疱锈病是一种蔓延慢效果也慢的疾病，在树上长成黄色的锈斑。
Blisterrust is a slow-moving, slow-acting disease that appears as an orange patch on atree.
脓疱病是由一种细菌所谓的金黄色葡萄球菌，和一些株链球菌。
Impetigo is caused by a bacterium called staphylococcus aureus, and by some strains of streptococcus.
脓疱常呈白色或黄色或中央为黄色，如果混有血液则为红色。
They are usually white or yellow centrally, but may be red if they also contain blood.
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