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https://www.readbyqxmd.com/read/28934206/estimating-the-prevalence-and-intensity-of-schistosoma-mansoni-infection-among-rural-communities-in-western-tanzania-the-influence-of-sampling-strategy-and-statistical-approach
#1
Jared S Bakuza, Matthew J Denwood, Gamba Nkwengulila, Barbara K Mable
BACKGROUND: Schistosoma mansoni is a parasite of major public health importance in developing countries, where it causes a neglected tropical disease known as intestinal schistosomiasis. However, the distribution of the parasite within many endemic regions is currently unknown, which hinders effective control. The purpose of this study was to characterize the prevalence and intensity of infection of S. mansoni in a remote area of western Tanzania. METHODOLOGY/PRINCIPAL FINDINGS: Stool samples were collected from 192 children and 147 adults residing in Gombe National Park and four nearby villages...
September 21, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28932250/evidences-of-the-low-implication-of-mosquitoes-in-the-transmission-of-mycobacterium-ulcerans-the-causative-agent-of-buruli-ulcer
#2
REVIEW
Rousseau Djouaka, Francis Zeukeng, Jude Daiga Bigoga, David N'golo Coulibaly, Genevieve Tchigossou, Romaric Akoton, Sylla Aboubacar, Sodjinin Jean-Eudes Tchebe, Clavella Nantcho Nguepdjo, Razack Adeoti, Innocent Djegbe, Manuele Tamo, Wilfred Fon Mbacham, Solange E Kakou-Ngazoa, Anthony Ablordey
BACKGROUND: Buruli ulcer (BU) continues to be a serious public health threat in wet tropical regions and the mode of transmission of its etiological agent, Mycobacterium ulcerans (MU), remains poorly understood. In this study, mosquito species collected in endemic villages in Benin were screened for the presence of MU. In addition, the ability of mosquitoes larvae to pick up MU from their environment and remain colonized through the larval developmental stages to the adult stage was investigated...
2017: Canadian Journal of Infectious Diseases & Medical Microbiology
https://www.readbyqxmd.com/read/28931756/monocyte-dysregulation-and-systemic-inflammation-during-pediatric-falciparum-malaria
#3
Katherine R Dobbs, Paula Embury, John Vulule, Peter S Odada, Bruce A Rosa, Makedonka Mitreva, James W Kazura, Arlene E Dent
BACKGROUND: Inflammation and monocytes are thought to be important to human malaria pathogenesis. However, the relationship of inflammation and various monocyte functions to acute malaria, recovery from acute malaria, and asymptomatic parasitemia in endemic populations is poorly understood. METHODS: We evaluated plasma cytokine levels, monocyte subsets, monocyte functional responses, and monocyte inflammatory transcriptional profiles of 1- to 10-year-old Kenyan children at the time of presentation with acute uncomplicated malaria and at recovery 6 weeks later; these results were compared with analogous data from asymptomatic children and adults in the same community...
September 21, 2017: JCI Insight
https://www.readbyqxmd.com/read/28931128/6-year-review-of-redivi-a-prospective-registry-of-imported-infectious-diseases-in-spain
#4
José A Pérez-Molina, Ana López-Polín, Begoña Treviño, Israel Molina, Josune Goikoetxea, Marta Díaz-Menéndez, Diego Torrús, Eva Calabuig, Agustín Benito, Rogelio López-Vélez
Background: Understanding and detecting imported diseases is a priority in the prevention and management of prevalent and emergent infectious diseases acquired abroad. The +Redivi network measures the burden of imported infections in Spain and is essential for closing the gap in travel medicine. Methods: Demographic characteristics, travel information, syndromes and confirmed travel-related diagnoses were registered in a standardised online database. Results: A total of 10 767 cases of imported infectious diseases were registered between October 2009 and December 2015...
September 1, 2017: Journal of Travel Medicine
https://www.readbyqxmd.com/read/28929534/emerging-arboviruses-in-rio-grande-do-sul-brazil-chikungunya-and-zika-outbreaks-2014-2016
#5
Tatiana Schäffer Gregianini, Tani Ranieri, Cátia Favreto, Zenaida Marion Alves Nunes, Gabriela Luchiari Tumioto Giannini, Nara Druck Sanberg, Marilda Tereza Mar da Rosa, Ana Beatriz Gorini da Veiga
QUESTIONS INVESTIGATED: The recent emergence of arboviruses such as Chikungunya virus (CHIKV) and Zika virus (ZIKV) in Brazil has posed a threat to human health and to the country's economy. Outbreaks occur mainly in tropical areas; however, increasing number of cases have been observed in Rio Grande do Sul (RS), the Southernmost state; therefore, surveillance of these arboviruses is essential for public health measures. DESIGN: In this study, we analyzed 1276 samples from patients with clinically suspected arboviral diseases between 2014 and 2016...
September 20, 2017: Reviews in Medical Virology
https://www.readbyqxmd.com/read/28929415/pediatric-neurocysticercosis
#6
REVIEW
Pratibha Singhi, Arushi Gahlot Saini
Neurocysticercosis is the most common helminth infection of nervous system in humans caused by the encysted larvae of Taenia solium. It is a major cause of epilepsy in tropical areas and the most common cause of focal-onset seizures in North Indian children. Children with neurocysticercosis have pleomorphic manifestations depending on the location, number and viability of the cysts and host response. In endemic areas, neurocysticercosis should be clinically suspected in any child with recent-onset seizures, headache or focal motor deficits where there is no other suggestion of an underlying neurological disorder...
September 20, 2017: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/28927770/-pyomyositis-in-children-two-cases-of-staphylococcus-aureus-infection
#7
F Gravot, J Hébert, A Robert-Dehault, R Bouttier, F Le Gall, G Blondin, P Vic
Pyomyositis is a term used to denote primary pyogenic infection of a skeletal muscle. It is a rare disease that was first described in immunodeficient patients living in tropical climates. Lately, however, cases involving healthy children have been described in temperate climates. The origin of primary pyomyositis remains unclear, although it is thought to be caused by seeding from transient bacteremia. Onset of disease is insidious, therefore necessitating rapid diagnosis to successfully select appropriate antibiotic therapy and avoid complications...
September 15, 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/28927458/sybr-green-based-one-step-quantitative-real-time-polymerase-chain-reaction-assay-for-the-detection-of-zika-virus-in-field-caught-mosquitoes
#8
Wei-Ping Tien, Gareth Lim, Gladys Yeo, Suzanna Nicole Chiang, Chee-Seng Chong, Lee-Ching Ng, Hapuarachchige Chanditha Hapuarachchi
BACKGROUND: The monitoring of vectors is one of the key surveillance measures to assess the risk of arbovirus transmission and the success of control strategies in endemic regions. The recent re-emergence of Zika virus (ZIKV) in the tropics, including Singapore, emphasizes the need to develop cost-effective, rapid and accurate assays to monitor the virus spread by mosquitoes. As ZIKV infections largely remain asymptomatic, early detection of ZIKV in the field-caught mosquitoes enables timely implementation of appropriate mosquito control measures...
September 19, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28923009/apophysomyces-variabilis-draft-genome-sequence-and-comparison-of-predictive-virulence-determinants-with-other-medically-important-mucorales
#9
Hariprasath Prakash, Shivaprakash Mandya Rudramurthy, Prasad S Gandham, Anup Kumar Ghosh, Milner M Kumar, Chandan Badapanda, Arunaloke Chakrabarti
BACKGROUND: Apophysomyces species are prevalent in tropical countries and A. variabilis is the second most frequent agent causing mucormycosis in India. Among Apophysomyces species, A. elegans, A. trapeziformis and A. variabilis are commonly incriminated in human infections. The genome sequences of A. elegans and A. trapeziformis are available in public database, but not A. variabilis. We, therefore, performed the whole genome sequence of A. variabilis to explore its genomic structure and possible genes determining the virulence of the organism...
September 18, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28922459/therapeutic-plasma-exchange-in-the-treatment-of-complicated-plasmodium-falciparum-malaria-a-case-report
#10
Tsong-Yih Ou, Cheng-Yen Chuang, Chun-Da Chen, Chung-Yi Cheng
Severe falciparum malaria is associated with multiple organ dysfunction and a high rate of fatal outcome. Malaria is a world-wide disease in tropical areas through the bites of vector mosquitoes. Parasitic protozoans introduced by the mosquito's saliva to the blood travel to the liver then mature and reproduce. In humans, malaria is caused by Plasmodium falciparum, P. malariae, P. ovale, P. vivax, and P. knowlesi, and P. falciparum causes most deaths. Typical malaria symptoms include fever, chills, fatigue, headache, nausea, and vomiting...
September 18, 2017: Journal of Clinical Apheresis
https://www.readbyqxmd.com/read/28919885/trypanosoma-cruzi-evades-the-complement-system-as-an-efficient-strategy-to-survive-in-the-mammalian-host-the-specific-roles-of-host-parasite-molecules-and-trypanosoma-cruzi-calreticulin
#11
REVIEW
Galia Ramírez-Toloza, Arturo Ferreira
American Trypanosomiasis is an important neglected reemerging tropical parasitism, infecting about 8 million people worldwide. Its agent, Trypanosoma cruzi, exhibits multiple mechanisms to evade the host immune response and infect host cells. An important immune evasion strategy of T. cruzi infective stages is its capacity to inhibit the complement system activation on the parasite surface, avoiding opsonizing, immune stimulating and lytic effects. Epimastigotes, the non-infective form of the parasite, present in triatomine arthropod vectors, are highly susceptible to complement-mediated lysis while trypomastigotes, the infective form, present in host bloodstream, are resistant...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28911127/nutritional-status-of-children-from-low-income-countries-arriving-in-spain
#12
Moncef Belhassen-García, Virginia Velasco-Tirado, Amparo Lopez-Bernus, Juan Luis Muñoz Bellido, Antonio Muro, Miguel Cordero, Javier Pardo-Lledias
Background: Nutritional problems, anaemia and infectious diseases are the main causes of morbidity and mortality in children and adolescents in tropical and subtropical areas. The main objective of this study was to determine the nutritional status in children from low-income countries who migrated to Spain and the value of the usual biochemistry markers of nutrition in these children, as well as to evaluate the nutritional status associated with imported infectious diseases. Moreover, we evaluated the association between anaemia and nutrition problems...
September 1, 2017: International Health
https://www.readbyqxmd.com/read/28910476/no-ordinary-sleeper-cell-managing-the-varied-problems-of-plasmodium-vivax-malaria
#13
Jason Jarvis
Plasmodium vivax malaria is an essential yet elusive target of tropical disease eradication efforts, and is the focus of this literature review. This review will reacquaint Special Operations Forces (SOF) Medics with the basic principles of malaria as context for understanding the several confounding issues particular to P. vivax infections. The review concludes with current malaria guidelines and malaria mitigation strategies.
2017: Journal of Special Operations Medicine: a Peer Reviewed Journal for SOF Medical Professionals
https://www.readbyqxmd.com/read/28910419/il-10-mediated-signals-act-as-a-switch-for-lymphoproliferation-in-human-t-cell-leukemia-virus-type-1-infection-by-activating-the-stat3-and-irf4-pathways
#14
Leila Sawada, Yoshiko Nagano, Atsuhiko Hasegawa, Hikari Kanai, Kai Nogami, Sayaka Ito, Tomoo Sato, Yoshihisa Yamano, Yuetsu Tanaka, Takao Masuda, Mari Kannagi
Human T-cell leukemia virus type-1 (HTLV-1) causes two distinct diseases, adult T-cell leukemia/lymphoma (ATL) and HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP). Since there are no disease-specific differences among HTLV-1 strains, the etiological mechanisms separating these respective lymphoproliferative and inflammatory diseases are not well understood. In this study, by using IL-2-dependent HTLV-1-infected T-cell lines (ILTs) established from patients with ATL and HAM/TSP, we demonstrate that the anti-inflammatory cytokine IL-10 and its downstream signals potentially act as a switch for proliferation in HTLV-1-infected cells...
September 14, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28910379/a-one-year-prospective-study-of-colonization-with-antimicrobial-resistant-organisms-on-admission-to-a-vietnamese-intensive-care-unit
#15
Duong Bich Thuy, James Campbell, Nguyen Van Minh Hoang, Truong Thi Thuy Trinh, Ha Thi Hai Duong, Nguyen Chi Hieu, Nguyen Hoang Anh Duy, Nguyen Van Hao, Stephen Baker, Guy E Thwaites, Nguyen Van Vinh Chau, C Louise Thwaites
There is a paucity of data regarding initial bacterial colonization on admission to Intensive Care Units (ICUs) in low and middle-income countries (LMICs). Patients admitted to ICUs in LMICs are at high-risk of subsequent infection with antimicrobial-resistant organisms (AROs). We conducted a prospective, observational study at the Hospital for Tropical Diseases in Ho Chi Minh City, Vietnam from November 2014 to January 2016 to assess the colonization and antimicrobial susceptibility of Staphylococcus aureus, Escherichia coli, Klebsiella spp...
2017: PloS One
https://www.readbyqxmd.com/read/28910299/access-to-benznidazole-for-chagas-disease-in-the-united-states-cautious-optimism
#16
Jonathan D Alpern, Rogelio Lopez-Velez, William M Stauffer
Drugs for neglected tropical diseases (NTD) are being excessively priced in the United States. Benznidazole, the first-line drug for Chagas disease, may become approved by the Food and Drug Administration (FDA) and manufactured by a private company in the US, thus placing it at risk of similar pricing. Chagas disease is an NTD caused by Trypanosoma cruzi; it is endemic to Latin America, infecting 8 million individuals. Human migration has changed the epidemiology causing nonendemic countries to face increased challenges in diagnosing and managing patients with Chagas disease...
September 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28906580/comparison-of-one-commercial-and-two-in-house-taqman-multiplex-real-time-pcr-assays-for-detection-of-enteropathogenic-enterotoxigenic-and-enteroaggregative-escherichia-coli
#17
Andreas Hahn, Marc Luetgehetmann, Olfert Landt, Norbert Georg Schwarz, Hagen Frickmann
OBJECTIVE: Enteropathogenic, enterotoxigenic, and enteroaggregative Escherichia coli (EPEC, ETEC, EAEC) are among the most frequent causes of diarrhea during travel or on military deployments. Cost efficient and reliable real-time multiplex PCR (mPCR) assays are desirable for surveillance or point prevalence studies in remote and resource-limited tropical settings. We compared one commercial PCR kit and two in-house assays without using a gold standard to estimate sensitivity and specificity of each assay...
September 14, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28906183/odontomas-in-two-long-finned-ocellaris-clownfish-amphiprion-ocellaris
#18
Bryan S Vorbach, Jeffrey C Wolf, Roy P Yanong
Two adult long-finned ocellaris clownfish ( Amphiprion ocellaris) from 2 different aquaculture facilities were examined at the University of Florida, Tropical Aquaculture Laboratory for oral masses. Incisional biopsies were obtained from the masses under anesthesia, and histologic examination revealed both to be odontomas. Most benign odontomas are classified as hamartomas (disorganized proliferations of tissues found normally at the site of origin). Odontomas have previously been reported in wild teleost fish in association with viral infections and pollution...
September 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28904745/genome-editing-of-the-hiv-co-receptors-ccr5-and-cxcr4-by-crispr-cas9-protects-cd4-t-cells-from-hiv-1-infection
#19
Zhepeng Liu, Shuliang Chen, Xu Jin, Qiankun Wang, Kongxiang Yang, Chenlin Li, Qiaoqiao Xiao, Panpan Hou, Shuai Liu, Shaoshuai Wu, Wei Hou, Yong Xiong, Chunyan Kong, Xixian Zhao, Li Wu, Chunmei Li, Guihong Sun, Deyin Guo
BACKGROUND: The main approach to treat HIV-1 infection is combination antiretroviral therapy (cART). Although cART is effective in reducing HIV-1 viral load and controlling disease progression, it has many side effects, and is expensive for HIV-1 infected patients who must remain on lifetime treatment. HIV-1 gene therapy has drawn much attention as studies of genome editing tools have progressed. For example, zinc finger nucleases (ZFN), transcription activator like effector nucleases (TALEN) and clustered regularly interspaced short palindromic repeats (CRISPR)-Cas9 have been utilized to successfully disrupt the HIV-1 co-receptors CCR5 or CXCR4, thereby restricting HIV-1 infection...
2017: Cell & Bioscience
https://www.readbyqxmd.com/read/28904198/type-1-interferon-signalling-to-dendritic-cells-limits-murid-herpesvirus-4-spread-from-the-olfactory-epithelium
#20
Clara Lawler, Philip G Stevenson
Murid Herpesvirus-4 (MuHV-4) is a B cell-tropic gamma-herpesvirus that can be studied in vivo Despite viral evasion, type 1 interferons (IFN-I) limit its spread. After MuHV-4 inoculation into footpads, IFN-I protect lymph node subcapsular sinus macrophages (SSM) against productive infection; after peritoneal inoculation, they protect splenic marginal zone macrophages; and they limit MuHV-4 replication in the lungs. While invasive infections can test specific aspects of host colonization, it is important also to understand natural infection...
September 13, 2017: Journal of Virology
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