Influenza season in Réunion dominated by influenza B virus circulation associated with numerous cases of severe disease, France, 2014

The 2014 seasonal influenza in Réunion, a French overseas territory in the southern hemisphere, was dominated by influenza B. Resulting morbidity impacted public health. Relative to the total number of all-cause consultations over the whole season, the rate of acute respiratory infection (ARI) consultations was 6.5%. Severe disease occurred in 32 laboratory-confirmed influenza cases (31.7 per 100,000 ARI consultations), 16 with influenza B. The observed disease dynamics could present a potential scenario for the next European influenza season.

[Chikungunya outbreak on Reunion Island in 2005/2006: role of hospital physicians in raising alert]

The epidemic of chikungunya (CHIK) that swept through Reunion Island from late 2005 to mid 2006 affected 38.2% of the population, i.e., 300000 people. Although this outbreak took place in a French overseas department with high public health standards, failure to anticipate a large-scale epidemic associated with unprecedented severity and unexpectedly high mortality led to a major public health crisis. The purpose of this report is to provide a complete account of the experience of hospital intensive care physicians in addressing problems ranging from discovery of severe forms to management of a major health crisis. This report underlines the role of the head hospital physician and the necessity of mutual trust and collaboration with supervisory authorities.

[Outbreak of influenza A(H1N1)/2009: description of cases and crisis management in a ICU in Reunion Island]

OBJECTIVES

to describe the characteristics, treatment and outcome of critically ill patients with influenza A(H1N1) infection at St Pierre Hospital in Reunion Island during the 2009 outbreak, as well as the measures of care reorganization implemented to face them.

PATIENTS AND METHODS

prospective observational study of probable and confirmed cases of influenza A (H1N1)/2009 infection concerning hospitalized patients in a polyvalent intensive care unit (ICU).

RESULTS

thirteen patients have been included between August and September 2009. Three (23 %) didn't have any medical history. The median age was 42 [22-69]. Eleven have required pulmonary ventilation for 10.3 days (± 8). Three (23 %) have developed an ARDS. Three patients (23 %) died. To cope with the influx of cases and considering our situation of geographic isolation, it has been needed to totally rework the organization of care: set-up of a specific welcoming channel, division into sectors of the department, opening of additional beds, new on-duty assignment, inter and intra hospital cooperation.

CONCLUSION

reunion Island has been an experimental lab of crisis management during the H1N1/2009 epidemic, several months ahead of the mother country. To anticipate the reorganization of care in intensive care units during an outbreak period, particularly in small units or units isolated like ours, looks to us a must so to quietly face a sharp influx of patients.