Definition: The term "Achromobacter" refers to a group of bacteria, which are characterized by their inability to grow in water or anionic media (such as ammonium or magnesium). Achromobacteria are typically found in soil, rainwater, groundwater, and other natural environments where they are abundant. They can be present in various forms, including spores, colonies, and filaments. The specific characteristics of the bacteria include their lack of a flagellum, which is a membrane-bound organelle essential for motility; inability to grow in water or anionic media; and sensitivity to acidic pH solutions. Achromobacteria can also exhibit a range of responses to light, including growth inhibition by UV radiation. The term "Achromobacter" has been used historically to describe the presence of a particular group of bacteria that was present in the environment at a given time period. It is now considered a common name for a wide variety of bacterial genera, including many of the types already mentioned, including Chlamydia, Vibrio, and Escherichia. In summary, Achromobacter refers to a group of bacteria with a lack of flagellum, an inability to grow in water or anionic media, sensitivity to acidic pH solutions, and different responses to light.

Achromobacter

Definition: The term "achromobacteria" refers to a group of bacteria that are distinguished by their ability to survive in a range of temperatures, often considered as "thermostable." These organisms can grow on ice, solid surfaces, or even under water. They exhibit thermoskill stability, meaning that they do not spontaneously break down into smaller sizes at low temperatures. In the field of microbiology, it is common to see several species of achromobacteria in various environments, including oceans, lakes, and freshwater bodies like rivers. These bacteria can be found in diverse ecosystems, ranging from marine organisms living in fresh water to freshwater sediments. They are important for understanding how certain environmental conditions affect the growth patterns and physiological processes of microorganisms. However, it's essential to note that these bacteria vary significantly across their host range and have evolved specific adaptations to survive in a wide variety of environments. Understanding them can help researchers better understand the diversity of life on Earth and the complex interactions between different organisms.

Achromobacterieae