Outline On Hosts And Parasites
Parasitical Worms.com Dear Mr. Anh, I am a parasite medical student, I want to ask the doctor about the host types, what is the main host? Secondary host? Intermediate and permanent hosts? I would like to thank the doctor. NTL, Tp. HCM
Please answer you as follows:
Host means an organism on which the parasite is attached
Host forever
Permanent hosts are those that contain the parasite at an adult stage or are determined to breed
For example: He is the permanent host of roundworm, hookworm, liver fluke, tapeworm
Intermediate host
When the larvae or the immature stage of a parasite live on another organism, this organism is called an intermediate host
For example, parasitic flukes in humans have: snails are intermediate hosts 1, aquatic plants or fish are intermediate hosts 2
Main host, secondary
Primary host: is the organism that parasites or parasites
Secondary host: is the organism that sometimes contains the parasite
Example: Pigs are the main host of Balantidium coli (80% - 90% infection rate) while humans are secondary hosts (very rare)
Master (reservoir)
An animal carrying a parasite of a person or place where a parasite is found and can infect humans
Example: Wild cats are the hosts of the liver fluke Clonorchis sinensis. The soil environment is the host of Entamoeba histolytica amoeba.
.Vector (vector)
An insect or mollusk carrying parasites and transmitting from person to person
Pathogen vectors: when parasites develop, increase population
Example: Anopheles mosquitoes are vectors of malaria parasites.
Median vector transmission: When parasites do not increase population
Example: Flies only act as carriers of amoeba cysts
Healthy people carry germs
People who carry parasites in the body but do not show signs of disease
For example: Person carrying a mip capsule or ascari eggs in the stool.
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