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Infectious diseases modelling

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https://www.readbyqxmd.com/read/28747822/beneficial-effect-of-bifidobacterium-longum-atcc-15707-on-survival-rate-of-clostridium-difficile-infection-in-mice
#1
Bohyun Yun, Minyu Song, Dong-June Park, Sejong Oh
Clostridium difficile infection (CDI) is the main cause of hospital-acquired diarrhea that can cause colitis or even death. The medical-treatment cost and deaths caused by CDI are increasing annually worldwide. New approaches for prevention and treatment of these infections are needed, such as the use of probiotics. Probiotics, including Bifidobacterium spp. and Lactobacillus, are microorganisms that confer a health benefit to the host when administered in adequate amounts. The effect of Bifidobacterium longum ATCC 15707 on infectious disease caused by C...
2017: Korean Journal for Food Science of Animal Resources
https://www.readbyqxmd.com/read/28747170/spatial-prediction-and-validation-of-zoonotic-hazard-through-micro-habitat-properties-where-does-puumala-hantavirus-hole-up
#2
Hussein Khalil, Gert Olsson, Magnus Magnusson, Magnus Evander, Birger Hörnfeldt, Frauke Ecke
BACKGROUND: To predict the risk of infectious diseases originating in wildlife, it is important to identify habitats that allow the co-occurrence of pathogens and their hosts. Puumala hantavirus (PUUV) is a directly-transmitted RNA virus that causes hemorrhagic fever in humans, and is carried and transmitted by the bank vole (Myodes glareolus). In northern Sweden, bank voles undergo 3-4 year population cycles, during which their spatial distribution varies greatly. METHODS: We used boosted regression trees; a technique inspired by machine learning, on a 10 - year time-series (fall 2003-2013) to develop a spatial predictive model assessing seasonal PUUV hazard using micro-habitat variables in a landscape heavily modified by forestry...
July 26, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28746785/half-the-story-thermal-effects-on-within-host-infectious-disease-progression-in-a-warming-climate
#3
Alexander Stewart, Pascal I Hablützel, Martha Brown, Hayley V Watson, Sophie Parker-Norman, Anya V Tober, Anna G Thomason, Ida M Friberg, Joanne Cable, Joseph A Jackson
Immune defence is temperature-dependent in cold-blooded vertebrates (CBVs) and thus directly impacted by global warming. We asked whether immunity and within-host infectious disease progression are altered in CBVs under realistic climate warming in a seasonal mid-latitude setting. Going further, we also asked how large thermal effects are in relation to the effects of other environmental variation in such a setting (critical to our ability to project infectious disease dynamics from thermal relationships alone)...
July 26, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28746374/spatial-dynamics-and-control-of-a-crop-pathogen-with-mixed-mode-transmission
#4
Christopher Finn McQuaid, Frank van den Bosch, Anna Szyniszewska, Titus Alicai, Anthony Pariyo, Patrick Chiza Chikoti, Christopher Aidan Gilligan
Trade or sharing that moves infectious planting material between farms can, for vertically-transmitted plant diseases, act as a significant force for dispersal of pathogens, particularly where the extent of material movement may be greater than that of infected vectors or inoculum. The network over which trade occurs will then effect dispersal, and is important to consider when attempting to control the disease. We consider the difference that planting material exchange can make to successful control of cassava brown streak disease, an important viral disease affecting one of Africa's staple crops...
July 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28745904/burden-of-skin-and-subcutaneous-diseases-in-iran-and-neighboring-countries-results-from-the-global-burden-of-disease-study-2015
#5
Chante Karimkhani, Robert P Dellavalle, Seyed M Karimi, Vafa Rahimi-Movaghar, Farshad Pourmalek, Aliasghar A Kiadaliri, Mohammad Ali Sahraian, Gholamreza Roshandel, Seyed Mohammad Fereshtehnejad, Mostafa Qorbani, Amir Radfar, Maryam S Farvid, Hamid Asayesh, Sadaf G Sepanlou, Shirin Djalalinia, Amir Kasaeian, Jagdish Khubchandani, Reza Malekzadeh, Maziar Moradi-Lakeh, Kristopher J Krohn, Ali H Mokdad, Theo Vos, Mohsen Naghavi
BACKGROUND: Iran and its neighboring countries represent four world regions with unique cultures and geography. Skin diseases span a wide diversity of etiologies including infectious, inflammatory, autoimmune, vascular, neurogenic, and oncologic. The Global Burden of Disease Study (GBD) 2015 measures the burden from skin diseases in 195 countries. METHODS: Epidemiologic data were collected from literature review, survey data, and hospital inpatient/outpatient claims data...
July 2017: Archives of Iranian Medicine
https://www.readbyqxmd.com/read/28743813/curative-treatment-of-severe-gram-negative-bacterial-infections-by-a-new-class-of-antibiotics-targeting-lpxc
#6
Nadine Lemaître, Xiaofei Liang, Javaria Najeeb, Chul-Jin Lee, Marie Titecat, Emmanuelle Leteurtre, Michel Simonet, Eric J Toone, Pei Zhou, Florent Sebbane
The infectious diseases caused by multidrug-resistant bacteria pose serious threats to humankind. It has been suggested that an antibiotic targeting LpxC of the lipid A biosynthetic pathway in Gram-negative bacteria is a promising strategy for curing Gram-negative bacterial infections. However, experimental proof of this concept is lacking. Here, we describe our discovery and characterization of a biphenylacetylene-based inhibitor of LpxC, an essential enzyme in the biosynthesis of the lipid A component of the outer membrane of Gram-negative bacteria...
July 25, 2017: MBio
https://www.readbyqxmd.com/read/28743489/lipid-profiling-of-the-filarial-nematodes-onchocerca-volvulus-onchocerca-ochengi-and-litomosoides-sigmodontis-reveals-the-accumulation-of-nematode-specific-ether-phospholipids-in-the-host
#7
Vera Wewer, Benjamin L Makepeace, Vincent N Tanya, Helga Peisker, Kenneth Pfarr, Achim Hoerauf, Peter Dörmann
Onchocerciasis, a neglected tropical disease prevalent in western and central Africa, is a major health problem and has been targeted for elimination. The causative agent for this disease is the human parasite Onchocerca volvulus. Onchocerca ochengi and Litomosoides sigmodontis, infectious agents of cattle and rodents, respectively, serve as model organisms to study filarial nematode infections. Biomarkers to determine infection without the use of painful skin biopsies and microscopic identification of larval worms are needed and their discovery is facilitated by an improved knowledge of parasite-specific metabolites...
July 22, 2017: International Journal for Parasitology
https://www.readbyqxmd.com/read/28741177/birth-birth-death-processes-and-their-computable-transition-probabilities-with-biological-applications
#8
Lam Si Tung Ho, Jason Xu, Forrest W Crawford, Vladimir N Minin, Marc A Suchard
Birth-death processes track the size of a univariate population, but many biological systems involve interaction between populations, necessitating models for two or more populations simultaneously. A lack of efficient methods for evaluating finite-time transition probabilities of bivariate processes, however, has restricted statistical inference in these models. Researchers rely on computationally expensive methods such as matrix exponentiation or Monte Carlo approximation, restricting likelihood-based inference to small systems, or indirect methods such as approximate Bayesian computation...
July 24, 2017: Journal of Mathematical Biology
https://www.readbyqxmd.com/read/28740382/dual-linker-gold-nanoparticles-as-adjuvanting-carriers-for-multivalent-display-of-recombinant-influenza-hemagglutinin-trimers-and-flagellin-improve-the-immunological-responses-in-vivo-and-in-vitro
#9
Chao Wang, Wandi Zhu, Bao-Zhong Wang
Vaccination is the most cost-effective means of infectious disease control. Although current influenza vaccines are effective in battling closely matched strains, such vaccines have major limitations such as the requirement to produce new vaccines every season, an egg-dependent production system, long production periods, uncertainty in matching the vaccine to circulating strains, and the inability to react to new influenza pandemics resulting from genetic drift or shift. To overcome the intrinsic limitations of the conventional influenza vaccine, we have designed dual-linker gold nanoparticles (AuNPs) conjugated with both recombinant trimetric A/Aichi/2/68 (H3N2), hemagglutinin (HA) and TLR5 agonist flagellin (FliC) as a novel vaccine approach...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28738456/-cost-effectiveness-of-community-based-treatment-of-chronic-hepatitis-b-in-china
#10
S X Zhang, P C Yang, Y L Cai, Y Lin, Y H Zou
Objective: Since eliminating hepatitis B in China would need considerable public health resources, the economics problem of the strategy of community-based antiviral treatment for chronic hepatitis B (CHB) has become an important issue. The cost-effectiveness and affordability of the strategy were evaluated in this study. Methods: According to the advocacy on eliminating hepatitis B by WHO and the comprehensive protocol of community based prevention of major infectious diseases and the guideline for CHB prevention and treatment in China, the decision analytic Markov model was constructed with the parameters from national surveys or Meta-analysis...
July 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28738137/public-health-and-economic-consequences-of-vaccine-hesitancy-for-measles-in-the-united-states
#11
Nathan C Lo, Peter J Hotez
Importance: Routine childhood vaccination is declining in some regions of the United States due to vaccine hesitancy, which risks the resurgence of many infectious diseases with public health and economic consequences. There are ongoing policy debates on the state and national level, including legislation around nonmedical (personal-belief) exemptions for childhood vaccination and possibly a special government commission on vaccine safety, which may affect vaccine coverage. Objective: To estimate the number of measles cases in US children and the associated economic costs under scenarios of different levels of vaccine hesitancy, using the case example of measles, mumps, and rubella (MMR) vaccination and measles...
July 24, 2017: JAMA Pediatrics
https://www.readbyqxmd.com/read/28736507/national-mortality-burden-due-to-communicable-non-communicable-and-other-diseases-in-ethiopia-1990-2015-findings-from-the-global-burden-of-disease-study-2015
#12
Awoke Misganaw, Tilahun N Haregu, Kebede Deribe, Gizachew Assefa Tessema, Amare Deribew, Yohannes Adama Melaku, Azmeraw T Amare, Semaw Ferede Abera, Molla Gedefaw, Muluken Dessalegn, Yihunie Lakew, Tolesa Bekele, Mesoud Mohammed, Biruck Desalegn Yirsaw, Solomon Abrha Damtew, Kristopher J Krohn, Tom Achoki, Jed Blore, Yibeltal Assefa, Mohsen Naghavi
BACKGROUND: Ethiopia lacks a complete vital registration system that would assist in measuring disease burden and risk factors. We used the Global Burden of Diseases, Injuries, and Risk Factors Study 2015 (GBD 2015) estimates to describe the mortality burden from communicable, non-communicable, and other diseases in Ethiopia over the last 25 years. METHODS: GBD 2015 mainly used cause of death ensemble modeling to measure causes of death by age, sex, and year for 195 countries...
2017: Population Health Metrics
https://www.readbyqxmd.com/read/28733125/modulation-of-inflammatory-and-immune-responses-by-vitamin-d
#13
REVIEW
Francesco Colotta, Birger Jansson, Fabrizio Bonelli
Vitamin D (VitD) is a prohormone most noted for the regulation of calcium and phosphate levels in circulation, and thus of bone metabolism. Inflammatory and immune cells not only convert inactive VitD metabolites into calcitriol, the active form of VitD, but also express the nuclear receptor of VitD that modulates differentiation, activation and proliferation of these cells. In vitro, calcitriol upregulates different anti-inflammatory pathways and downregulates molecules that activate immune and inflammatory cells...
July 18, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28732536/national-mortality-burden-due-to-communicable-non-communicable-and-other-diseases-in-ethiopia-1990-2015-findings-from-the-global-burden-of-disease-study-2015
#14
Awoke Misganaw, Tilahun N Haregu, Kebede Deribe, Gizachew Assefa Tessema, Amare Deribew, Yohannes Adama Melaku, Azmeraw T Amare, Semaw Ferede Abera, Molla Gedefaw, Muluken Dessalegn, Yihunie Lakew, Tolesa Bekele, Mesoud Mohammed, Biruck Desalegn Yirsaw, Solomon Abrha Damtew, Kristopher J Krohn, Tom Achoki, Jed Blore, Yibeltal Assefa, Mohsen Naghavi
BACKGROUND: Ethiopia lacks a complete vital registration system that would assist in measuring disease burden and risk factors. We used the Global Burden of Diseases, Injuries, and Risk Factors Study 2015 (GBD 2015) estimates to describe the mortality burden from communicable, non-communicable, and other diseases in Ethiopia over the last 25 years. METHODS: GBD 2015 mainly used cause of death ensemble modeling to measure causes of death by age, sex, and year for 195 countries...
July 21, 2017: Population Health Metrics
https://www.readbyqxmd.com/read/28729702/structure-of-general-population-antibody-titer-distributions-to-influenza-a-virus
#15
Nguyen Thi Duy Nhat, Stacy Todd, Erwin de Bruin, Tran Thi Nhu Thao, Nguyen Ha Thao Vy, Tran Minh Quan, Dao Nguyen Vinh, Janko van Beek, Pham Hong Anh, Ha Minh Lam, Nguyen Thanh Hung, Nguyen Thi Le Thanh, Huynh Le Anh Huy, Vo Thi Hong Ha, Stephen Baker, Guy E Thwaites, Nguyen Thi Nam Lien, Tran Thi Kim Hong, Jeremy Farrar, Cameron P Simmons, Nguyen Van Vinh Chau, Marion Koopmans, Maciej F Boni
Seroepidemiological studies aim to understand population-level exposure and immunity to infectious diseases. Their results are normally presented as binary outcomes describing the presence or absence of pathogen-specific antibody, despite the fact that many assays measure continuous quantities. A population's natural distribution of antibody titers to an endemic infectious disease may include information on multiple serological states - naiveté, recent infection, non-recent infection, childhood infection - depending on the disease in question and the acquisition and waning patterns of immunity...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28729558/early-life-disruption-of-amphibian-microbiota-decreases-later-life-resistance-to-parasites
#16
Sarah A Knutie, Christina L Wilkinson, Kevin D Kohl, Jason R Rohr
Changes in the early-life microbiota of hosts might affect infectious disease risk throughout life, if such disruptions during formative times alter immune system development. Here, we test whether an early-life disruption of host-associated microbiota affects later-life resistance to infections by manipulating the microbiota of tadpoles and challenging them with parasitic gut worms as adults. We find that tadpole bacterial diversity is negatively correlated with parasite establishment in adult frogs: adult frogs that had reduced bacterial diversity as tadpoles have three times more worms than adults without their microbiota manipulated as tadpoles...
July 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/28728607/zika-virus-transmission-to-mouse-ear-by-mosquito-bite-a-laboratory-model-that-replicates-the-natural-transmission-process
#17
Nagila Francinete Costa Secundino, Barbara Aparecida Chaves, Alessandra Silva Orfano, Karine Renata Dias Silveira, Nilton Barnabe Rodrigues, Thais Bonifácio Campolina, Rafael Nacif-Pimenta, Luiz Eduardo Martinez Villegas, Breno Melo Silva, Marcus Vinícius Guimarães Lacerda, Douglas Eric Norris, Paulo Filemon Paolucci Pimenta
BACKGROUND: Zika disease has transformed into a serious global health problem due to the rapid spread of the arbovirus and alarming severity including congenital complications, microcephaly and Guillain-Barré syndrome. Zika virus (ZIKV) is primarily transmitted to humans through the bite of an infective mosquito, with Aedes aegypti being the main vector. METHODS: We successfully developed a ZIKV experimental transmission model by single infectious Ae. aegypti bite to a laboratory mouse using circulating Brazilian strains of both arbovirus and vector...
July 20, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28728590/chikungunya-virus-infection-in-cynomolgus-macaques-following-intradermal-and-aerosol-exposure
#18
Chris M Cirimotich, Eric M Vela, Jennifer Garver, Roy E Barnewall, Brian D Miller, Gabriel T Meister, James V Rogers
BACKGROUND: Chikungunya virus (CHIKV) is transmitted via mosquito bite and potentially by aerosol, causing chikungunya fever and arthritic disease in humans. There are currently no licensed vaccines or antiviral therapeutics to protect against CHIKV infection in humans. Animal models recapitulating human disease, especially for transmission by aerosol, are needed for licensure of such medical countermeasures. METHODS: Cynomolgus macaques (CMs) were challenged by intradermal (ID) inoculation or exposure to an aerosol containing CHIKV Ross strain at different target infectious doses (10(3)-10(7) plaque forming units (PFU))...
July 20, 2017: Virology Journal
https://www.readbyqxmd.com/read/28728309/escherichia-coli-outer-membrane-protein-f-ompf-an-immunogenic-protein-induces-cross-reactive-antibodies-against-escherichia-coli-and-shigella
#19
Xiao Wang, Da Teng, Qingfeng Guan, Ruoyu Mao, Ya Hao, Xiumin Wang, Junhu Yao, Jianhua Wang
Diarrhea caused by pathogenic Escherichia coli (E. coli) is one of the most serious infectious diseases in humans and animals. Due to antibiotics resistance and the lack of efficient vaccine, more attention should be paid to find potential versatile vaccine candidates to prevent diseases. In this study, the sequence homology analysis indicated that OmpF from E. coli CVCC 1515 shares a high identity (90-100%) with about half of the E. coli (46.7%) and Shigella (52.8%) strains. Then the recombinant OmpF was supposed to be developed as a versatile vaccine to prevent E...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28727164/the-innate-host-response-in-caries-and-periodontitis
#20
Joerg Meyle, Henrik Dommisch, Sabine Groeger, Rodrigo A Giacaman, Massimo Costalonga, Mark Herzberg
Innate immunity rapidly defends the host against infectious insults. These reactions are of limited specificity and exhaust without providing long-term protection. Functional fluids and effector molecules contribute to the defence against infectious agents, drive the immune response, and direct the cellular players. AIM: To review the literature and present a summary of current knowledge about the function of tissues, cellular players and soluble mediators of innate immunity relevant to caries and periodontitis...
July 20, 2017: Journal of Clinical Periodontology
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