![]() ![]() ![]() (A micrometer equals 1/1,000,000 of a meter. Scanning electron micrograph of methicillin-resistant Staphylococcus aureus (MRSA) courtesy of CDCĪn average coccus is about 0.5-1.0 micrometer (µm) in diameter. scanning electron micrograph of Staphylococcus aureus, a staphylococcus courtesy of Dennis Kunkel's Microscopy There are many different types of Gram-negative bacteria some examples include Enterobacter, Escherichia, Haemophilus, Klebsiella, Pseudomonas, Salmonella, Shigella, and Yersinia. Only the single-celled organisms of the domains Bacteria and Archaea are classified as prokaryotespro means before and kary means nucleus. A swab from a bin spread directly onto nutrient agar. All cells fall into one of these two broad categories. Colony morphology is a method that scientists use to describe the characteristics of an individual colony of bacteria growing on agar in a Petri dish. negative image of Staphylococcus aureus Students should examine cultures in containers, which have been taped and closed. ![]()
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