infestations

例句:

• The arrival of warm weather raises the specter of disease and increased rat infestations caused by rotting garbage.
  天气转暖使人们担心垃圾腐烂会引起疾病传播和鼠群猖獗.
  
• So, we have reverted to needless bedbug infestations.
  来自SA
• Piperazine citrate is the drug of choice in the treatment of Ascaris infestations.
  枸橼酸哌嗪治疗蛔虫感染是最好的药物.
  
• These pigs had acquired lungworm infestations presumably containing masked influenza virus under natural conditions.
  这些猪在自然条件下已受到含有隐蔽流感病毒的肺丝虫寄生.
  
• Large infestations can completely defoliate and eventually kill plants.
  来自BBC
• This led to a significant reduction in tapeworm infestations.
  来自SA