When we say that a human is a dead end host for a parasite,we mean

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When we say that a human is a dead end host for a parasite, we mean that the infected human is highly unlikely to transmit the infection to another organism. This is because the parasite may not complete its lifecycle or does not produce enough of itself in the infected human to infect another host. Therefore, the transmission chain of the parasite in the environment is broken, and humans are considered dead end hosts. This is common for many zoonotic diseases that require a vector or intermediate host to infect humans, such as Lyme disease, Rocky Mountain spotted fever, and rabies.

When We Say That a Human Is a Dead End