Science Source Stock Photo - HIV, Human Immunodeficiency Virus, TEM

HIV, Human Immunodeficiency Virus, TEM

Description: Transmission Electron Micrograph (TEM) of a number of human HIV virus particles. The human immunodeficiency virus (HIV) is a lentivirus (a subgroup of retrovirus) that causes HIV infection and over time acquired immunodeficiency syndrome (AIDS). AIDS is a condition in humans in which progressive failure of the immune system allows life-threatening opportunistic infections and cancers to thrive. Without treatment, average survival time after infection with HIV is estimated to be 9 to 11 years, depending on the HIV subtype. Infection with HIV occurs by the transfer of blood, pre-ejaculate, semen, vaginal fluids, or breast milk. Within these bodily fluids, HIV is present as both free virus particles and virus within infected immune cells. HIV infects vital cells in the human immune system such as helper T cells (specifically CD4+ T cells), macrophages, and dendritic cells. When CD4+ T cell numbers decline below a critical level, cell-mediated immunity is lost, and the body becomes progressively more susceptible to opportunistic infections. Magnification: unknown.

Credit:

/Science Source

Unique identifier: SS2431107

Legacy Identifier: BP3770

Type: Image

Size: 1855px × 1417px (~7 MB)

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