Definitive host allows the parasite to reproduce sexually. Plasmodium sexually reproduce in the mosquito, then why it's an intermediate host?
it is final host
but in plasmodium, Babesia , Theleria , Anaplasma act as vector
regard
Many people talk about the mosquito as being a "vector" and avoid calling in an "intermediate host", considering that sexual reproduction occurs in the mosquito. Other people refer to mosquitoes as definitive hosts of Plasmodium.
The late Norman D. Levine did not like the description "final host" in relation to Toxoplasma and Sarcocystis. He said there is nothing "final" about the carnivore host, transmission being ongoing. He preferred "definitive host".
Mosquito is the definitive host for plasmodiun as sexual reproduction takes place inside it while man is the intermediate host.
The definitive host of the malarial plasmodium is a female mosquito of the genus Anopheles. This is not discussed
The definitive host of plasmodium spp. is the mosquito of anopheles genus, remember gametocytes are in human blood but the sexual reproduction takes place inside female mosquito. That is why, you can say that human is the intermediate host.
Mosquito is the definitive host of plasmodium spp . gametogny ( sexual replication) occurs in the stomach of mosquito
Plasmodium depends on two organisms as vectors to get nutrition and develop. Since the major development takes place within the mosquito and it involves sexual reproduction then, mosquito is the definitive host. Also, since the development that takes place is shortly and asexual in humans, then humans are intermediate host. Actually, gametocytes are in human blood but the sexual reproduction takes place inside female Anopheles mosquito. Most importantly, both mosquito and humans are vectors of the parasite plasmodium.
Some people do not like "vector" being used in relation to mosquitoes that inoculate plasmodial sporozoites into humans. [They do not use "vector" for humans either.] This is because a developmental cycle takes place inside the mosquito. Those people think that "vector" should be reserved for "transport hosts" ("paratenic hosts") in which no life cycle-associated development of the organism concerned occurs. An example would be a fly that is carrying helminth eggs or larvae (either inside or outside the body of the fly or both) that it has picked up in the environment from human faeces. If this view is taken, then one could talk about, in relation to Plasmodium, the "mosquito host" and the "human host", etc. I.e. avoid using the word "vector".
Mosquito is the definitive host for Plasmodium. Man is the intermediate host where asexual reproduction takes place.
To add, the confusion comes from the false idea that vectors cannot be the definitive host. Biologic vectors, in contrast to phoretic/mechanical vectors, can either be a definitive or intermediate host. In the case of Plasmodium, mosquitoes are both the vectors (vehicle of transmission toward the vertebrate host) and definitive hosts (venue of sexual reproduction).
Yes, it boils down to (in the case of Plasmodium) calling the mosquito the (definitive) host or the vector. This is despite the fact that a minority of people prefer restriction of "vector" to a carrier of whatever organism that does not undergo life cycle reproduction in the carrier.
by definition, the intermediate host is a living organism in which the pathogen must remain for a certain time either to multiply or to undergo a maturation that brings it to its infesting form. It hosts the larval or non-sexual form of the parasite From these facts, two types of intermediate hosts are distanced:
-an active intermediate host that is a host capable of itself transmitting the pathogen.Example Anopheles sp is an intermediate host active in malaria and a so-called passive intermediate host that is unable to transmit itself the pathogen that it hosts. For example, Cyclops in Dracunculiasis
therefore in the mosquito occurs sexual reproduction but it does not hibernate the adult form of the parasite which is characteristic of an intermediate host.
The parasite which causes malaria (Plasmodium) requires two different hosts—a vertebrate intermediate host, like human, and an insect definitive host, also known as the vector. For the types of malaria which infect humans and other mammals, the vector is always a mosquito of the genus Anopheles. Thus, as quoted in the argument, by Ferdinand Mendoza (2017) in Plasmodium, mosquitoes are both the vectors (vehicle of transmission toward the vertebrate host) and definitive hosts (venue of sexual reproduction).
Mosquito is the intermediate host because as a vector it transmitted the parasite from one person to another.
Human is the definite host
I absolutely agree with Hala Elwakil - mosquito is the definitive host of plasmodium spp., because sexual replication occurs in the stomach of mosquito
- Badges
- Science topic
- Similar topics
- Phytochemistry
- Extracts