis, a respiratory illness commonly known as whooping cough, is a very contagious disease caused by a type of bacteria called Bordetella pertussis.
From Wikipedia, the free encyclopedia. Pertussis, also known as whooping cough or 100-day cough, is a highly contagious bacterial disease. Initially, symptoms are usually similar to those of the common cold with a runny nose, fever, and mild cough.This is then followed by weeks of severe coughing fits.ertussis, also known as whooping cough or 100-day cough, is a highly contagious bacterial disease.