The source of infection was undetermined.
感染源尚未确定。
The uncle’s source of infection is under investigation.
正在对舅舅的感染源进行调查。
Investigations into the source of infection are underway.
正在进行感染源调查。
Patients of measles are the only source of infection.
麻疹病人是唯一的传染源。
The source of infection for all three cases is still under investigation.
目前仍在对三例病例的感染源进行调查。
The source of infection for this newly confirmed case remains unclear.
这名最新确诊病例的感染源目前仍不清楚。
As in Asia, contact with infected birds is the principal source of infection.
如同在亚洲一样，接触受感染的禽鸟是主要感染源。
Health care staff working while sick are an obvious source of infection.
医院的工作人员在生病时工作是明显的传染源。
The likely source of infection for the additional cases has not yet been determined.
尚未确定其它病例的可能感染源。
Feeding of uncooked table scraps on the farm is a source of infection in small herds.
在牧场中喂饲未煮熟的厨房废肉是小猪群的一个传染来源。
The source of infection for the two brothers remains undetermined and investigations are ongoing.
这兄弟俩的感染源仍未确定，调查正在进行之中。
There is no evidence that properly cooked poultry or poultry products can be a source of infection.
没有证据表明经妥善烹煮的家禽或家禽制品可成为感染源。
The investigation into the source of infection indicate that the case had exposure to sick poultry.
感染源调查显示，病人曾与病禽有过接触。
Investigations into the source of infection indicated that the case had exposure to sick and dead poultry.
感染源调查显示，该病人与病死禽有过接触。
Investigations into the source of infection indicated that both cases had exposure to sick and dead poultry.
感染源调查显示，两位病例均与病死禽有过接触。
These exposures are, at present, thought to be the source of infection for most confirmed or suspected cases.
目前据认为，这些接触是大多数确诊或疑似病例的感染源。
Investigations into the source of infection indicate that the both cases had exposure to sick and dead poultry.
感染源调查显示，两位病人都与怀疑患有禽流感的家禽有过接触。
Investigations into the source of infection indicated that all four cases had exposure to sick and dead poultry.
感染源调查显示，四位病人都曾与病死禽有过接触。
Investigations into the source of infection indicated that the five cases had exposure to sick and dead poultry.
感染源调查显示，五位病例均与病死禽有过接触。
Although it is impossible to eradicate the source of infection, it is possible to reduce the risks substantially.
虽然不可能根除感染源，但可以显著减少风险。
The father was closely involved in caring for his son, and this contact is considered a possible source of infection.
这位父亲密切参与照顾其儿子，并且这名接触者被认为是可能的感染源。
In all such reports, eating raw infected poultry was considered the most likely source of infection for the cats.
在所有此类报告中，食用受感染的生家禽据认为是猫最有可能的传染源。
Investigations into the source of infection indicated close contact with dead and sick poultry prior to becoming ill.
感染源调查显示发病前曾与病死家禽密切接触。
Epidemiological investigations uncovered exposure to infected poultry as the likely source of infection in both cases.
流行病学调查揭示接触受感染家禽为这两例的可能感染源。
Investigations into the source of infection indicated that all the above cases had close contact with dead and sick poultry.
感染源调查显示，上述所有病例均与病禽和死禽有过密切接触。
Investigations into the source of infection indicated that the above two cases had close contact with dead and sick poultry.
感染源调查显示，上述两个病例均与病禽和死禽有过密切接触。
Investigations into the source of infection indicate that the case had exposure to poultry suspected to have avian influenza.
感染源调查显示，该病人与怀疑患有禽流感的病禽有过接触。
Samples from these birds have been taken and are undergoing tests to determine whether they may have been the source of infection.
已从这些禽类采集样本并正在进行检测以确定它们是否可能是感染源。
Investigations into the source of infection indicate that the two cases had exposure to poultry suspected to have avian influenza.
感染源调查显示，两位病人都与怀疑患有禽流感的家禽有过接触。
Investigations into the source of infection indicate that the two cases had exposure to poultry suspected to have avian influenza.
感染源调查显示，两位病人都与怀疑患有禽流感的家禽有过接触。
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