Detection of influenza virus in air samples of patient rooms.

BACKGROUND: Understanding the transmission and dispersal of influenza virus and respiratory syncytial virus (RSV) via aerosols is essential for the development of preventative measures in hospital environments and healthcare facilities. METHODS: During the 2017-2018 influenza season, patients with confirmed influenza or RSV infections were enrolled. Room air samples were collected close (0.30 m) to and distant (2.20 m) from patients' heads. Real-time polymerase chain reaction was used to detect and quantify viral particles in the air samples. The plaque assay was used to determine the infectiousness of the detected viruses. FINDINGS: Fifty-one air samples were collected from the rooms of 29 patients with laboratory-confirmed influenza; 51% of the samples tested positive for influenza A virus (IAV). Among the IAV-positive patients, 65% were emitters (had at least one positive air sample), reflecting a higher risk of nosocomial transmission compared with non-emitters. The majority (61.5%) of the IAV-positive air samples were collected 0.3 m from a patient's head, while the remaining IAV-positive air samples were collected 2.2 m from a patient's head. The positivity rate of IAV in air samples was influenced by distance from the patient's head and day of sample collection after hospital admission. Only three patients with RSV infection were recruited and none of them were emitters. CONCLUSION: Influenza virus can be aerosolized beyond 1 m in patient rooms, which is the distance considered to be safe by infection control practices. Further investigations are needed to determine the extent of infectivity of aerosolized virus particles.

G protein-coupled oestrogen receptor 1, oestrogen receptors and androgen receptor in the sand rat (Psammomys obesus) efferent ducts.

BACKGROUND: The efferent ducts are mainly involved in the reabsorption of the seminiferous tubular fluid. Testosterone and oestrogens regulate efferent ducts functions via their receptors. MATERIALS AND METHODS: This paper presents an experimental investigation on the location of the P450 aromatase, the 17-b oestradiol (E2), the androgen receptor (AR), the oestrogen receptor 1 (ESR1), the oestrogen receptor 2 (ESR2) and the G protein-coupled oestrogen receptor 1 (GPER1) in the efferent ducts using Psammomys obesus as an animal model to highlight the effect of the season on the histology and the distribution of these receptors. RESULTS: We observed a proliferation of the connective tissue, decreasing in the height of the epithelium during the resting season compared to the breeding season. Ciliated cells expressed P450 aromatase, AR, E2, ESR1, ESR2 and GPER1 during both seasons. Basal cells showed a positive staining for the ESR1 and the GPER1 during both season, the AR and E2 during the breeding season and ESR2 during the resting season. CONCLUSIONS: Our result shows that the expression of androgen receptor and oestrogen receptors in the efferent ducts vary by season witch suggest that they are largely involved in the regulation of the efferent ducts functions.

Beneficial role of vanillin, a polyphenolic flavoring agent, on maneb-induced oxidative stress, DNA damage, and liver histological changes in Swiss albino mice.

Vanillin, a widely used flavoring agent, has antimutagenic and antioxidant properties. The current study was performed to evaluate its beneficial role against hepatotoxicity induced by maneb, a dithiocarbamate fungicide. Mice were divided into four groups of six each: group 1, serving as negative controls which received by intraperitoneal way only distilled water, a solvent of maneb; group 2, received daily, by intraperitoneal way, maneb (30 mg kg-1 body weight (BW)); group 3, received maneb at the same dose of group 2 and 50 mg kg-1 BW of vanillin by intraperitoneal way; and group 4, serving as positive controls, received daily only vanillin. After 10 days of treatment, mice of all groups were killed. Our results showed that vanillin significantly reduced the elevated hepatic levels of malondialdehyde, hydrogen peroxide, and advanced oxidation protein product and attenuated DNA fragmentation induced by maneb. In addition, vanillin modulated the alterations of antioxidant status: enzymatic (superoxide dismutase, catalase, and glutathione peroxidase) and nonenzymatic (reduced glutathione, nonprotein thiol, and vitamin C) antioxidants in the liver of maneb-treated mice. This natural compound was also able to ameliorate plasma biochemical parameters (aspartate aminotransferase, alanine aminotransferase, gamma glutamyl transpeptidase, alkaline phosphatase, total bilirubin, and total protein). The protective effect of vanillin was further evident through the histopathological changes produced by maneb in the liver tissue. Thus, we concluded that vanillin might be beneficial against maneb-induced hepatic damage in mice.

Penconazole alters redox status, cholinergic function, and membrane-bound ATPases in the cerebrum and cerebellum of adult rats.

Pesticides exposure causes usually harmful effects to the environment and human health. The present study aimed to investigate the potential toxic effects of penconazole, a triazole fungicide, on the cerebrum and cerebellum of adult rats. Penconazole was administered intraperitoneally to male Wistar rats at a dose of 67 mg kg-1 body weight every 2 days during 9 days. Results showed that penconazole induced oxidative stress in rat cerebrum and cerebellum tissues. In fact, we have found a significant increase in malondialdehyde, hydrogen peroxide, and advanced oxidation protein product levels, as well as an alteration of the antioxidant status, enzymatic (superoxide dismutase and catalase) and nonenzymatic (glutathione), the cholinergic function, and membrane-bound ATPases (Na+/K+-ATPase and Mg2+-ATPase). Penconazole also provoked histological alterations marked by pyknotic and vacuolated neurons in the cerebrum and apoptosis and edema in the cerebellum Purkinje cells' layer. Therefore, the use of this neurotoxicant fungicide must be regularly monitored in the environment.

Characterization of influenza outbreaks in Lebanon during the 2013/14 and 2014/15 seasons.

Despite the significant burden of influenza outbreaks, active disease monitoring has been largely absent in the Middle East, including Lebanon. In this study we characterized influenza virus in 440 nasopharyngeal swabs collected from patients with acute respiratory infections during two influenza seasons in Lebanon. Influenza A(H3N2) was dominant in the 2013/14 season while the A(H1N1)pdm09 and B/Yamagata strains were most prevalent in the 2014/15 season. All tested isolates were susceptible to 4 neuraminidase inhibitors (oseltamivir, zanamivir, peramivir and laninamivir). Genetic analysis of the haemagglutinin gene revealed multiple introductions of influenza viruses into Lebanon from different geographic sources during each season. Additionally, large data gaps were identified in the Middle East region, as indicated by the lack of current influenza sequences in the database from many countries in the region.

Characterization of influenza outbreaks in Lebanon during the 2013/14 and 2014/15 seasons

Despite the significant burden of influenza outbreaks, active disease monitoring has been largely absent in the Middle East, including Lebanon. In this study we characterized influenza virus in 440 nasopharyngeal swabs collected from patients with acute respiratory infections during two influenza seasons in Lebanon. Influenza A[H3N2] was dominant in the 2013/14 season while the A[H1N1]pdm09 and B/Yamagata strains were most prevalent in the 2014/15 season. All tested isolates were susceptible to 4 neuraminidase inhibitors [oseltamivir, zanamivir, peramivir and laninamivir]. Genetic analysis of the haemagglutinin gene revealed multiple introductions of influenza viruses into Lebanon from different geographic sources during each season. Additionally, large data gaps were identified in the Middle East region, as indicated by the lack of current influenza sequences in the database from many countries in the region

Malgré la lourde charge que représentent les flambées de grippe, la surveillance active de la maladie était jusqu'à présent inexistante au Moyen-Orient, et notamment au Liban. Dans la présente étude, le virus de la grippe a été caractérisé dans 440 sécrétions rhinopharyngées prélevées par écouvillonnage chez des patients ayant souffert d'infections respiratoires aiguës pendant deux saisons grippales au Liban. Le virus de la grippe A[H3N2] était prédominant pendant la saison 2013/2014, tandis que celui de la grippe A[H1N1]pdm09 et les souches de grippe B/Yamagata étaient les plus courants pendant la saison 2014/2015. Tous les isolats testés étaient sensibles à quatre inhibiteurs de la neuraminidase [l'oseltamivir, le zanamivir, le peramivir, et le laninamivir]. L'analyse génétique du gène de l'hémagglutinine a révélé de multiples introductions des virus de la grippe au Liban, depuis différentes sources géographiques au cours de chaque saison. De plus, d'importantes lacunes dans les données ont été constatées dans la région du Moyen-Orient, comme le montre l'absence des séquences génétiques actuelles de la grippe dans les bases de données de nombreux pays de la region

Identification of second lipolysis activating protein from scorpion Buthus occitanus tunetanus.

Besides the previously described LVP1, a second protein, LVP2, inducing a lipolytic response in adipose cells, was purified from scorpion Buthus occitanus tunetanus venom. It represented 2% of crude venom proteins, with pHi = 6 and molecular mass of 16889 Da. The reduction and the alkylation of LVP2 revealed an heterodimeric structure. Isolated alpha and beta chains of LVP2 have a molecular weight (MW) of 8822 Da and 8902, respectively. This protein was not toxic to mice and stimulated lipolysis on freshly dissociated rat adipocytes in a dose-dependent manner with EC50 = 2 +/- 0.75 microg/ml. LVP2 subunits did not display any lipolytic activity. As previously described for venom and LVP1, beta adrenergic receptor (beta AR) antagonists interfere with LVP2 activity. Furthermore, it is shown that LVP2 competes with [3H] CGP 12177 (beta1/beta2 AR antagonist) for binding to adipocyte plasma membrane with an IC50 of about 10(-7)M. Thus, these results bring original information on the existence of proteins that are present in scorpion venoms and can exert a distinct biological activity on adipocyte lipolysis through a beta-type adreno-receptor pathway.