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.
Grass-dominated ecosystems that contain a significant number of widely spaced trees are termed savannas. Trees may make up as little as 5 percent or as much as 30 percent of the cover of all plants in savannas, but grasses and grasslike plants form a continuous ground cover. Originally, savanna was a term used to describe primarily tropical and subtropical grasslands, which usually have more woody plants than temperate grasslands. These tropical and subtropical savannas occupy large land areas. Almost 65 percent of Africa is covered by savanna, much of the northern region of Australia has savanna vegetation and South America has extensive savannas. Worldwide, estimated land cover by savanna is nearly 20 percent.