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.
B. pertussis and B. parapertussis are very similar species. Both species cause pertussis (whooping cough) in humans and are separated merely by the toxins they release during infection. B. parapertussis releases toxins that seem to cause a milder form of pertussis (whooping cough). B. bronchiseptica causes respiratory disease in various mammals and occasionally in humans. The species is further separated from B. pertussis and B. parapertussis by being motile.