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.
Whooping cough is a highly contagious disease caused by a bacterial infection of the respiratory tract.Whooping cough, also known as pertussis, is caused by the bacterium Bordetella pertussis. The hallmark symptoms of whooping cough are violent coughing fits followed by a whooping sound made as a person gasps for air.Whooping cough is highly preventable through vaccination.hooping cough is a highly contagious disease caused by a bacterial infection of the respiratory tract.