أسئلة ريتين الأولى بارا دمياط (قبل التعديل)

A parasite is an organism that lives in or on another organism (host) and obtains food at the expense of the host.

This organism is called a facultative parasite.

Infestation refers to parasites living outside the body of the host, while infection involves parasites residing inside the host.

<p>A definitive host is where the parasite reaches its mature form and is typically capable of reproduction.</p> Signup and view all the answers

<p>This is known as a dead-end host.</p> Signup and view all the answers

<p>This is called parasitism.</p> Signup and view all the answers

<p>Zoonoses are infectious diseases that are transmitted from animals, usually vertebrates, to humans.</p> Signup and view all the answers

<p>Commensalism is when one organism benefits without causing harm to the other.</p> Signup and view all the answers

<p>Anthropozoonosis refers to zoonotic diseases that are maintained in nature by animals and can be transmitted to humans, typically through direct contact with infected wildlife.</p> Signup and view all the answers

<p>Zooanthroponosis is parasitic infections maintained by humans that can be transmitted to other vertebrates, such as when a human carries a parasite that infects another species.</p> Signup and view all the answers

<p>Directly transmitted infections occur when the reservoir host directly infects humans, while infections spread via arthropods involve an intermediate vector, like ticks or mosquitoes, facilitating the transmission.</p> Signup and view all the answers

<p>Specific parasites are adapted to a particular host species, whereas incidental parasites can infect hosts outside their usual range, often leading to unexpected infections.</p> Signup and view all the answers

<p>A reservoir host is a host from which infectious agents can be maintained and transmitted to other susceptible hosts, playing a crucial role in the disease lifecycle.</p> Signup and view all the answers

<p>Humans can become infected with anthropozoonosis through exposure during hunting of wild animals.</p> Signup and view all the answers

<p>A facultative parasite can live independently but may also become parasitic under certain conditions.</p> Signup and view all the answers

<p>An arthropod serves as a vector by transmitting infection from the reservoir host to humans.</p> Signup and view all the answers

<p>A reservoir host is significant because it maintains the parasite, allowing transmission to other vertebrates, including humans.</p> Signup and view all the answers

<p>An incidental parasite is characterized by establishing itself in hosts that are not its primary target.</p> Signup and view all the answers

<p>A phoretic interaction is a non-permanent commensalistic relationship where one organism attaches to another for transport. In this scenario, the phoront benefits without causing harm to the host.</p> Signup and view all the answers

<p>A parasite requires a suitable host to complete its life cycle; it often can't reproduce or mature without the host's resources. Thus, the host's availability is crucial for its survival and propagation.</p> Signup and view all the answers

<p>A definitive host is where a parasite reaches its mature stage and can reproduce. It is essential for the parasite's development and completion of its life cycle.</p> Signup and view all the answers

<p>Incidental hosts harbor sexually immature parasites and are not necessary for the development cycle to progress, unlike definitive hosts where sexual reproduction occurs. This distinction impacts the spread of parasitic diseases.</p> Signup and view all the answers

<p>Zoonotic diseases are infectious diseases transmitted from animals, often vertebrates, to humans, posing risks for new infections in human populations. They can lead to outbreaks of diseases that were previously limited to animals.</p> Signup and view all the answers

<p>A reservoir host serves as a continuous source of infection for humans and harbors parasites, while an incidental host does not transmit the infection to other hosts. This difference is critical in epidemiology.</p> Signup and view all the answers

<p>Specific parasites target particular host species for their life cycle, whereas incidental parasites can infect various host species not typically associated with them. This influences how parasites adapt and spread.</p> Signup and view all the answers

<p>Commensal relationships illustrate interactions where one organism benefits without harming the other, aiding ecological balance and resource management. Recognizing these interactions enhances biological understanding.</p> Signup and view all the answers