Low prevalence of asthma in Mexican children and adults with a positive rtRT-PCR test for SARS-CoV-2: a cross-sectional study during the 2020 pandemic.

Background: It has recently been argued that asthma does not increase the risk of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infection. If so, the prevalence of asthma in subjects diagnosed with COVID-19 should be lower than in the general population.

Objective: To determine the prevalence of asthma in Mexican children and adults with SARS-CoV-2 infection.

[Early congenital syphilis, inadequate screening. Case report].

Background: Congenital syphilis is still a problem for developing countries, despite the screening options and low cost treatment.

Clinical Case: 23-day-old male patient with copper colored macules and scaling in palms and soles, as well as hepatomegaly. It was reported a negative TORCH test with VDRL of 1:512 and positive FTA ABS.

Asthma prevalence, but not allergic rhinitis nor atopic dermatitis, is associated to exposure to dogs in adolescents.

Background: Exposure to pets can be a predisposing factor in the development of certain diseases, including allergic diseases.

Objective: We analyzed the role that exposure to indoor dogs and cats plays in the prevalence of allergic diseases.

Methods: We examined the cross-sectional data of 1056 women and 936 men aged 15 to 18 years; these individuals were selected through stratified and cluster random sampling.

Prevalence of respiratory viruses in wheezing children not older than 24 months of age.

Introduction: Wheezing in children not older than 24 months of age is a frequent event, and viruses are usually the causative agents. The aim of the study was to estimate the prevalence of respiratory viruses in wheezing children who were not older than 24 months of age and who had no history of asthma.

Methods: Fifty-five Mexican children were included in an analytical cross-sectional study.

Viral coinfection in acute respiratory infection in Mexican children treated by the emergency service: A cross-sectional study.

Background: Acute respiratory infections (ARIs) cause illness. Children under five years of age are highly vulnerable to these infections. Viral coinfection or multiple viral infection is a variable that can have a significant impact on the evolution of these diseases.