ABSTRACT
Infection with multidrug resistant bacteria is a significant public health concern. Bacteria culture of water samples (n=120) collected in San Cristobal River, Philippines, showed that half (n=60) were positive for Salmonella spp. Screening of all isolates (n=179) for susceptibility to antibiotics showed that most (76.4%; n=113) were positive for class 1 integrons, of which one isolate was also positive for the class 2 integron. The presence of class 1 integrons was associated with resistance to antibiotics (p<0.05). Sequencing of class 1 integron variable regions (VRs) differeciated 11 gene cassettes: dfrA1 or dfrA17; aadA1 or aadA2; blaCTX-M-2 or bla-OXA-1; SmdAB; CmlA1 and aaC 3-Id. However, sequencing of class 2 integron VR differenciated estX, sat2, and aadA1. These results provide insights into evolutionary changes within bacterial multidrug resistant cassettes, more accurately to estimate heath risk associated with the river water. .
ABSTRACT
A novel cycloartanol (1) and an acylated Sutherlandioside D (2) together with two known cycloartane derivatives, Sutherlandioside B (3) and Sutherlandioside A (4), were isolated from the aerial parts of Sutherlandia frutescens. The structures of these compounds were established by a combination of 1- and 2-D NMR techniques and further confirmed by high resolution ToF mass spectrometry (HRToFMS). Preliminary biological studies were also conducted to assess the activity of different plant extracts, fractions and compounds on cytokine expression. Compounds 1 and 2 prompted an increase in IL-6 expression while compound 4 showed a reduced IL-6 expression compared to the controls. Compound 1 is an effective suppressor of IL-10 expression. The plant compounds inhibited the expression of the two cytokines, IL-10 and TNFα. The results of the assays suggested that some components in the plant extract influence the immune system by suppressing the expression of IL-6, IL-10 and TNFα.
Subject(s)
Cytokines/metabolism , Fabaceae/chemistry , Immunologic Factors/chemistry , Immunologic Factors/pharmacology , Drug Evaluation, Preclinical , Fabaceae/metabolism , Humans , Magnetic Resonance Spectroscopy , Mass Spectrometry , Molecular Structure , Plant Extracts/chemistry , Plant Extracts/pharmacology , Plants, Medicinal/chemistry , Triterpenes/chemistryABSTRACT
BACKGROUND: Rotavirus is considered worldwide as one of the most important viral gastrointestinal infections, resulting in potentially life-threatening diarrhoea and death in children under the age of 5 years. Rotavirus can survive and remain infectious for long periods outside of the human body and can be easily transmitted via environmental surfaces. METHOD: Stool specimens that had been collected and stored since 2010/2011 at 2°C - 8°C instead of -20°C or -80°C were analysed to determine the viability of rotavirus in these specimens after 6 years of improper storage. The specimens were analysed using simple enzyme immunoassay (EIA) methods from two different suppliers at different times throughout the period (2012-2017). RESULTS: The analysis showed similar detection results for the two EIA kits. CONCLUSION: The rotavirus can be detected after several years of incorrect storage with EIA kits.