Listeria Monocytogenes Meningitis in an Immunocompetent Patient.

Listeria monocytogenes (LM), one of the most important foodborne pathogens, is an intracellular bacterium found in food and the environment. It causes listeriosis, a potentially severe disease, particularly for pregnant women, the elderly and immunocompromised patients, but in rare cases, it can cause invasive disease in immunocompetent adults and children. Community-acquired bacterial meningitis caused by LM is rare and difficult to diagnose. It carries a high mortality rate; therefore, it is essential to start appropriate antibiotic treatment as soon as possible. The first case of LM meningitis identified in our hospital over the last 10 years is that of a previously healthy 45-year-old man who presented in the emergency department with a 4-day history of diplopia, left eye medial deviation and left palpebral ptosis, with no history of fever, headache or gastrointestinal symptoms. Because of the atypical symptoms, a suspicion of meningitis vs cerebral aneurysm was raised during the admission process. The patient was diagnosed with LM meningitis and recovered fully after appropriate antibiotic treatment. The purpose of this article is to emphasise the possibility of LM invasive disease (in this case meningitis) occurring in previously healthy individuals and to raise awareness about the need for LM to be considered in the differential diagnosis of atypical presentations.

The encapsulation effect of UV molecular absorbers into biocompatible lipid nanoparticles.

The efficiency of a cosmetic product depends not only on the active ingredients, but also on the carrier system devoted to improve its bioavailability. This article aims to encapsulate two couples of UV molecular absorbers, with a blocking action on both UV-A and UV-B domains, into efficient lipid nanoparticles. The effect of encapsulation on the specific properties such as sun protection factor and photostability behaviour has been demonstrated. The lipid nanoparticles with size range 30-350 nm and a polydispersity index between 0.217 and 0.244 are obtained using a modified high shear homogenisation method. The nanoparticles had spherical shapes with a single crystallisation form of lipid matrices characteristic for the least ordered crystal structure (α-form). The in vitro determination of photoprotection has led to high SPF ratings, with values of about 20, which assure a good photoprotection and filtering about 95% of UV radiation. The photoprotection effect after irradiation stage was observed to be increased more than twice compared to initial samples as a result of isomerisation phenomena. All the results have shown that good photoprotection effect and improved photostability could be obtained using such sunscreen couples, thus demonstrating that UV absorbers-solid lipid nanoparticles are promising carriers for cosmetic formulations.