November Gallery

1993 Australian GP

ADELAIDE STREET CIRCUIT, AUSTRALIA - NOVEMBER 07: The Flying Finn Mika Hakkinen launches his McLaren MP4/8 into the air at the Malthouse Corner during a lap in practice during the Australian GP at Adelaide Street Circuit on Sunday November 07, 1993 in Adelaide, Australia. (Photo by Mark Sutton / Sutton Images)

© Motorsport Images

LM of head of Lyme disease tick, Ixodes ricinus

Lyme disease tick. Light micrograph of the tick Ixodes ricinus, principal vector of Lyme disease in Europe. At centre is the head of the tick with its barbed blood-sucking mouthparts (hypostome, white). The tick is common in Europe and attacks humans, domestic and wild animals. Ixodes ricinus carries the spirochaete bacterium Borrelia burg- dorferi, cause of both Lyme disease and a closely- related disease known as erythema migrans. Both diseases cause skin lesions, neurological and cardiac abnormalities and recurrent arthritis. In North America Lyme disease is transmitted by related ticks I.dammini and I.pacificus. Darkfield illumination. Magnification: x40 at 6x7cm size

© PASIEKA/SCIENCE PHOTO LIBRARY

Streptococcus mutans bacteria on tooth

Streptococcus mutans bacteria. Coloured scanning electron micrograph (SEM) of Streptococcus mutans bacteria adhering to the enamel of a tooth. At top is a typical chain of these Gram-positive, non- motile, spherical bacteria. Lower down (white) is dental enamel. Streptococcus mutans is a major cause of tooth decay and one of the principal bacteria that cause plaque formation on teeth. It produces dextran, the adhesive glucose which makes up plaque. Within plaque, bacteria produce large amounts of lactic acid, causing demineralization of the tooth enamel and dentine, resulting in caries (tooth decay). Magnification: x20, 000 at 6x7cm, x11, 000 at 35mm size. x63, 000 at 8x10ins

© DR KARI LOUNATMAA/SCIENCE PHOTO LIBRARY