Hydrocarbons are non-polar. Water is polar. So from âlike dissolves likeâ you wouldnât expect any of these three to be very soluble in water. In fact, unsaturated and aromatic hydrocarbons are slightly soluble in water- the solubility of toluene in water is ~500mg/L â not very much. Cyclohexene is even less than that.
Pertussis, or whooping cough, is a highly contagious disease involving the respiratory tract. It is caused by a bacterium, Bordetella pertussis, which is found in the mouth, nose and throat of an infected person. person can transmit pertussis from seven days following exposure to an infected person, to three weeks after the onset of coughing episodes. Pertussis is only contagious for 5-7 days if antibiotic therapy is begun.
Introduction. Bordetella pertussis was first isolated in pure culture in 1906 by Bordet and Gengou. Today, B pertussis belongs to the genus Bordetella in the family Alcaligenaceae, which contains several species of closely related bacteria with similar morphology. pertussis and B parapertussis cause whooping cough (pertussis) in humans. Other members of the genus are B bronchiseptica, which causes respiratory disease in various animals and is only occasionally found in humans.