[Neglected patients, unexpected effects. Ebola virus disease suspected case experience.] / Patients négligés, effets imprévus. L'expérience des cas suspects de maladie à virus Ebola.

INTRODUCTION: In an epidemic context, the identification of suspected cases, among alert or contact cases, leads to caring for persons for whom only a minority will be confirmed cases, with a laboratory diagnosis positive for Ebola. How are suspected cases treated that are not subsequently confirmed and how do they feel about this experience ? What are the medical or social consequences ? METHODS: A qualitative study was conducted in two countries with a high Ebola risk epidemic situation in 2015-2016 (Senegal, Côte d'Ivoire). Based on interviews with suspected cases and caregivers, 12 referral itineraries were identified for 20 people. RESULTS: Narratives are dominated by the perception of failures at several levels: insufficient means and service preparation; lack of care for patients' vital needs and lack of treatment for their diseases; lack of listening, explanation and consideration for their families; patients' suffering from being isolated and facing violence; unexpected secondary social effects. These findings can be explained partly by caregivers' focus on Ebola diagnosis more than patients, fear of contagion, and by the insufficient preparation of isolation spaces at the time of the survey. CONCLUSION: The results show the possible pitfalls of surveillance systems which increase the number of persons identified as suspected cases, if care services are not sufficiently prepared. Recommendations based on these results should be considered particularly to define operational procedures and trainings for health professionals.

beta2-Adrenergic signaling in human heart: shift from the cyclic AMP to the arachidonic acid pathway.

We have recently established that enhancement of intracellular calcium cycling and contraction in response to beta2-adrenergic receptor (beta2-AR) stimulation exclusively relies on the activation of the cytosolic phospholipase A2 (cPLA2) and arachidonic acid production, via a pertussis toxin-sensitive G protein (possibly Gi), in embryonic chick cardiomyocytes. We aimed to investigate the relevance of the beta2-AR/Gi/cPLA2 pathway in the human myocardium. In left ventricular biopsies obtained from explanted hearts, beta2-AR stimulation exerted either an inhibition of cPLA2 that was insensitive to pertussis toxin (PTX) treatment, or an activation of cPLA2, sensitive to PTX treatment. In right atrial appendages from patients who were undergoing open heart surgery, we demonstrated that beta2-AR-induced activation of cPLA2 was favored in situations of altered beta1-AR and/or beta2-AR/adenylyl cyclase (AC) stimulations. Alterations were characterized by an increase in EC50value of norepinephrine and a decrease in the maximal AC activation in response to zinterol, respectively. Quantitative reverse transcription-polymerase chain reaction analyses highlighted a positive correlation between the expression of AC5 and AC6 mRNAs in human cardiac atria, which suggested that functional alterations in AC responses were unlikely to be related to changes in the AC5/AC6 mRNA ratio. In addition, the shift from the cyclic AMP to the arachidonic acid pathway was not supported at the transcriptional level by opposite regulation of AC and cPLA2mRNAs expression. This study gives the first evidence of the recruitment of cPLA2by beta2-ARs in the human heart and suggests that the Gi/cPLA2pathway could substitute for a deficient Gs/AC pathway in mediating beta2-AR responses.