The World Health Organization defines obesity as the excessive fat accumulation that poses a risk to health; it represents a public health problem. Obesity is a complex disease that depends on numerous factors including the environment and diet. However, despite exposure to the same factors, some people develop more severe degrees of obesity than others, due to individual genetic predisposition.

Streptococcus spp has acquired great importance due to the high pathogenicity of its different species around the world. The Group B Streptococcus is commonly found in the vaginal area of pregnant women, which at delivery may lead to contamination of the newborn. Only some of these infants develop the infection and may present sepsis, meningitis, neonatal pneumonia, among other complications, including permanent neurological sequelae, delayed growth and death. Preventive strategies include screening and early detection to avoid the risk of infection. In recent decades the use of molecular techniques for early diagnosis and treatment has increased that would decrease morbidity and mortality attributed to Group B Streptococcus.