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https://www.readbyqxmd.com/read/29775680/assessing-the-effects-of-daily-commuting-in-two-patch-dengue-dynamics-a-case-study-of-cali-colombia
#1
Edwin Barrios, Sunmi Lee, Olga Vasilieva
There are many infectious diseases that can be spread by daily commuting of people and dengue fever is one of them. The absence of vaccine and irregularities in ongoing vector control programs make this disease the most frequent and persistent in many tropical and subtropical regions of the world. This paper targets to access the effects of daily commuting on dengue transmission dynamics by using a deterministic two-patch model fitted to observed data gathered in Cali, Colombia where dengue fever is highly persistent and exhibits endemo-epidemic patterns...
May 15, 2018: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/29774856/hepatitis-e-in-long-term-travelers-from-the-netherlands-to-subtropical-and-tropical-countries-2008-2011
#2
Floortje Elfrink, Femke W Overbosch, Janke Schinkel, Gerrit Koen, Gerard J B Sonder
Hepatitis E virus (HEV) is a common cause of acute viral hepatitis. Virus genotypes 1 and 2 infect humans in developing countries by the fecal-oral route. To assess attack rates and disease incidence for travelers, we prospectively studied 604 long-term travelers to subtropical and tropical countries. Participants donated blood samples pretravel and posttravel and kept a diary. A total of 89/604 (15%) pretravel samples were positive for HEV IgG by ELISA, suggesting previous HEV infection. Seroconversion for HEV was found for 19/515 travelers (attack rate 3...
June 2018: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29774301/-mansonella-perstans-onchocerca-volvulus-and-strongyloides-stercoralis-infections-in-rural-populations-in-central-and-southern-togo
#3
Francois Korbmacher, Kossi Komlan, Richard G Gantin, Wiyao P Poutouli, Koffi Padjoudoum, Potchoziou Karabou, Peter T Soboslay, Carsten Köhler
Background: Mansonella perstans , Onchocerca volvulus and Strongyloides stercoralis are widespread helminth parasites in the tropics. Their distribution remains difficult to determine as it may change during national disease control programs and with regional mass drug administration (MDA). Epidemiological surveys are of importance to evaluate the geographical distribution of these helminth parasites and the diseases they may cause, however, up to date epidemiological evaluations on M...
May 2018: Parasite Epidemiology and Control
https://www.readbyqxmd.com/read/29774299/spatial-distribution-and-cluster-analysis-of-dengue-using-self-organizing-maps-in-andhra-pradesh-india-2011-2013
#4
Srinivasa Rao Mutheneni, Rajasekhar Mopuri, Suchithra Naish, Deepak Gunti, Suryanarayana Murty Upadhyayula
Background and objectives: Dengue is an emerging and re-emerging infectious disease, transmitted by mosquitoes. It is mostly prevalent in tropical and sub-tropical regions of the world, particularly, in Asia-Pacific region. To understand the epidemiology and spatial distribution of dengue, a retrospective surveillance study was conducted in the state of Andhra Pradesh, India during 2011-2013. Material and methods: District-wise disease endemicity levels were mapped through geographical information system (GIS) tools...
February 2018: Parasite Epidemiology and Control
https://www.readbyqxmd.com/read/29774290/urbanization-of-human-visceral-leishmaniasis-in-morocco
#5
Kholoud Kahime, Samia Boussaa, Haddou Nhammi, Ali Boumezzough
Human visceral leishmaniasis one of the seven most neglected tropical diseases in the world. In Morocco, HVL is widespread in all regions; but it is more common in the northern part with sporadic cases observed in the South. During the period between 2004 and 2013, the most affected Moroccan provinces were Taounate province, with 220 cases (16.09% of all cases), followed by Chefchaouen with 13.17% and Taza with 10.46% of the total cases. Children < 5 years old are the most affected age group, most cases registered were male...
November 2017: Parasite Epidemiology and Control
https://www.readbyqxmd.com/read/29774285/molecular-prevalence-of-babesia-bigemina-in-rhipicephalus-microplus-ticks-infesting-cross-bred-cattle-of-punjab-india
#6
S A Bhat, N K Singh, H Singh, S S Rath
Babesiosis is an economically important tick-borne apicomplexan protozoan disease of cattle in tropical and subtropical regions. In the present study, Rhipicephalus microplus engorged female ticks were collected from 135 apparently healthy cattle from different agro-climatic zones of Punjab, India, to investigate the carrier status of Babesia bigemina infection in vector tick by using microscopy and PCR based assays. PCR when applied on DNA extracted from the egg masses harvested from ticks showed 1.48% (2/135) samples as positive, whereas 4...
August 2017: Parasite Epidemiology and Control
https://www.readbyqxmd.com/read/29774047/genome-sequencing-and-analysis-of-the-peanut-b-genome-progenitor-arachis-ipaensis
#7
Qing Lu, Haifen Li, Yanbin Hong, Guoqiang Zhang, Shijie Wen, Xingyu Li, Guiyuan Zhou, Shaoxiong Li, Hao Liu, Haiyan Liu, Zhongjian Liu, Rajeev K Varshney, Xiaoping Chen, Xuanqiang Liang
Peanut ( Arachis hypogaea L.), an important leguminous crop, is widely cultivated in tropical and subtropical regions. Peanut is an allotetraploid, having A and B subgenomes that maybe have originated in its diploid progenitors Arachis duranensis (A-genome) and Arachis ipaensis (B-genome), respectively. We previously sequenced the former and here present the draft genome of the latter, expanding our knowledge of the unique biology of Arachis . The assembled genome of A. ipaensis is ~1.39 Gb with 39,704 predicted protein-encoding genes...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29773776/cuba-s-scientific-contributions-to-global-polio-eradication
#8
Sonia Resik, Ondrej Mach, Alina Tejeda, Miguel A Galindo, Roland W Sutter
Cuba eliminated polio in 1962 and was among the first countries to do so. Since then, only 20 cases of vaccine-derived paralytic poliomyelitis have been reported. Because Cuba used oral poliovirus vaccine exclusively in two mass campaigns usually in February and April each year, Sabin viruses were detected only within approximately 6-8 weeks after each annual campaign. This made Cuba a very attractive site to study the epidemiology of poliomyelitis in a tropical country without risk of secondary transmission of Sabin viruses for a large part of each year, an advantage over countries that used oral poliovirus vaccine continuously throughout the year in routine immunization programs...
April 2018: MEDICC Review
https://www.readbyqxmd.com/read/29773774/us-and-cuban-scientists-forge-collaboration-on-arbovirus-research
#9
Jorge Pérez-Ávila, Maria G Guzmán-Tirado, Jorge Fraga-Nodarse, Gray Handley, James Meegan, Jose L Pelegrino-Martínez de la Cotera, Anthony S Fauci
After December 17, 2014, when the US and Cuban governments announced their intent to restore relations, the two countries participated in various exchange activities in an effort to encourage cooperation in public health, health research and biomedical sciences. The conference entitled Exploring Opportunities for Arbovirus Research Collaboration, hosted at Havana's Hotel Nacional, was part of these efforts and was the first major US-Cuban scientific conference in over 50 years. Its purpose was to share information about current arbovirus research and recent findings, and to explore opportunities for future joint research...
April 2018: MEDICC Review
https://www.readbyqxmd.com/read/29773773/cuban-epidemic-neuropathy-insights-into-the-toxic-nutritional-hypothesis-through-international-collaboration
#10
Alina González-Quevedo, Rosaralis Santiesteban-Freixas, Janis T Eells, Lucimey Lima, Alfredo A Sadun
From 1991 to 1993, an epidemic of optic and peripheral neuropathy-the largest of the century-broke out in Cuba, affecting more than 50,000 people. Initially the main clinical features were decreased visual acuity, central and cecocentral scotomas, impaired color vision and absence of the papillomacular bundle. Later, peripheral and mixed optic-peripheral forms began to appear. Due to the magnitude of the epidemic, the Cuban government requested help from the international community at the 46th World Health Assembly in 1993...
April 2018: MEDICC Review
https://www.readbyqxmd.com/read/29772890/application-of-decision-tree-for-prediction-of-cutaneous-leishmaniasis-incidence-based-on-environmental-and-topographic-factors-in-isfahan-province-iran
#11
Roghieh Ramezankhani, Nooshin Sajjadi, Roya Nezakati Esmaeilzadeh, Seyed Ali Jozi, Mohammad Reza Shirzadi
Cutaneous Leishmaniasis (CL) is a neglected tropical disease that continues to be a health problem in Iran. Nearly 350 million people are thought to be at risk. We investigated the impact of the environmental factors on CL incidence during the period 2007- 2015 in a known endemic area for this disease in Isfahan Province, Iran. After collecting data with regard to the climatic, topographic, vegetation coverage and CL cases in the study area, a decision tree model was built using the classification and regression tree algorithm...
May 8, 2018: Geospatial Health
https://www.readbyqxmd.com/read/29772762/paradoxical-effect-of-chloroquine-treatment-in-enhancing-chikungunya-virus-infection
#12
Pierre Roques, Simon-Djamel Thiberville, Laurence Dupuis-Maguiraga, Fok-Moon Lum, Karine Labadie, Frédéric Martinon, Gabriel Gras, Pierre Lebon, Lisa F P Ng, Xavier de Lamballerie, Roger Le Grand
Since 2005, Chikungunya virus (CHIKV) re-emerged and caused numerous outbreaks in the world, and finally, was introduced into the Americas in 2013. The lack of CHIKV-specific therapies has led to the use of non-specific drugs. Chloroquine, which is commonly used to treat febrile illnesses in the tropics, has been shown to inhibit CHIKV replication in vitro. To assess the in vivo effect of chloroquine, two complementary studies were performed: (i) a prophylactic study in a non-human primate model (NHP); and (ii) a curative study "CuraChik", which was performed during the Reunion Island outbreak in 2006 in a human cohort...
May 17, 2018: Viruses
https://www.readbyqxmd.com/read/29771976/skin-disease-prevalence-study-in-schoolchildren-in-rural-c%C3%A3-te-d-ivoire-implications-for-integration-of-neglected-skin-diseases-skin-ntds
#13
Rie Roselyne Yotsu, Kouamé Kouadio, Bamba Vagamon, Konan N'guessan, Amari Jules Akpa, Aubin Yao, Julien Aké, Rigobert Abbet Abbet, Barbine Tchamba Agbor Agbor, Roger Bedimo, Norihisa Ishii, L Claire Fuller, Roderick Hay, Oriol Mitjà, Henning Drechsler, Kingsley Asiedu
BACKGROUND: Early detection of several skin-related neglected tropical diseases (skin NTDs)-including leprosy, Buruli ulcer, yaws, and scabies- may be achieved through school surveys, but such an approach has seldom been tested systematically on a large scale in endemic countries. Additionally, a better understanding of the spectrum of skin diseases and the at-risk populations to be encountered during such surveys is necessary to facilitate the process. METHODS: We performed a school skin survey for selected NTDs and the spectrum of skin diseases, among primary schoolchildren aged 5 to 15 in Côte d'Ivoire, West Africa...
May 17, 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29771921/mosquito-saliva-alone-has-profound-effects-on-the-human-immune-system
#14
Megan B Vogt, Anismrita Lahon, Ravi P Arya, Alexander R Kneubehl, Jennifer L Spencer Clinton, Silke Paust, Rebecca Rico-Hesse
Mosquito saliva is a very complex concoction of >100 proteins, many of which have unknown functions. The effects of mosquito saliva proteins injected into our skin during blood feeding have been studied mainly in mouse models of injection or biting, with many of these systems producing results that may not be relevant to human disease. Here, we describe the numerous effects that mosquito bites have on human immune cells in mice engrafted with human hematopoietic stem cells. We used flow cytometry and multiplex cytokine bead array assays, with detailed statistical analyses, to detect small but significant variations in immune cell functions after 4 mosquitoes fed on humanized mice footpads...
May 2018: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29771915/inactivation-of-bpsl1039-1040-atp-binding-cassette-transporter-reduces-intracellular-survival-in-macrophages-biofilm-formation-and-virulence-in-the-murine-model-of-burkholderia-pseudomallei-infection
#15
Peechanika Pinweha, Pornpan Pumirat, Jon Cuccui, Niramol Jitprasutwit, Veerachat Muangsombut, Varintip Srinon, Usa Boonyuen, Parameth Thiennimitr, Paiboon Vattanaviboon, Felipe Cia, Sam Willcocks, Gregory J Bancroft, Brendan W Wren, Sunee Korbsrisate
Burkholderia pseudomallei, a gram-negative intracellular bacillus, is the causative agent of a tropical infectious disease called melioidosis. Bacterial ATP-binding cassette (ABC) transporters import and export a variety of molecules across bacterial cell membranes. At present, their significance in B. pseudomallei pathogenesis is poorly understood. We report here characterization of the BPSL1039-1040 ABC transporter. B. pseudomallei cultured in M9 medium supplemented with nitrate, demonstrated that BPSL1039-1040 is involved in nitrate transport for B...
2018: PloS One
https://www.readbyqxmd.com/read/29770673/-global-burden-and-challenges-of-parasitic-diseases-in-africa
#16
Li Yi-Ting, Ren Guang-Hui, Liang You-Sheng, Yang Kun, Sun Le-Ping, Li Shi-Zhu, Lü Shan, Jia Tie-Wu
Parasitic diseases are common infectious diseases closely related to poverty, which are mainly endemic in the tropical and subtropical regions. Africa is the major epidemic area of parasitic diseases, and the global burden of malaria and schistosomiasis is over 85% in Africa. This paper reviews the disease burden, regional distribution and control strategies of the main parasitic diseases in Africa, in order to promote the prevention and control of parasitic diseases in this area.
April 17, 2018: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
https://www.readbyqxmd.com/read/29766661/structure-based-design-of-a-eukaryote-selective-antiprotozoal-fluorinated-aminoglycoside
#17
Hiroki Kanazawa, Oscar M Saavedra, Juan Pablo Maianti, Simon A Young, Luis Izquierdo, Terry K Smith, Stephen Hanessian, Jiro Kondo
Aminoglycosides (AG) are antibiotics that lower the accuracy of protein synthesis by targeting a highly-conserved RNA helix of the ribosomal A-site. The discovery of AGs that selectively target the eukaryotic ribosome, but lack activity in prokaryotes, are promising as antiprotozoals for the treatment of neglected tropical diseases, and as therapies to read-through point-mutation genetic diseases. However, a single nucleobase change A1408G in the eukaryotic A-site leads to negligible affinity for most AGs. Herein we report the synthesis of 6'-fluoro sisomicin, the first 6'-fluorinated aminoglycoside, which specifically interacts with the protozoal cytoplasmic rRNA A-site, but not the bacterial A-site, as evidenced by X-ray co-crystal structures...
May 15, 2018: ChemMedChem
https://www.readbyqxmd.com/read/29766270/parasitological-and-molecular-diagnostic-of-a-clinical-babesia-caballi-outbreak-in-southern-romania
#18
Mariana Ionita, Isabela Madalina Nicorescu, Kurt Pfister, Ioan Liviu Mitrea
Equine piroplasmosis (EP) is a tick-borne disease of equids caused by Babesia caballi and/or Theileria equi, which is endemic in many tropical and temperate areas of the world. However, clinical outbreaks of EP in Romania during the last decades have not been reported Therefore, the aim of this paper is (i) to describe a clinical B. caballi outbreak in horses on several farms in Southern Romania using a diagnostic and therapeutic approach and (ii) the molecular diagnostic of EP in an endemic area of Romania...
May 15, 2018: Parasitology Research
https://www.readbyqxmd.com/read/29765675/-leishmania-naiffi-and-leishmania-guyanensis-reference-genomes-highlight-genome-structure-and-gene-evolution-in-the-viannia-subgenus
#19
Simone Coughlan, Ali Shirley Taylor, Eoghan Feane, Mandy Sanders, Gabriele Schonian, James A Cotton, Tim Downing
The unicellular protozoan parasite Leishmania causes the neglected tropical disease leishmaniasis, affecting 12 million people in 98 countries. In South America, where the Viannia subgenus predominates, so far only L. ( Viannia ) braziliensis and L. ( V. ) panamensis have been sequenced, assembled and annotated as reference genomes. Addressing this deficit in molecular information can inform species typing, epidemiological monitoring and clinical treatment. Here, L. ( V. ) naiffi and L. ( V. ) guyanensis genomic DNA was sequenced to assemble these two genomes as draft references from short sequence reads...
April 2018: Royal Society Open Science
https://www.readbyqxmd.com/read/29764474/acute-blindness-as-a-presenting-sign-of-childhood-endemic-burkitt-s-lymphoma-in-cameroon-a-case-report
#20
Brice N Vofo, Gaelle V F Ngankam, Calypse A Ngwasiri, Jeannine A Atem, Leopold N Aminde
BACKGROUND: Endemic Burkitt's lymphoma is found predominantly in malaria holoendemic zones, typically in the tropical rain forest of Africa. It usually presents as an extra-nodal tumour in children and young adults with predilection for jaws and soft tissues of the abdomen. Clinical features depend on the primary tumour site, extent of the disease and histologic subtype. Acute blindness as a presentation sign is rare. CASE PRESENTATION: A 13 year old African female presented to our facility with a 3 week history of painful abdominal distention, and loss of vision of the left eye...
May 16, 2018: Journal of Medical Case Reports
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