[First case of chikungunya fever in Hermosillo, Sonora, Mexico].

The Chikungunya is an arbovirus first described during a 1952 outbreak of febrile exantematic disease in southern Tanganyika (now Tanzania). It is a virus within the alphavirus genus of the Togaviridae family, it is usually transmitted to humans by Aedes mosquitoes. Typically, the disease manifests as acute onset of fever and joint pains.

[Complications and cause of death in mexican children with rocky mountain spotted fever].

Background: Rocky Mountain spotted fever is a life threatening disease caused by Rickettsia rickettsia, characterized by multisystem involvement.

Methods: We studied 19 dead children with Rocky Mountain spotted fever. All children who were suspected of having rickettsial infections were defined as having Rocky Mountain spotted fever by serology test and clinical features.

[Diagnostic assessment of head nodding in hypoxemia in children with pneumonia].

Objective: To assess the clinical usefulness of the head nodding sign (HN) in children with pneumonia.

Material And Methods: Cross-sectional study that included 62 children aged 2-59 months. Hypoxemia was defined as arterial oxygen saturation <94% measured by pulse oximetry.

[Rocky Mountain spotted fever in children: clinical and epidemiological features].

Objective: To report the clinical features of the Rocky Mountain spotted fever (RMSF) in children of southern Sonora, Mexico.

Material And Methods: Nine cases were studied at the Sonora State Children's Hospital. One case was defined by clinical features and positive serological tests (indirect immunofluorescence assay or reaction to Proteus OX 19).

[Rocky mountain spotted fever: report of two cases].

Rocky Mountain spotted fever (RMSF) is an acute febrile illness caused by infection with Ricketsia Rickettsii, characterized by the presence of petechial rash. Even though the etiology, clinical characteristics and availability of effective antibiotics are known, RMSF related deaths have a prevalence of 4%. In its early stages RMFS can resemble many others infectious conditions and the diagnosis can be difficult.