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canvas prints spinach canvas prints plants canvas prints botany canvas prints leaf canvas prints stomate canvas prints stomata canvas prints bacteria canvas prints e.coli canvas prints escherichia canvas prints sem canvas prints scanning canvas prints electron canvas prints micrograph canvas prints coloured canvas prints false-coloured canvas prints

photographs spinach photos plants photos botany photos leaf photos stomate photos stomata photos bacteria photos e.coli photos escherichia photos sem photos scanning photos electron photos micrograph photos coloured photos false-coloured photos

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Coloured scanning electron micrograph (SEM) of Escherichia coli bacteria localized near a stoma from the common spinach leaf (Spinacia oleracea). Escherichia coli is a Gram-negative, enteric, facultatively anaerobic, rod prokaryote (bacterium). Toxic E. coli strains, such as the E. coli 0157:H7 strain, are a health hazard and cause severe food poisoning and sometimes death. E. coli may grow on vegetables if the water used for irrigation is contaminated with animal faecal material. Even though washing is recommended, this electron micrograph shows that the E. coli bacteria are present in higher concentrations around stomata (openings for respiration in leaves) and can enter the leaves through the stomata. Once inside the leaf bacteria would be hard to remove by washing. Similar bacterial contamination has been found in lettuce and green onions. Magnification: x800 when shortest axis printed at 25 millimetres.

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