Congenital, Hereditary, and Neonatal Diseases and Abnormalities: Diseases existing at birth and often before birth, or that develop during the first month of life (INFANT, NEWBORN, DISEASES), regardless of causation. Of these diseases, those characterized by structural deformities are termed CONGENITAL ABNORMALITIES.Infant, Newborn, Diseases: Diseases of newborn infants present at birth (congenital) or developing within the first month of birth. It does not include hereditary diseases not manifesting at birth or within the first 30 days of life nor does it include inborn errors of metabolism. Both HEREDITARY DISEASES and METABOLISM, INBORN ERRORS are available as general concepts.Streptococcus agalactiae: A bacterium which causes mastitis in cattle and occasionally in man.Streptococcal Infections: Infections with bacteria of the genus STREPTOCOCCUS.Infant, Newborn: An infant during the first month after birth.Serotyping: Process of determining and distinguishing species of bacteria or viruses based on antigens they share.Pregnancy: The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.Abnormalities, MultipleChromosome Aberrations: Abnormal number or structure of chromosomes. Chromosome aberrations may result in CHROMOSOME DISORDERS.