Question: Which Of The Following Is An Obligate Parasite?

What is obligate parasite example?

Some bacteria are obligate parasites and grow only within a living host cell.

Rickettsia and Chlamydia, for example, grow in eukaryotic cells, and Bdellovibrio grow in bacterial cells.

Treponema pallidum is difficult, if not impossible, to grow in culture, probably because it requires low oxygen tension and low….

What are the 3 main classes of parasites?

A parasite is an organism that lives on or in a host organism and gets its food from or at the expense of its host. There are three main classes of parasites that can cause disease in humans: protozoa, helminths, and ectoparasites.

What are the examples of facultative parasite?

A facultative parasite is an organism that may resort to parasitic activity, but does not absolutely rely on any host for completion of its life cycle. Examples of facultative parasitism occur among many species of fungi, such as family members of the genus Armillaria.

What is meant by obligate intracellular parasite?

Obligate intracellular parasites cannot reproduce outside their host cell, which means that the parasite’s reproduction is entirely reliant on intracellular resources.

What is a temporary parasite?

temporary parasite one that lives free of its host during part of its life cycle.

Which microbes is called an intracellular parasite?

Obligate intracellular parasites of humans include: Viruses. Certain bacteria, including: Chlamydia, and closely related species. Rickettsia.

What is intracellular?

: existing, occurring, or functioning within a cell intracellular parasites.

Which of the following is an example of an obligate human parasite?

Rickettsia and Chlamydia are examples of obligate parasites that require eukaryotic host cells to survive.

What does parasite mean?

A parasite is an organism that lives in another organism, called the host, and often harms it. It depends on its host for survival. Without a host, a parasite cannot live, grow and multiply. … Parasites, unlike predators, are usually much smaller than their host and they reproduce at a faster rate.

Is Chlamydia an obligate intracellular parasite?

Chlamydiae are obligate intracellular bacteria. They lack several metabolic and biosynthetic pathways and depend on the host cell for intermediates, including ATP. Chlamydiae exist as two stages: (1) infectious particles called elementary bodies and (2) intracytoplasmic, reproductive forms called reticulate bodies.

Which one of the following are intracellular obligate parasite?

VirusesViruses are non-cellular, infectious, obligate, intracellular parasites. These are genetic elements (DNA or RNA) wrapped in a protein coat and are not considered to be organisms, as they cannot reproduce independently.

What is a permanent parasite?

Permanent parasite A. ( A parasite that all stages of its life cycle permanently parasitize a host. Have no free living. stages)

Which is obligate parasite?

An organism that cannot survive independently of a host species. Some pathogenic organisms, including the smallpox and poliomyelitis viruses, are obligate parasites. From: obligate parasite in A Dictionary of Public Health »

Is virus an obligate parasite?

Viruses are obligate intracellular parasites that can be maintained only inside living cells.

What’s the difference between parasite and virus?

Bacteria and viruses can live outside of the human body (such as on a countertop) sometimes for many hours or days. But parasites need a living host to survive. Bacteria and parasites can often be killed with antibiotics. But these medicines can’t kill viruses.