Wheezing in children with pertussis associated with delayed pertussis diagnosis.

Background: The classic clinical features of paroxysmal pertussis are often absent in older children and adults and after vaccination. The California pertussis epidemic of 2010 occurred in a highly vaccinated population.

Methods: All pediatric patients (0-18 years) with positive pertussis polymerase chain reaction from July to December 2010 were identified retrospectively from the Kaiser SCAL database.

Recurrent papular urticaria after varicella immunization in a fifteen-month-old girl.

Varicella-like rash after immunization with the live attenuated varicella vaccine is relatively common. Such vaccine-associated rashes generally consist of fewer lesions than occur in chickenpox. We describe a 15-month-old girl who experienced the onset of recurring papular urticaria after varicella immunization.

A large outbreak of histoplasmosis among American travelers associated with a hotel in Acapulco, Mexico, spring 2001.

During spring 2001, college students from Pennsylvania reported an acute febrile respiratory illness after returning from spring break vacation in Acapulco, Mexico. Acute pulmonary histoplasmosis was presumptively diagnosed and the cluster of illness was reported to the Centers of Disease Control and Prevention. A large investigation then ensued, which included finding student-travelers for interviews and requesting sera for histoplasmosis testing.