virus

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biotechnology

ATTILIO RAPACCIOLI

Italy

#	Jeux	Précision	temps
1	ATTILIO RAPACCIOLI 4 Novembre 2016	% 74	05:00

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Compléter virusVersion en ligne biotechnology par ATTILIO RAPACCIOLI 1 others range outbreaks harmless Other abundant case viruses viruses Viruses are by far the most biological entities on Earth and they outnumber all the put together . They infect all types of cellular life including animals , plants , bacteria and fungi . However , different types of can infect only a limited range of hosts and many are species - specific . Some , such as smallpox virus for example , can infect only one species in this humans , and are said to have a narrow host range . viruses , such as rabies virus , can infect different species of mammals and are said to have a broad range . The that infect plants are harmless to animals , and most viruses that infect other animals are to humans . The host of some bacteriophages is limited to a single strain of bacteria and they can be used to trace the source of of infections by a method called phage typing .