Babies with CMV that is passed along during birth or through breastmilk (perinatal CMV) may not have symptoms. 1  Signs and symptoms are usually seen only in very premature or sick newborns between 3 weeks and 6 months of age. They may include: 2  Abnormal blood test results.
Typical tropical savanna in Northern Australia demonstrating the high tree density and regular spacing characteristic of many savannas. A savanna or savannah is a mixed woodland grassland ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to support an unbroken herbaceous layer consisting primarily of grasses.
Savanna is essentially grassland interspersed with trees. It is sometimes found in temperate climates, usually in areas that are transitional zones between grassland and forests. However, savanna is mostly found in tropical regions of the world where the climate changes in a seasonal pattern from cool and dry to hot and dry and then to warm and wet before starting the cycle again the following year. Lakes, ponds, streams, and rivers are all types of freshwater aquatic biomes.