它可以引起的感染，病毒，细菌或寄生虫。
It can be caused by an infection, virus, bacterium or parasite.
生物致癌物质，例如由某些病毒、细菌或寄生虫引起的感染。
Biological carcinogens, such as infections from certain viruses, bacteria or parasites.
想象一下，假如你是一只小昆虫，因为某些细菌或寄生虫侵入你的身体导致你生病了。
Imagine that you're an insect, and that you've fallen ill because some bacteria or parasites have invaded your body.
明天的疫苗有可能是极为尖端的复合物，由病毒、细菌或寄生虫基因组的原始DNA的小片段构成。
The vaccines of tomorrow are likely to be far more sophisticated concoctions, made up of snippets of raw DNA from the genome of a virus, bacterium or parasite.
即使没有找到需要杀死细菌或寄生虫，或者需要去除的气味，它将逐渐分解成两分子像增湿器的雾一样的水汽。
Even if it finds no germs to kill, or parasites to trounce, or odors to attack, it will gradually become two molecules of water which are the same as humidifier fog.
细菌，病毒，寄生虫或其他致病微生物也能以同样的方式感染的家禽和肉类可以感染鱼。
Bacteria, viruses, parasites or other disease-causing organisms also can infect fish in the same way that poultry and meat can be infected.
肌炎：肌肉组织的炎症，常为细菌、病毒或寄生虫感染所致，但有时病因不明。
Myositis: Inflammation of muscle tissue, often from bacterial, viral, or parasitic infection but sometimes of unknown origin.
寄生虫在自然选择中的作用比细菌或病毒更为重要。
Parasitic worms seemed to be a stronger driver of natural selection than viruses or bacteria.
引起炎症的病原体有细菌、病毒、霉菌或寄生虫，典型症状有尿频、尿急、尿灼痛和腰痛。
Symptoms include Burning pain during and right after urination, unusually urgent or frequent urination, and lower Back pain.
引起炎症的病原体有细菌、病毒、霉菌或寄生虫，典型症状有尿频、尿急、尿灼痛和腰痛。
Symptoms include Burning pain during and right after urination, unusually urgent or frequent urination, and lower Back pain.
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