الفهرس 
LEPTOSPIRA ORGANISMSOnly 14 pages are availabe for public view
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Abstract
Leptospirosis is an infectious zoonotic
disease that affects wild and domestic
animals as well as human. It occurs
worldwide but it is most common in
tropical and subtropical areas with high
rainfall. Many surveys proved that the
disease is present in Egypt. It is caused by
pathogenic bacteria called leptospira.
Leptospires belong to the genus leptospira, family
Leptospiraceae, order Spirochaetales. The phenotypic
classification of leptospires to pathogenic (L. interrogans), and
non-pathogenic (L. biflexa), has been replaced by a genotypic
one, in which 16 genomospecies include all serovars of both
groups.
Leptospires are highly motile, helical, obligate aerobic
spirochetes that share features of both gram-positive and gramnegative
bacteria. They are about 0.25 × 6-25μm in size,
characterized by its sharp, tapering, hooked ends. They grow in
simple media enriched with vitamins (B1 and B12), long-chain
fatty acids and ammonium salts with an optimum growth
temperature of 28 to 30°C.