按规定，医院感染按其病原体来源可分为（  ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='25756' and id < 2164316 and id<>'2164316' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25756' and id > 2164316 and id<>'2164316' order by id asc limit 5