snoopy9438
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Dołączył: 14 Lut 2011
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 Wysłany: Czw 19:23, 31 Mar 2011 Temat postu: christian louboutin anemone feather pumps silent+s |
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d early in the year 1949 declared that the arsenic-resistant ticks could be controlled readily with the new chemical; later in the same year, a bleak notice of developing resistance had to be published. The situation prompted a writer in the Leather Trades Review to comment in 1950: ‘News such as this quietly trickling through scientific circles and appearing in small sections of the overseas press is enough to make headlines as big as those concerning the new atomic bomb if only the significance of the matter were properly understood.’
Although insect resistance is a matter of concern in agriculture and forestry, it is in the field of public health that the most serious apprehensions have been felt. The relation between various insects and many diseases of man is an ancient one. Mosquitoes of the genus Anopheles may inject into the human bloodstream the single-celled organism of malaria. Other mosquitoes transmit yellow fever. Still others carry encephalitis. The housefly [link widoczny dla zalogowanych], which does not bite, nevertheless by contact may contaminate human food with the bacillus of dysentery, and in many parts of the world may play an important part in the transmission of eye diseases. The list of diseases and their insect carriers [link widoczny dla zalogowanych], or vectors [link widoczny dla zalogowanych], includes typhus and b
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[link widoczny dla zalogowanych]
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