根据病原体感染的次数、时间先后和种数，感染可分为四种，不包括

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30590' and id < 2468225 and id<>'2468225' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30590' and id > 2468225 and id<>'2468225' order by id asc limit 5