Clinical and epidemiological comparison of Rickettsia parkeri rickettsiosis, related to Amblyomma triste and Amblyomma tigrinum, in Argentina.

The aim of this work was to compare the epidemiological and clinical characteristics of Rickettsia parkeri rickettsiosis related to Amblyomma triste and Amblyomma tigrinum ecological regions in Argentina. We reviewed cases of R. parkeri rickettsiosis from 2007 to 2017 evaluated at Muñiz Hospital, directly or through referral. Univariate analysis was used to examine the association between different variables and the disease related by each vector species. The eighteen cases of R. parkeri rickettsiosis included had fever, inoculation eschar and all except one had rash. Regional differences in epidemiological variables were identified, depending on the vector. There was a significantly increased risk of exposure to A. tigrinum in peri-domestic areas (odd ratio 12, p = 0.02), whereas an increased risk of exposure to A. triste was evident in wildlife areas (odd ratio 12, p = 0.02). Seasonality of R. parkeri rickettsiosis differed based on its vector. Cases associated with A. triste occurred predominantly during spring and summer, whereas those associated with A. tigrinum occurred during fall, winter, and springtime. Exanthema was maculopapular (13/18), maculo-vesicular (3/18) or petechial (1/18). No clinical differences were identified depending on the vector.

Exantema asociado a COVID-19 / COVID-19 skin rash

A partir de marzo de 2020 se han empezado a describir lesiones cutáneas asociadas a COVID-19 que fueron agrupadas en patrones y se relacionaron con la severidad y la temporalidad de la enfermedad. Se presenta el caso de un paciente con COVID-19 leve y lesiones cutáneas que pueden atribuirse a la infección. Se realiza una revisión de las manifestaciones cutáneas asociadas a COVID-19 y la interpretación de los diagnósticos diferenciales que se pensaron en el paciente

Since March 2020, skin lesions associated with COVID-19 have begun to be described. These were grouped into patterns, and were related to the severity and temporality of the disease. A patient with mild COVID-19 and skin lesions that can be attributed to the infection is presented. A review of the cutaneous manifestations associated with COVID-19 and the interpretation of the differential diagnoses that were thought of in the patient is carried out.