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  the placenta or enter the mammary glands (examples of vertical transmission); while some species will utilise  
 
  the placenta or enter the mammary glands (examples of vertical transmission); while some species will utilise  
 
  paratenic or intermediate hosts.
 
  paratenic or intermediate hosts.
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  −
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[[Ascaridida]]
 
[[Ascaridida]]
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