Background:Listeria monocytogenes is a gram-positive bacteria that cause the invasive disease listeriosis. Human clinical syndromes are infrequent, mostly appearing in immunosuppressed individuals, newborns, the elderly, pregnant women, and occasionally healthy patients.Objectives:We describe and analyze Listeria-related demographics and clinical features to determine the predisposing conditions for severe infections in an immunodepressed population by rheumatic diseases.Methods:Descriptive Observational Study. A retrospective analysis of 143 patients were performed affected by listeriosis, with positive isolation of Listeria monocytogenes from blood, treated in the H.U. Virgen del Rocío (Seville- Spain) between 2003-2019. Of them 9 were rheumatic patients. The type of clinical manifestation was analyzed, paying special attention to the characteristics associated with patients with neurological complications or unfavorable outcome (death and / or abortion in pregnant women), immunosuppression (associated with cancer or rheumatic disease) was assessed as independent variables, chronic diseases (Hypertension, Diabetes Mellitus, dyslipidemia, COPD, Renal Insufficiency and Ischemic Heart Disease) as well as other baseline characteristics of the patient. (age, sex, pregnancy) and their toxic habits (tobacco and alcohol).Results:The sample includes a similar proportion of men (70 cases) and women (73 cases), of all ages. Of the total patients, most (85%) required hospital admission, with a duration median (non-parametric data) of 11 days. 78% of the cases admitted showed a favorable evolution. However, 15.4% resulted in death and 5.6% in abortion. This percentage of abortions represented 29% of the total pregnant women admitted Of all the patients admitted, a third (33%) were immunocompromised, including patiets with cancer (79%) and rheumatic diseases (21%). Include lupus (33%), RA (22%), APs (11%), polymyalgia rheumatica (11%), panuveitis (11%) and ANCA vasculitis MPO specificity (11%). All of them required admission although the majority showed a favorable evolution, except one of the patient. which resulted in death, in which case in addition to lupus he presented with prostate cancer. Regarding the baseline treatment of these patients, 7 underwent treatment with synthetic DMARDs and three with biological DMARDs (1 Adalimumab, 1 Infliximab and 1 Rituximab) As a result of the listeria infection, most of them had fever or digestive symptoms and two of they experienced neurological manifestations (meningoencephalitis) None of these last two (with lupus and RA) had biological DMARDs.Conclusion:Listeriosis is an uncommon but potentially serious infection usually in older people, pregnant women and immunocompromised patients. In our sample, 33% of the patients were immunocompromised. Of the 9 patients. affected by listeria with rheumatic disease we find a death for meningoencephalitis. Given the impact of this infection in immunosuppressed patients should pay attention in our patients with fever and neurological manifestations.Reference:[1]Eleftherios Mylonakis et al. A Case Series and Review of 222 Cases. Medicine 2002; 81: 260-269.[2]Alcoba Lez M et al.Meningitis por Listeria monocytogenes en el adulto en España. Presentación de 10 casos y revisión de la literatura. Rev Clin Esp 2002; 202 (12): 638-643.[3]Eleftherios Mylonakis et al. Central Nervous Sistem Infection with Listeria monocytogenes. 33 Years’ Experience at a General Hospital and Review of 776 Episodes from tha Literature. Medicine 1998; 77: 313-336.Disclosure of Interests:None declared
Pneumonia byListeria monocytogenes: A Common Infection by an Uncommon Pathogen