[Primary immunodeficiencies in seriously ill children: Report of 3 clinical cases].

Unlabelled: Primary immunodeficiency diseases (PID) are congenital disorders secondary to an impaired immune response. Infections, autoimmune disorders, atopy, and lymphoproliferative syndromes are commonly associated with this disorder.

Objective: To present and discuss 3 infants diagnosed with PID.

[Waist-to-height ratio does not change with gender, age and pubertal stage in elementary school children].

Background: Waist-to-height ratio (WHtR) is a cardiometabolic risk indicator in children. A value greater than or equal to 0.55 is an effective screening tool for identifying obese children with metabolic syndrome.

[Antibiotic susceptibility patterns among Shigella sonnei, isolated during three different periods in Región Metropolitana, Chile].

Background: Shigella sonnei gastroenteritis improves clinically and microbiologically with antibacterial treatment; however choosing a useful drug is a universal challenge because of in vitro susceptibility of S. sonnei frequently evolves to be resistant.

Objective: To evaluate in vitro susceptibility of S.

Waist circumference percentiles in children and adolescents between 6 and 14 years from Santiago, Chile.

Objective: To describe the percentile distribution of waist circumference (WC) by sex and age in a representative sample of children and adolescents of lower-middle and low socioeconomic status in Santiago, Chile.

Methods: A cross-section of 3022 primary-school students between the ages of 6 and 14 from middle-low and low-class schools of Santiago. Ten schools from the Primary Education Society (SIP) in Santiago, Chile, were selected at random.

[Espondilodiskitis caused by Kingella kingae in children: a case report].

During the last years, spondilodiskitis due to Kingella kingae has been a new target of interest, since it is the second agent that causes non tuberculous espondilodiskitis in children, after Staphylococcus aureus. Its clinical presentation is very inespecific, sometimes with fever, abdominal or lumbar disconfort, nocturnal pain, altered walking and sedestation. Images, culture methods and PCR (polymerase chain reaction) can be helpful for diagnosis, although in an important percent of the cases, etiology cannot be determined.

[Prevalence of hypertension in school age children and its association with obesity].

Background: Hypertension in children is a frequently overlooked problem that is an important cardiovascular risk factor.

Aim: To determine the prevalence of hypertension among school age children.

Material And Methods: Cross-sectional study of 2980 children aged 10 ± 2 years (48% females) from 10 schools of middle and lower class in Metropolitan Santiago.