Paint and image-editing software, such as Adobe Photoshop, generate bitmap images (not to be confused with the Photoshop Bitmap color mode), also called raster images. The images use a grid of small squares, known as pixels, to represent graphics.
Inflamed tonsils. Tonsillitis is most often caused by common viruses, but bacterial infections can also be the cause. The most common bacterium causing tonsillitis is Streptococcus pyogenes (group A streptococcus), the bacterium that causes strep throat.Other strains of strep and other bacteria also may cause tonsillitis.onsillitis is most often caused by common viruses, but bacterial infections can also be the cause.
Gram-positive bacteria retain a purple-colored stain, while Gram-negative bacteria appear pinkish or red. Gram-negative bacteria can cause many types of infections and are spread to humans in a variety of ways. Several species, including Escherichia coli, are common causes of foodâborne disease.Vibrio cholerae âthe bacteria responsible for choleraâis a waterborne pathogen. Gram-negative bacteria can also cause respiratory infections, such as certain types of pneumonia, and sexually transmitted diseases, including gonorrhea.Yersinia pestis, the Gram-negative bacterium responsible for plague, is transmitted to people through the bite of an infected insect or handling an infected animal.ram-positive bacteria retain a purple-colored stain, while Gram-negative bacteria appear pinkish or red. Gram-negative bacteria can cause many types of infections and are spread to humans in a variety of ways. Several species, including Escherichia coli, are common causes of foodâborne disease.