G6PD deficiency may cause severe anemia. Ganciclovir may be administered intravenously via an indwelling central catheter or via an intraocular implant. Side effects of ganciclovir include neutropenia. A gene contains hereditary information encoded in the form of DNA and is located at a specific position on a chromosome in a cell's nucleus.
Genes determine many aspects of anatomy and physiology by controlling the production of proteins.
Each individual has a unique sequence of genes, or genetic code. Examples include adding a gene to a cell to produce a specific missing protein, using antisense molecules to prevent viral replication, and altering CD4 cells to make them resistant to HIV infection. Genes may be introduced by direct injection or using a harmless viral vector to deliver genes into cells. Contrast with phenotype. Giardia infects the intestines and produces nausea, cramping and diarrhea.