[Incidence of Streptococcus pyogenes pharyngitis in Bariloche, Argentina]. / Incidencia de faringitis por Streptococcus pyogenes en Bariloche, Argentina.

The incidence and seasonality of pharyngitis by S. pyogenes in Bariloche, a city where long periods of low temperatures result in extended indoor activities were studied. A total of 5276 throat swab specimens collected during 2000-2003 in the clinical microbiology laboratories of the three main medical institutions of the city, were analyzed. Samples were cultured on blood-agar media containing 5% defibrinated sheep blood, and incubated for 24-48 h at 35 degrees C. Strains were identified using standard procedures. Monthly means for throat swabs, S. pyogenes isolates, and percent of S. pyogenes pharyngitis, were estimated. The incidence of pharyngitis by this microorganism was greater than 24% for every month within the April-December period, reaching a maximum in November (33%). February was the month with the lowest incidence (13%). It was observed an increasing trend since March through November with a through in July, and a marked decrease that began in December, reaching its lowest rate in January and February, the warmest months. This seasonal pattern differs from those observed for temperate climates. The incidence of S. pyogenes pharyngitis in Bariloche was high through the greater part of the year, since about the middle of autumn to the beginning of summer.

Incidencia de faringitis por Streptococcus pyogenes en Bariloche, Argentina / [Incidence of Streptococcus pyogenes pharyngitis in Bariloche, Argentina]

The incidence and seasonality of pharyngitis by S. pyogenes in Bariloche, a city where long periods of low temperatures result in extended indoor activities were studied. A total of 5276 throat swab specimens collected during 2000-2003 in the clinical microbiology laboratories of the three main medical institutions of the city, were analyzed. Samples were cultured on blood-agar media containing 5

defibrinated sheep blood, and incubated for 24-48 h at 35 degrees C. Strains were identified using standard procedures. Monthly means for throat swabs, S. pyogenes isolates, and percent of S. pyogenes pharyngitis, were estimated. The incidence of pharyngitis by this microorganism was greater than 24

for every month within the April-December period, reaching a maximum in November (33

). February was the month with the lowest incidence (13

). It was observed an increasing trend since March through November with a through in July, and a marked decrease that began in December, reaching its lowest rate in January and February, the warmest months. This seasonal pattern differs from those observed for temperate climates. The incidence of S. pyogenes pharyngitis in Bariloche was high through the greater part of the year, since about the middle of autumn to the beginning of summer.

Incidencia de faringitis por Streptococcus pyogenes en Bariloche, Argentina. / [Incidence of Streptococcus pyogenes pharyngitis in Bariloche, Argentina]

The incidence and seasonality of pharyngitis by S. pyogenes in Bariloche, a city where long periods of low temperatures result in extended indoor activities were studied. A total of 5276 throat swab specimens collected during 2000-2003 in the clinical microbiology laboratories of the three main medical institutions of the city, were analyzed. Samples were cultured on blood-agar media containing 5

defibrinated sheep blood, and incubated for 24-48 h at 35 degrees C. Strains were identified using standard procedures. Monthly means for throat swabs, S. pyogenes isolates, and percent of S. pyogenes pharyngitis, were estimated. The incidence of pharyngitis by this microorganism was greater than 24

for every month within the April-December period, reaching a maximum in November (33

). February was the month with the lowest incidence (13

). It was observed an increasing trend since March through November with a through in July, and a marked decrease that began in December, reaching its lowest rate in January and February, the warmest months. This seasonal pattern differs from those observed for temperate climates. The incidence of S. pyogenes pharyngitis in Bariloche was high through the greater part of the year, since about the middle of autumn to the beginning of summer.

Hantavirus pulmonary syndrome in the Province of Rio Negro, Argentina, 1993-1996.

Early in 1995 the first case of Hantavirus Pulmonary Syndrome was serologically confirmed in El Bolsón (Province of Río Negro, Argentina), corresponding to the third outbreak reported in Argentina. A total of 26 cases of HPS related to the Andean region of Rio Negro Province, were reported from 1993 to 1996, 17 in El Bolsón, 4 in San Carlos de Bariloche, and 5 in Buenos Aires. The incidence rate was 5.03 x 100,000 with a mortality rate of 51.85 x 100. The occurrence of cases was mainly seasonal, with a significantly greater number in the spring, and the persons affected mainly lived in urban or periurban areas. In four cases, the affected individuals were members of a couple, spouses or live-in contacts. Seven cases were Health workers (physicians, nurses or administrative staff). Twelve cases were related among them, due to an outbreak of 80 days. Two of them did not visit the Andean region. A total of 139 rodents were captured and seven of them, Olygoryzomys longicaudatus, were found to be serologically positive. The possibility of infection by contact with rodents or fecal matter is being analyzed and also hypothesis related with interhuman transmission.