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.
Symptoms and Causative Agent. Pertussis, also known as whooping cough, is an extremely contagious disease caused by the Bordetella pertussis bacterium. These bacteria produce toxins that paralyze parts of respiratory cells, leading to inflammation in the respiratory tract.elgian scientists Jules Bordet (1870-1961) and Octave Gengou (1875-1957) isolated the bacterium Bordetella pertussis, the causative agent of pertussis (whooping cough), which they had first observed in 1900. It would later also come to be known as the Bordet-Gengou bacillus.