What does bacteriolysis mean?
Bacteriolysis refers to the destruction of bacterial cells through the rupture or disintegration of their outer membranes, causing the cell contents to leak out and the organism to die. The process is most often triggered by components of the immune system — notably antibodies acting together with complement proteins — but it can also result from chemical agents such as disinfectants, or from enzymes known as lysins. In laboratory immunology, bacteriolysis has long served as a classic assay: mixing bacteria with serum and observing whether they lyse provides evidence of complement activity. Because it is a specialized scientific term, bacteriolysis appears mainly in microbiology, immunology, and medical literature rather than everyday speech. It is related to the broader concept of lysis, which applies to any cell type. Understanding the word offers insight into how the body can kill pathogens directly, without engulfing them, simply by dissolving their protective walls.
nounThe destruction or dissolution of bacterial cells, typically caused by chemical agents, antibodies, complement, or lysins that rupture the bacterial membrane.
- The destruction of bacterial cells by rupture of their membranes, as caused by antibodies with complement, bactericidal agents, or other lysins.
"The serum's complement activity was measured by its ability to induce bacteriolysis in the cultured sample."
"Complement-mediated bacteriolysis of Gram-negative bacteria requires both specific antibody and an intact complement cascade."
"Early immunologists used bacteriolysis assays to demonstrate that serum could kill bacteria without phagocytic cells."
Rarely used; the term is normally treated as denoting a general process rather than countable instances.
"Different antisera induced distinct patterns of bacteriolyses across the bacterial strains tested."
Your immune system doesn't always eat bacteria — sometimes it just makes them pop, a process scientists call bacteriolysis.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of bacteriolysis
Bacteriolysis derives from the Greek roots bakterion (diminutive of bakteria, meaning small rod) and lysis (meaning loosening, dissolving, or destruction), combined in modern scientific Latin during the late nineteenth century alongside the rise of germ theory and serology. It belongs to a family of scientific terms built on -lysis, including electrolysis, catalysis, and paralysis, all describing breakdown or release processes.
Related word forms
How bacteriolysis is actually used
A technical term used almost exclusively in microbiology and immunology; rare outside scientific writing.
Easily confused with bacteriolysis
Hemolysis is the destruction of red blood cells, whereas bacteriolysis is specifically the destruction of bacteria.