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Thilini Piushani Keerthirathne, Dhammika Nayoma Magana-Arachchi, Dushantha Madegedara, Suneth Sithumini Sooriyapathirana
BACKGROUND: Mycobacteria have a spectrum of virulence and different susceptibilities to antibiotics. Distinguishing mycobacterial species is vital as patients with non-tuberculous mycobacterial (NTM) infections present clinical features that are similar to those of patients with tuberculosis. Thus, rapid differentiation of Mycobacterium tuberculosis complex from NTM is critical to administer appropriate treatment. Hence the aim of the study was to rapid identification of mycobacterial species present in bronchial washings using multiplex real time Polymerase Chain Reaction (PCR) and to determine the drug susceptibility in identified mycobacterial species...
October 26, 2016: BMC Infectious Diseases
Swapnali Sabhapandit, Somasheila I Murthy, Vivek M Singh, Ketaki Gaitonde, Madhumita Gopal, Kerul Marsonia, Shajeera Sajid, Kalpana Babu
PURPOSE: To report the epidemiology of uveitis in two urban centers in South India. METHODS: Case records seen between January 2014 and December 2014 at two tertiary eye centers in South India were retrospectively reviewed. RESULTS: A total of 1123 patients in the study population had uveitis. Anterior uveitis was seen in 48.9%, posterior in 20.5%, intermediate in 17.3%, and panuveitis in 13.3%. Of these cases, 68.4% were acute uveitis. Pediatric uveitis constituted 6...
October 26, 2016: Ocular Immunology and Inflammation
Martin T King, Cesare H Jenkins, Conroy Sun, Colin M Carpenter, Xiaowei Ma, Kai Cheng, Quynh-Thu Le, John B Sunwoo, Zhen Cheng, Guillem Pratx, Lei Xing
PURPOSE: Flexible radioluminescence imaging (Flex-RLI) is an optical method for imaging (18)F-fluorodeoxyglucose (FDG)-avid tumors. The authors hypothesize that a gadolinium oxysulfide: terbium (GOS:Tb) flexible scintillator, which loosely conforms to the body contour, can enhance tumor signal-to-background ratio (SBR) compared with RLI, which utilizes a flat scintillator. The purpose of this paper is to characterize flex-RLI with respect to alternative modalities including RLI, beta-RLI (RLI with gamma rejection), and Cerenkov luminescence imaging (CLI)...
October 2016: Medical Physics
Ewa Kasprzycka, Victor A Trush, Vladimir M Amirkhanov, Lucjan Jerzykiewicz, Oscar L Malta, Janina Legendziewicz, Paula Gawryszewska
A series of stable lanthanide complexes Na[Ln(L)4] (Ln = La3+, Eu3+, Gd3+, Tb3+, L = [L1]-, [L2]-), with dimethyl(4-methylphenylsulfonyl)amidophosphate (HL1) and dimethyl 2-naphthylsulfonylamidophosphate (HL2), here denoted as 1Ln, 2Ln, as well as sodium salts, NaL, denoted as 1Na, 2Na were synthesized. The compounds were characterized by single-crystal X-ray diffraction, IR, absorption and emission spectroscopies at 293 and 77 K. In contrast to the usual and well known dominant role of the ligand triplet state in intramolecular energy transfer processes in Ln complexes, in this particular new class of Ln compounds with sulphonylamidophosphate ligands we discuss, for the first time, the strong experimental and detailed theoretical evidences that suggest a dominant role played by the ligand first excited singlet state...
October 25, 2016: Chemistry: a European Journal
Li Liang, Qing Zhang, Liu-Lin Luo, Jun Yue, Yan-Lin Zhao, Min Han, Li-Rong Liu, He-Ping Xiao
OBJECTIVES: Prostaglandin E2 (PGE2) is an important lipid mediator of the inflammatory immune response during acute and chronic infections. PGE2 modulates a variety of immune functions via four receptors (EP1-EP4), which mediate distinct PGE2 effects. Mice lacking EP2 are more susceptible to infection by Mycobacterium tuberculosis (M.tb), have a higher bacterial load, and increase size and number of granulomatous lesions. Our aim was to assess whether single nucleotide polymorphisms (SNPs) in EP2 increase the risk of tuberculosis...
October 22, 2016: Infection, Genetics and Evolution
Gareth Prosser, Julius Brandenburg, Norbert Reiling, Clifton Earl Barry, Robert J Wilkinson, Katalin A Wilkinson
M. tuberculosis is a facultative anaerobe and its characteristic pathological hallmark, the granuloma, exhibits hypoxia in humans and in most experimental models. Thus the host and bacillary adaptation to hypoxia is of central importance in understanding pathogenesis and thereby to derive new drug treatments and vaccines.
October 22, 2016: Microbes and Infection
Tathyana Mar Amorim Franco, Subray S Hegde, John S Blanchard
The biosynthetic pathway of the branched-chain amino acids is essential for M. tuberculosis growth and survival. We report here the kinetic and chemical mechanism of the pyridoxal 5'-phosphate (PLP)-dependent branched-chain aminotransferase, IlvE, from M. tuberculosis (MtIlvE). This enzyme is responsible for the final step of the synthesis of the branched-chain amino acids isoleucine, leucine and valine. As seen in other aminotransferases, MtIlvE displays a ping-pong kinetic mechanism. pK values were identified from the pH dependence on V as well as V/K, indicating that the phosphate ester of the PLP cofactor, as well as the α-amino group from L-glutamate and the active site Lys204, play roles in acid-base catalysis and binding, respectively...
October 25, 2016: Biochemistry
Rein M G J Houben, Peter J Dodd
BACKGROUND: The existing estimate of the global burden of latent TB infection (LTBI) as "one-third" of the world population is nearly 20 y old. Given the importance of controlling LTBI as part of the End TB Strategy for eliminating TB by 2050, changes in demography and scientific understanding, and progress in TB control, it is important to re-assess the global burden of LTBI. METHODS AND FINDINGS: We constructed trends in annual risk in infection (ARI) for countries between 1934 and 2014 using a combination of direct estimates of ARI from LTBI surveys (131 surveys from 1950 to 2011) and indirect estimates of ARI calculated from World Health Organisation (WHO) estimates of smear positive TB prevalence from 1990 to 2014...
October 2016: PLoS Medicine
Anthony M Cadena, Edwin C Klein, Alexander G White, Jaime A Tomko, Chelsea L Chedrick, Douglas S Reed, Laura E Via, Philana Ling Lin, JoAnne L Flynn
Identifying and refining small-animal models of tuberculosis that recapitulate aspects of human Mycobacterium tuberculosis infection can contribute to advancing our understanding of critical facets of the disease. To study the effects of very low-dose infections with 2 strains of M. tuberculosis on disease progression and survival in common marmosets, animals were challenged with strains Erdman and CDC1551 at doses ranging from 1 to 12 cfu. These data revealed that the susceptibility of marmosets to M. tuberculosis infection is influenced by strain virulence and initial dose...
2016: Comparative Medicine
José J Baldoví, Yan Duan, Carlos Bustos, Salvador Cardona-Serra, Pierre Gouzerh, Richard Villanneau, Geoffrey Gontard, Juan M Clemente-Juan, Alejandro Gaita-Ariño, Carlos Giménez-Saiz, Anna Proust, Eugenio Coronado
Polyoxometalate (POM) chemistry has recently offered excellent examples of single ion magnets (SIMs) and molecular spin qubits. Compared with conventional coordination compounds, POMs provide rigid and highly symmetric coordination sites. However, all POM-based SIMs reported to date exhibit a very limited range of possibilities for chemical processability. We present herein two new families of POM-based SIMs which are soluble in organic solvents: [Ln(β-Mo8O26)2](5-) {Ln(III) = Tb, Dy, Ho, Er, Tm and Yb} and the functionalised POMs [Ln{Mo5O13(OMe)4NNC6H4-p-NO2}2](3-) {Ln(III) = Tb, Dy, Ho, Er, Yb and Nd}...
October 25, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
S Bacha, M Khemiri, H Racil, S Hantous, N Chaouch, S Cheikhrouhou, A Chabbou, M L Megdiche
INTRODUCTION: The features of paradoxical reactions (PR) that occurred in non-HIV infected patients are rare and not well known. CASE REPORT: The authors reported the case of a 21years old, non-immunocompromised, and HIV negative patient treated for disseminated tuberculosis. PR occurred after 8months after initiation of antituberculous treatment. PR presented as left cervical lymphadenopathy, pulmonary, pleural, costal and spinal location of the tuberculosis. The antituberculous drugs were prolonged...
October 21, 2016: Revue de Pneumologie Clinique
Z Koné, G Coulibaly, A T J Daix, A S Bakayoko, K Samaké, D P Kouassi, K M S Domoua
INTRODUCTION: The National tuberculosis program (NTP) in Ivory Coast recommends that children under 5 years living in a family environment with contagious tuberculosis patients, should receive Prophylactic treatment with INH (PTI), whatever the result of the tuberculin skin test (positive or negative) and their BCG status (vaccinated or not), at a dose of 5mg/kg/day for 6 months. We conducted this study to check the implementation of this recommendation in three support services of tuberculosis in Abidjan, the economic capital...
October 21, 2016: Revue de Pneumologie Clinique
L Petrone, A Cannas, V Vanini, G Cuzzi, F Aloi, M Nsubuga, J Sserunkuma, R A Nazziwa, L Jugheli, T Lukindo, E Girardi, A Antinori, L Pucci, K Reither, D Goletti
SETTING: Blood interferon-γ inducible protein 10 (IP-10) has been proposed as a biomarker of disease activity for both tuberculosis (TB) and human immunodeficiency virus (HIV) infection. Urine IP-10 has been detected in adults with active TB, and its level decreases after successful anti-tuberculosis treatment. OBJECTIVE: To evaluate blood and urine IP-10 as biomarker of disease activity. DESIGN: Patients with HIV-TB and active TB were enrolled...
November 2016: International Journal of Tuberculosis and Lung Disease
R Matsumura, H Igari, T Nakazawa, S Ishikawa, M Tsuyuzaki, K Suzuki, F Yamagishi
SETTING: National hospital for tuberculosis (TB) and rheumatoid arthritis (RA) in Japan. OBJECTIVE: To compare two interferon-γ release assays (IGRAs), QuantiFERON(®)-TB Gold In-Tube (QFT) and T-SPOT(®).TB (T-SPOT), in RA patients for detecting latent tuberculous infection (LTBI). DESIGN: QFT and T-SPOT were conducted concurrently in 230 prospectively enrolled RA patients. RESULTS: There were no active TB patients...
November 2016: International Journal of Tuberculosis and Lung Disease
R Z Pina, K R Caleffi-Ferracioli, P A Z Campanerut-Sá, L D Ghiraldi-Lopez, F R Pavan, V L D Siqueira, R B L Scodro, R F Cardoso
SETTING: Department of Clinical Analysis and Biomedicine, State University of Maringa, Maringa, PR, Brazil. OBJECTIVE: To evaluate the performance of the resazurin microtiter assay (REMA) plate at pH 5.5 in detecting Mycobacterium tuberculosis susceptibility to pyrazinamide (PZA). DESIGN: The minimal inhibitory concentration (MIC) of PZA in M. tuberculosis H37Rv and M. bovis AN5 reference strains and in 34 clinical M. tuberculosis isolates (26 PZA-susceptible and eight PZA-resistant) was determined using REMA at pH 5...
November 2016: International Journal of Tuberculosis and Lung Disease
O Zewdie, A Mihret, G Ameni, A Worku, T Gemechu, T Abebe
BACKGROUND: In Ethiopia, one of the world's 22 high tuberculosis (TB) burden countries, one third of the tuberculosis (TB) cases are attributed to tuberculosis lymphadenitis (TBLN). However, information on the molecular type of the mycobacterial species and strains that cause TBLN in the country is scarce. OBJECTIVE: To identify the species and strains of mycobacteria that cause TBLN in Ethiopia. METHODS AND RESULTS: A cross-sectional study was conducted among 206 presumed TBLN cases to characterise positive culture isolates...
November 2016: International Journal of Tuberculosis and Lung Disease
L M M Iglecias, M A M Puga, M A Pompílio, S A Teles, J Croda, L A Lima, B V Lago, R M B Martins, A R C Motta-Castro
BACKGROUND: Due to environmental and social conditions inherent to incarceration, tuberculosis (TB) and hepatitis B virus (HBV) are major diseases among prison inmates. OBJECTIVE: To determine overall and occult HBV infection (OBI) prevalence rates, risk factors and genotype distribution among inmates with active TB. STUDY DESIGN: A cross-sectional study was conducted among 216 inmates with active TB recruited at the largest prisons in Campo Grande, Mato Grosso do Sul, Central Brazil...
November 2016: International Journal of Tuberculosis and Lung Disease
A L Lopez, J G Aldaba, C G Ama, P G Sylim, X D Geraldino, J N Sarol, A M Salonga
SETTING: Estimates of the tuberculosis (TB) burden in the Philippines are largely dependent on prevalence surveys. OBJECTIVE: To conduct a prospective community-based survey to generate epidemiological data on TB among patients seeking care in public health centres in a rural municipality in the Philippines. DESIGN: Prospective surveillance and follow-up of presumptive TB cases from May 2013 to July 2015. RESULTS: Of 1622 participants with presumptive TB, 468 (28...
November 2016: International Journal of Tuberculosis and Lung Disease
D J Mibei, J W Kiarie, A Wairia, M Kamene, M E Okumu
SETTING: Successful treatment of drug-resistant tuberculosis (DR-TB) is crucial in preventing disease transmission and reducing related morbidity and mortality. A standardised DR-TB treatment regimen is used in Kenya. Although patients on treatment are monitored, no evaluation of factors affecting treatment outcomes has yet been performed. OBJECTIVE: To analyse treatment outcomes of DR-TB patients in Kenya and factors associated with successful outcome. DESIGN: Retrospective analysis of secondary data from Kenya's National Tuberculosis, Leprosy and Lung disease programme...
November 2016: International Journal of Tuberculosis and Lung Disease
A T Cruz, A L Hersh, J R Starke, S E Beekmann, P M Polgreen, R Banerjee
OBJECTIVE: To evaluate the extent to which advancements in the diagnosis and treatment of latent tuberculous infection (LTBI) have been integrated into practice by pediatric infectious disease (PID) specialists. DESIGN: We conducted an online survey of the Infectious Diseases Society of America's Emerging Infections Network (EIN) membership. RESULTS: Of the 323 members, 197 (61%) responded: 7% cared for ⩾5 children with TB disease and 34% for ⩾5 children with LTBI annually...
November 2016: International Journal of Tuberculosis and Lung Disease
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