In the earliest stage of infection, symptoms are non-specific and may be easily confused with more common diseases, including malaria, yellow fever, and typhoid fever.

在感染的最初阶段，症状为非特异性并可容易地与包括疟疾、黄热病和伤寒在内的较常见疾病相混淆。

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But the conditions that were good for plants were also good for plant diseases, and a severe infection of yellow rust developed.

不过，良好的条件不仅对植物，还让植物病害也沾了光，于是发生了严重感染条锈病的灾情。

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In Kingston, the biggest town in Jamaica, about 20% of the white population succumbed to fatal diseases each year, mainly yellow fever.

在牙买加最大的城镇金斯敦，每年有20%的白种人死于以黄热病为主的致命疾病。

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Given its safety profile and how easy it is to make, it could quickly be tested as a potential new treatment for viral diseases ranging from dengue and yellow fever to hepatitis, say the US investigators from Georgetown University Medical Center in Washington.

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To export yellow potatoes, farmers need to deal with bugs and fungal diseases, and to produce on a larger scale.

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The wonder drug of the era was penicillin, which along with better hygiene and other treatments, thwarted diseases that only seem to ravage developing countries these days yellow fever, dysentery, typhoid, cholera, typhus, and more.

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