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https://www.readbyqxmd.com/read/28522322/imaging-macropinosomes-during-shigella-infections
#1
REVIEW
Noelia Lopez-Montero, Yuen-Yan Chang, Anna Sartori-Rupp, Sonja Kühn, Jost Enninga
Macropinocytosis is the uptake of extracellular fluid within vesicles of varying size that takes place during numerous cellular processes in a large variety of cells. A growing number of pathogens, including viruses, parasites, and bacteria are known to induce macropinocytosis during their entry into targeted host cells. We have recently discovered that the human enteroinvasive, bacterial pathogen Shigella causes in situ macropinosome formation during its entry into epithelial cells. These infection-associated macropinosomes are not generated to ingest the bacteria, but are instead involved in Shigella's intracellular niche formation...
May 15, 2017: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/28518039/central-nervous-system-brucellosis-granuloma-and-white-matter-disease-in-immunocompromised-patient
#2
Mohammed Alqwaifly, Fahad S Al-Ajlan, Hindi Al-Hindi, Abdulaziz Al Semari
Brucellosis is a multisystem zoonotic disease. We report an unusual case of neurobrucellosis with seizures in an immunocompromised patient in Saudi Arabia who underwent renal transplantation. Magnetic resonance imaging of the brain showed diffuse white matter lesions. Serum and cerebrospinal fluid were positive for Brucella sp. Granuloma was detected in a brain biopsy specimen.
June 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28518028/brucella-neotomae-infection-in-humans-costa-rica
#3
Marcela Suárez-Esquivel, Nazareth Ruiz-Villalobos, César Jiménez-Rojas, Elías Barquero-Calvo, Carlos Chacón-Díaz, Eunice Víquez-Ruiz, Norman Rojas-Campos, Kate S Baker, Gerardo Oviedo-Sánchez, Ernesto Amuy, Esteban Chaves-Olarte, Nicholas R Thomson, Edgardo Moreno, Caterina Guzmán-Verri
Several species of Brucella are known to be zoonotic, but B. neotomae infection has been thought to be limited to wood rats. In 2008 and 2011, however, B. neotomae was isolated from cerebrospinal fluid of 2 men with neurobrucellosis. The nonzoonotic status of B. neotomae should be reassessed.
June 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28508154/estimating-loss-of-brucella-abortus-antibodies-from-age-specific-serological-data-in-elk
#4
J A Benavides, D Caillaud, B M Scurlock, E J Maichak, W H Edwards, P C Cross
Serological data are one of the primary sources of information for disease monitoring in wildlife. However, the duration of the seropositive status of exposed individuals is almost always unknown for many free-ranging host species. Directly estimating rates of antibody loss typically requires difficult longitudinal sampling of individuals following seroconversion. Instead, we propose a Bayesian statistical approach linking age and serological data to a mechanistic epidemiological model to infer brucellosis infection, the probability of antibody loss, and recovery rates of elk (Cervus canadensis) in the Greater Yellowstone Ecosystem...
May 15, 2017: EcoHealth
https://www.readbyqxmd.com/read/28506887/molecular-investigation-of-virulence-factors-of-brucella-melitensis-and-brucella-abortus-strains-isolated-from-clinical-and-non-clinical-samples
#5
Reza Mirnejad, Faramarz Masjedian Jazi, Shayan Mostafaei, Mansour Sedighi
Brucella is zoonotic pathogen that induces abortion and sterility in domestic mammals and chronic infections in humans called Malta fever. It is a facultative intracellular potential pathogen with high infectivity. The virulence of Brucella is dependent upon its potential virulence factors such as enzymes and cell envelope associated virulence genes. The aim of this study was to investigate the Brucella virulence factors among strains isolated from humans and animals in different parts of Iran. Seventy eight strains of Brucella species isolated from suspected human and animal cases from several provinces of Iran during 2015-2016 and identified by phenotypic and molecular methods...
May 12, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28506316/characterization-of-novel-omp31-antigenic-epitopes-of-brucella-melitensis-by-monoclonal-antibodies
#6
Jinfeng Li, Feihuan Hu, Shouyi Chen, Peifang Luo, Zuoping He, Wenjing Wang, Jean-Pierre Allain, Chengyao Li
BACKGROUND: Brucellosis is a severe zoonotic disease worldwide. Detection and identification of Brucella species are essential to prevent or treat brucellosis in humans and animals. The outer membrane protein-31 (Omp31) is a major protein of Brucellae except for B. abortus, while the Omp31 antigenic epitopes have not been extensively characterized yet. RESULTS: A total of 22 monoclonal antibodies (mAbs) were produced against Omp31 of Brucella (B.) melitensis, of which 13 recognized five linear epitopes, 7 reacted with semi-conformational epitopes and 2 reacted with conformational epitopes, respectively...
May 15, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28502643/are-brucellosis-q-fever-and-melioidosis-potential-causes-of-febrile-illness-in-madagascar
#7
Ides Boone, Klaus Henning, Angela Hilbert, Heinrich Neubauer, Vera von Kalckreuth, Denise Myriam Dekker, Norbert Georg Schwarz, Gi Deok Pak, Andreas Krüger, Ralf Matthias Hagen, Hagen Frickmann, Jean Noël Heriniaina, Raphael Rakotozandrindrainy, Jean Philibert Rakotondrainiarivelo, Tsiry Razafindrabe, Benedikt Hogan, Jürgen May, Florian Marks, Sven Poppert, Sascha Al Dahouk
Brucellosis, Q fever and melioidosis are zoonoses, which can lead to pyrexia. These diseases are often under-ascertained and underreported because of their unspecific clinical signs and symptoms, insufficient awareness by physicians and public health officers and limited diagnostic capabilities, especially in low-resource countries. Therefore, the presence of Brucella spp., Coxiella burnetii and Burkholderia pseudomallei was investigated in Malagasy patients exhibiting febrile illness. In addition, we analyzed zebu cattle and their ticks as potential reservoirs for Brucella and C...
May 11, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28494705/brucellosis-in-endangered-hector-s-dolphins-cephalorhynchus-hectori
#8
K Buckle, W D Roe, L Howe, S Michael, P J Duignan, E Burrows, H Ha, S Humphrey, W L McDonald
Brucella spp infections of marine mammals are often asymptomatic but have been associated with reproductive losses and deaths. Zoonotic infections originating from marine isolates have also been described. Hector's dolphins (Cephalorhynchus hectori) are an endangered species with a declining population, and the role of infectious disease in population dynamics is not fully understood. In this study, 27 Hector's dolphins found dead around the New Zealand coastline between November 2006 and October 2010 were evaluated for lesions previously associated with cetacean brucellosis...
January 1, 2017: Veterinary Pathology
https://www.readbyqxmd.com/read/28482164/brucella-melitensis-m5-90%C3%A2-bp26-as-a-potential-live-vaccine-that-allows-for-the-distinction-between-natural-infection-and-immunization
#9
Tiansen Li, Zhixia Tong, Meiling Huang, Liyan Tang, Hui Zhang, Chuangfu Chen
Brucella is Gram-negative intracellular bacterial pathogen that infects humans and animals and contributes to great economic losses in developing countries. Presently, live attenuated Brucella vaccines (B. melitensis strain M5-90) are the most effective means of brucellosis control and prevention in animals. However, these vaccines have several drawbacks, such as an inability to distinguish between a natural infection and immunization and an association with abortions in pregnant animals. Therefore, this study constructed a Brucella M5-90△bp26 mutant and evaluated its virulence...
May 8, 2017: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/28480256/a-case-report-of-pediatric-brucellosis-in-an-algerian-immigrant
#10
Eimear Kitt, Kristina R Brannock, Lauren A VonHolz, Paul J Planet, Erin Graf, Vinodh Pillai
An 8-year old girl presented to our facility with a 10-day history of fever, fatigue, abdominal pain and refusal to walk. She recently travelled from her native Algeria where she first developed symptoms. On evaluation, she was ill-appearing, febrile and tachycardic with hepatosplenomegaly and lymphadenopathy noted on examination. A strong musty odor was also noted from the child. Laboratory evaluation revealed pancytopenia, hyponatremia, and an elevated AST, ALT, and LDH. Malaria testing was negative, as was a PPD...
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/28479744/high-throughput-virtual-screening-to-identify-novel-natural-product-inhibitors-for-methionyltrna-synthetase-of-brucella-melitensis
#11
Madhulata Kumari, Subhash Chandra, Neeraj Tiwari, Naidu Subbarao
The Brucella melitensis methionyl-tRNA-synthetase (MetRSBm) is a promising target for brucellosis drug development. The virtual screening of large libraries of a drug like molecules against a protein target is a common strategy used to identify novel inhibitors. A High throughput virtual screening was performed to identify hits to the potential antibrucellosis drug target, MetRSBm. The best inhibitor identified from the literature survey was 1312, 1415, and 1430. In the virtual screening 56,400 compounds of ChEMBL antimycobacterial library, 1596 approved drugs, 419 Natural product IV library, and 2396 methionine analogous were docked and rescoring, identified top 10 ranked compounds as anti-mycobacterial leads showing G-scores -10...
2017: Bioinformation
https://www.readbyqxmd.com/read/28473914/isolated-splenic-abscess-in-brucellosis
#12
Sreenivasa Rao Sudulagunta, Monica Kumbhat, Mahesh Babu Sodalagunta, Aravinda Settikere Nataraju, Shiva Kumar Bangalore Raja
Brucellosis is a zoonotic infectious disease, which can attack any organ of the body but mainly involves lymphoreticular system. Our case report describes isolated splenic abscess diagnosed in a 50-year-old individual who is a milk vendor by occupation and has the habit of consuming raw milk. He was admitted with pain abdomen, high-grade fever with chills, generalized malaise, night sweats and weight loss. Ultrasound and computerized tomography of the abdomen showed splenomegaly and hypodense, nonenhancing lesion measuring 3...
February 2017: Oxford Medical Case Reports
https://www.readbyqxmd.com/read/28470362/pathogen-exposure-in-cattle-at-the-livestock-wildlife-interface
#13
Malavika Rajeev, Mathew Mutinda, Vanessa O Ezenwa
Land use is an important driver of variation in human infectious disease risk, but less is known about how land use affects disease risk in livestock. To understand how land use is associated with disease risk in livestock, we examined patterns of pathogen exposure in cattle across two livestock ranching systems in rural Kenya: private ranches with low- to medium-intensity cattle production and high wildlife densities, and group ranches with high-intensity cattle production and low wildlife densities. We surveyed cattle from six ranches for three pathogens: Brucella spp...
May 3, 2017: EcoHealth
https://www.readbyqxmd.com/read/28466240/incidence-and-knowledge-of-bovine-brucellosis-in-kahuro-district-murang-a-county-kenya
#14
Janeffer N Njuguna, Michael M Gicheru, Lucy M Kamau, Peter M Mbatha
Brucellosis in cattle is a zoonosis mainly caused by Brucella abortus. In Kenya, the disease is widespread, but its prevalence is largely unknown. The objective of this study was to investigate incidence rates of brucellosis and farmers' knowledge on the disease in Kahuro district, Murang'a County. In this study, 150 pooled milk samples were collected from 75 milk collection centers and tested. Subsequently, 230 milk samples were collected from farmers in 16 collection centers in Wangu and Mugoiri divisions whose pooled samples gave positive results...
May 3, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28460642/multi-locus-variable-number-tandem-repeat-analysis-of-chinese-brucella-strains-isolated-from-1953-to-2013
#15
Guo-Zhong Tian, Bu-Yun Cui, Dong-Ri Piao, Hong-Yan Zhao, Lan-Yu Li, Xi Liu, Pei Xiao, Zhong-Zhi Zhao, Li-Qing Xu, Hai Jiang, Zhen-Jun Li
BACKGROUND: Brucellosis was a common human and livestock disease caused by Brucella strains, the category B priority pathogens by the US Center for Disease Control (CDC). Identified as a priority disease in human and livestock populations, the increasing incidence in recent years in China needs urgent control measures for this disease but the molecular background important for monitoring the epidemiology of Brucella strains at the national level is still lacking. METHODS: A total of 600 Brucella isolates collected during 60 years (from 1953 to 2013) in China were genotyped by multiple locus variable-number tandem repeat analysis (MLVA) and the variation degree of MLVA11 loci was calculated by the Hunter Gaston Diversity Index (HGDI) values...
May 2, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28459811/the-clinical-features-of-590-patients-with-brucellosis-in-xinjiang-china-with-the-emphasis-on-the-treatment-of-complications
#16
Bin Jia, Fengbo Zhang, Ying Lu, Wenbao Zhang, Jun Li, Yuexin Zhang, Jianbing Ding
BACKGROUND: This study aims to analyze the clinical characteristics and treatment outcomes of 590 patients with brucellosis in Xinjiang, China. METHODOLOGY AND PRINCIPAL FINDINGS: The clinical characteristics, laboratory findings, complications and prognosis of 590 patients infected with brucellosis were retrospectively analyzed. These patients had a mean age of 44.24 ± 15.83 years with 60.5% having a history of close contacting with cattle and sheep. Of them, 53...
May 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28456876/seroprevalence-of-brucella-antibodies-in-camels-in-katsina-state-nigeria
#17
U S Salisu, C A Kudi, J O O Bale, M Babashani, B Y Kaltungo, S N A Saidu, A Asambe, A Y Baba
A cross-sectional study was carried out to determine the status of Brucella infection in one-humped (Dromedary) camels in the North and Central senatorial districts of Katsina State, Nigeria. Nine hundred and eighty serum samples from live and slaughtered camels were tested. Modified Rose Bengal plate test (RBPT) and serum agglutination test (SAT) with ethylenediaminetetraacetic acid, (EDTA) were used as screening and standard tests, respectively. The prevalence of Brucella antibodies were 110 (11.2%) and 103 (10...
April 29, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28452907/in-a-mouse-model-of-sepsis-hepcidin-ablation-ameliorates-anemia-more-effectively-than-iron-and-erythropoietin-treatment
#18
Eeman Khorramian, Eileen Fung, Kristine Chua, Victoria Gabayan, Tomas Ganz, Elizabeta Nemeth, Airie Kim
Intensive Care Unit (ICU) anemia is an extreme version of anemia of inflammation (AI) that occurs commonly in critically ill patients and is associated with increased morbidity and mortality. Currently available therapies for ICU anemia have shown inconsistent efficacies in clinical trials. We conducted a systematic study of the effects of early versus delayed iron (Fe) and/or erythropoietin (EPO) therapy in our previously characterized mouse model of ICU anemia based on an injection of heat-killed Brucella abortus (BA)...
April 27, 2017: Shock
https://www.readbyqxmd.com/read/28443393/cd14-gene-silencing-alters-the-microrna-expression-profile-of-raw264-7-cells-stimulated-by-brucella-melitensis-infection
#19
Hui Rong, Hanwei Jiao, Yongchang Hao, Feng Pang, Guohua Li, Dongmei Peng, Yaying Li, Yuanzhi Wang, Hui Zhang, Quanshui Fan, Fengyang Wang, Chuangfu Chen, Li Du
Innate recognition of Brucella spp. is a key step in the activation of inflammation. CD14 binds PAMPs and is involved in LPS-induced pro-inflammatory cytokine release. Previously we showed that knock down of CD14 in RAW264.7 macrophages disrupted Brucella-host interactions. However, its effect on the macrophage microRNA (miRNA) expression profile, especially after stimulation by Brucella infection, is still unclear. To identify miRNAs involved in the macrophage response to Brucella infection, we performed miRNA expression profiling of CD14 knock-down RAW264...
January 1, 2017: Innate Immunity
https://www.readbyqxmd.com/read/28443226/a-novel-pcr-assay-for-detecting-brucella-abortus-and-brucella-melitensis
#20
Saeed Alamian, Majid Esmaelizad, Taghi Zahraei, Afshar Etemadi, Mohsen Mohammadi, Davoud Afshar, Soheila Ghaderi
OBJECTIVES: Brucellosis is a major zoonotic disease that poses a significant public health threat worldwide. The classical bacteriological detection process used to identify Brucella spp. is difficult and time-consuming. This study aimed to develop a novel molecular assay for detecting brucellosis. METHODS: All complete sequences of chromosome 1 with 2.1-Mbp lengths were compared among all available Brucella sequences. A unique repeat sequence (URS) locus on chromosome 1 could differentiate Brucella abortus from Brucella melitensis...
February 2017: Osong Public Health and Research Perspectives
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