What are the types of HIV strains Characterised?

HIV strains and types

• There are two main types of HIV – HIV-1 (the most common) and HIV-2 (relatively uncommon and less infectious).
• Like many viruses, HIV has the ability to mutate and change over time – within the main types of HIV there are many genetically distinct subgroups.

What are characteristics of HIV?

As the virus continues to multiply and destroy your immune cells — the cells in your body that help fight off germs — you may develop mild infections or chronic signs and symptoms such as: Fever. Fatigue. Swollen lymph nodes — often one of the first signs of HIV infection.

What are the differences between HIV-1 and HIV-2?

HIV-1 is the most common type of HIV and accounts for 95\% of all infections, whereas HIV-2 is relatively uncommon and less infectious. HIV-2 is mainly concentrated in West Africa and the surrounding countries. HIV-2 is less fatal and progresses more slowly than HIV-1.

What are the symptoms of HIV-1 and 2?

What Are the Symptoms of HIV?

• Fever.
• Chills.
• Rash.
• Night sweats.
• Muscle aches.
• Sore throat.
• Fatigue.
• Swollen lymph nodes.

What are general characteristics of virus?

They are acellular, that is, they contain no cytoplasm or cellular organelles. They carry out no metabolism on their own and must replicate using the host cell’s metabolic machinery. In other words, viruses don’t grow and divide. Instead, new viral components are synthesized and assembled within the infected host cell.

What 7 characteristics do viruses have?

Let’s compare viruses to the 7 criteria researchers have set to determine if something is alive.

• Living things must maintain homeostasis.
• Living things have different levels of organization.
• Living things reproduce.
• Living things grow.
• Living things use energy.
• Living things respond to stimuli.

What are the characteristics of viruses Std 8?

They are acellular, that is, they contain no cytoplasm or cellular organelles. They carry out no metabolism on their own and must replicate using the host cell’s metabolic machinery. In other words, viruses don’t grow and divide.

What four characteristics are used to classify viruses?

Four characteristics were to be used for the classification of all viruses: Type of the nucleic acid including size of the genome, strandedness (single or double), linear or circular, positive or negative (sense), segments (number and size), sequence and G+C content etc.

Which 3 characteristics of life do viruses have?

Viruses are not made out of cells, they can’t keep themselves in a stable state, they don’t grow, and they can’t make their own energy. Even though they definitely replicate and adapt to their environment, viruses are more like androids than real living organisms.

What are the different groups of HIV-1 strains?

Groups within HIV-1. The strains of HIV-1 can be classified into four groups. 4 Of these, M is the ‘major’ group and is responsible for the majority of the global HIV epidemic. The other three groups – N, O and P – are quite uncommon. Group O represents up to 5\% of infections in several west and central African countries,…

What are the differences and similarities between HIV-1 and HIV-2?

In this article, we explore the differences and similarities between HIV-1 and HIV-2. HIV-1 and HIV-2 are genetically different but have similar effects on a person’s body. HIV-1 is the most common type of HIV and occurs all over the world. According to the HIV awareness charity Avert, around 95 percent of people living with HIV have HIV-1.

What are the symptoms of Stage 1 HIV infection?

Some people may experience a flu-like illness within 2 to 4 weeks after infection (Stage 1 HIV infection). But some people may not feel sick during this stage. Flu-like symptoms include fever, chills, rash, night sweats, muscle aches, sore throat, fatigue, swollen lymph nodes, or mouth ulcers.

What are the signs and symptoms of AIDS?

Common symptoms of AIDS include chills, fever, sweats, swollen lymph glands, weakness, and weight loss. People are diagnosed with AIDS when their CD4 cell count drops below 200 cells/mm or if they develop certain opportunistic illnesses. People with AIDS can have a high viral load and be very infectious.