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https://www.readbyqxmd.com/read/27907248/mycobacterium-ulcerans-toxin-mycolactone-may-enhance-host-seeking-and-oviposition-behavior-by-aedes-aegypti-l-diptera-culicidae
#1
M L Sanders, H R Jordan, C Serewis-Pond, L Zheng, M E Benbow, P L Small, J K Tomberlin
The ecological functions of many toxins continue to remain unknown for those produced by environmental pathogens. Mycobacterium ulcerans, the causative agent of the neglected tropical disease, Buruli ulcer, produces a cytotoxic macrolide, mycolactone, whose function(s) in the environment remains elusive. Through a series of dual-choice behavior assays, we show that mycolactone may be an interkingdom cue for the yellow fever mosquito, Aedes aegypti, seeking blood-meals as well as oviposition sites. Results provide novel insight into the evolution between bacteria and potential vectors...
December 1, 2016: Environmental Microbiology
https://www.readbyqxmd.com/read/27906074/size-sounds-and-sex-interactions-between-body-size-and-harmonic-convergence-signals-determine-mating-success-in-aedes-aegypti
#2
Lauren J Cator, Zacharo Zanti
BACKGROUND: Several new mosquito control strategies will involve the release of laboratory reared males which will be required to compete with wild males for mates. Currently, the determinants of male mating success remain unclear. The presence of convergence between male and female harmonic flight tone frequencies during a mating attempt have been found to increase male mating success in the yellow fever mosquito, Aedes aegypti. Size has also been implicated as a factor in male mating success...
December 1, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27880744/notice-to-readers-final-2015-reports-of-nationally-notifiable-infectious-diseases-and-conditions
#3
(no author information available yet)
The table listed in this report on pages 1307-1321 presents finalized data, as of June 30, 2016, from the National Notifiable Diseases Surveillance System (NNDSS) for 2015. These data will be published in more detail in the Summary of Notifiable Infectious Diseases and Conditions - United States, 2015 (1). Because no cases were reported in the United States during 2015, the following diseases do not appear in this early release table: anthrax; dengue hemorrhagic fever; diphtheria; eastern equine encephalitis virus disease, nonneuroinvasive; poliomyelitis, paralytic; poliovirus infection, nonparalytic; severe acute respiratory syndrome-associated coronavirus disease (SARS-CoV); smallpox; western equine encephalitis virus disease, neuroinvasive and nonneuroinvasive; yellow fever; and viral hemorrhagic fevers...
November 25, 2016: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/27876974/mosquito-larvicidal-activity-of-cadmium-nanoparticles-synthesized-from-petal-extracts-of-marigold-tagetes-sp-and-rose-rosa-sp-flower
#4
Amita Hajra, Snehali Dutta, Naba Kumar Mondal
Mosquitoes are blood-thirsty insects and serve as the most important vectors for spreading most notorious diseases such as malaria, yellow fever, dengue fever, and filariasis. The extensive use of synthetic mosquito repellent has resulted in resistance in mosquitoes. Therefore, the development of a reliable, eco-friendly processes for the synthesis of nano dimensional materials is an utmost important aspect of nanotechnology. In the present study, authors report absolute green synthesis of cadmium nanoparticles using marigold and rose flower petal extract...
December 2016: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/27870643/yellow-fever-vaccine-17d-administered-to-healthy-women-aged-between-40-and-54-years-halves-breast-cancer-risk-an-observational-study
#5
Giuseppe Mastrangelo, Sofia Pavanello, Emanuela Fadda, Alessandra Buja, Ugo Fedeli
Transcripts of human endogenous retrovirus K are expressed in most breast cancers (BCs). Yellow fever vaccine 17D (YFV) expresses a protein with a closely homologous epitope. Cross-reactive immunity could hypothetically inhibit BC growth at least in women aged around 50 years at diagnosis, in whom the prognosis of BC was found to be better than that in women younger or older. A cohort of 12 804 women who received YFV in the Veneto Region, Italy, was divided into two subcohorts according to age at vaccination and followed up through the Veneto Tumor Registry...
November 18, 2016: European Journal of Cancer Prevention
https://www.readbyqxmd.com/read/27869977/methods-and-procedures-used-in-aedes-aegypti-control-in-the-successful-campaign-for-yellow-fever-prophylaxis-in-rio-de-janeiro-brazil-in-1928-and-1929
#6
Eduardo Dias Wermelinger, Raimundo Wilson de Carvalho
OBJECTIVE: to review the challenges and procedures used in Aedes aegypti control and the characteristics of the epidemics in the successful campaign, led by Clementino Fraga, for yellow fever control in Rio de Janeiro, Brazil, in 1928 and 1929, before the vaccine (1937) and DDT (1947). METHODS: a literature review was conducted by searching official reports, scientific journals and historic textbooks on this subject. RESULTS: the A. aegypti control was achieved through the hard and organized work of breeding site police teams, priority in eliminating breeding sites through environmental management measures and a qualified training program for the teams...
October 2016: Epidemiologia e Servicos de Saude: Revista do Sistema Unico de Saude do Brasil
https://www.readbyqxmd.com/read/27869924/yellow-fever-outbreaks-in-s%C3%A3-o-paulo-state-brazil-2000-2010
#7
Leila Del Castillo Saad, Rita Barradas Barata
OBJECTIVE: to describe yellow fever occurrence in the state of São Paulo, Brazil, in the period 2000-2010. METHODS: this was a descriptive study using data regarding human cases, epizootics in non-human primates and virus vector isolation in São Paulo State, between 2000 and 2010. RESULTS: three sylvatic yellow fever outbreaks were registered in the state with 32 human cases and 15 deaths; the cases occurred in unvaccinated individuals exposed to the sylvatic form of transmission; epizootics was confirmed before the virus began circulating in humans in the region of São José do Rio Preto and the virus was isolated twice in vectors...
July 2016: Epidemiologia e Servicos de Saude: Revista do Sistema Unico de Saude do Brasil
https://www.readbyqxmd.com/read/27869724/mosquito-oviposition-behavior-and-vector-control
#8
REVIEW
Jonathan F Day
The burden of gene transfer from one mosquito generation to the next falls on the female and her eggs. The selection of an oviposition site that guarantees egg and larval survival is a critical step in the reproductive process. The dangers associated with ephemeral aquatic habitats, lengthy droughts, freezing winters, and the absence of larval nutrition makes careful oviposition site selection by a female mosquito extremely important. Mosquito species exhibit a remarkable diversity of oviposition behaviors that ensure eggs are deposited into microenvironments conducive for successful larval development and the emergence of the next mosquito generation...
November 18, 2016: Insects
https://www.readbyqxmd.com/read/27864138/sarniensine-a-mesembrine-type-alkaloid-isolated-from-nerine-sarniensis-an-indigenous-south-african-amaryllidaceae-with-larvicidal-and-adulticidal-activities-against-aedes-aegypti
#9
Marco Masi, Alet E van der Westhuyzen, Nurhayat Tabanca, Marco Evidente, Alessio Cimmino, Ivan R Green, Ulrich R Bernier, James J Becnel, Jeffrey R Bloomquist, Willem A L van Otterlo, Antonio Evidente
A new mesembrine-type alkaloid, named sarniensine, was isolated together with tazettine, lycorine, the main alkaloid, and 3-epimacronine from Nerine sarniensis, with the last two produced for the first time by this plant. This Amaryllidaceae, which is indigenous of South Africa, was investigated for its alkaloid content, because the organic extract of its bulbs showed strong larvicidal activity with an LC50 value of 0.008μgμL(-1) against first instar Aedes aegypti larvae and with an LD50 value 4.6μg/mosquito against adult female Ae...
November 15, 2016: Fitoterapia
https://www.readbyqxmd.com/read/27861674/epidemiological-characteristics-of-yellow-fever-in-brazil-2000-2012
#10
Karina Ribeiro Leite Jardim Cavalcante, Pedro Luiz Tauil
OBJECTIVE: this study aims to describe the epidemiological characteristics of yellow fever in Brazil in the period 2000-2012. METHODS: this is a descriptive ecological epidemiological study, using information from Ministry of Health databases. RESULTS: 326 cases of yellow fever were confirmed in Brazil during this period, with 156 deaths and an average case fatality rate of 47.8%; the young male adult age group was the most affected; in epizootic terms, 2,856 suspected cases of yellow fever in non-human primates were reported and 31...
January 2016: Epidemiologia e Servicos de Saude: Revista do Sistema Unico de Saude do Brasil
https://www.readbyqxmd.com/read/27853521/zika-mosquito-vectors-the-jury-is-still-out
#11
Walter S Leal
After a 40-year hiatus, the International Congress of Entomology (ICE 2016) convened in Orlando, Florida (September 25-30, 2016). One of the symposia at ICE 2016, the Zika Symposium, covered multiple aspects of the Zika epidemic, including epidemiology, sexual transmission, genetic tools for reducing transmission, and particularly vector competence. While there was a consensus among participants that the yellow fever mosquito, Aedes aegypti, is a vector of the Zika virus, there is growing evidence indicating that the range of mosquito vectors might be wider than anticipated...
2016: F1000Research
https://www.readbyqxmd.com/read/27849599/yellow-fever-virus-capsid-protein-is-a-potent-suppressor-of-rna-silencing-that-binds-double-stranded-rna
#12
Glady Hazitha Samuel, Michael R Wiley, Atif Badawi, Zach N Adelman, Kevin M Myles
Mosquito-borne flaviviruses, including yellow fever virus (YFV), Zika virus (ZIKV), and West Nile virus (WNV), profoundly affect human health. The successful transmission of these viruses to a human host depends on the pathogen's ability to overcome a potentially sterilizing immune response in the vector mosquito. Similar to other invertebrate animals and plants, the mosquito's RNA silencing pathway comprises its primary antiviral defense. Although a diverse range of plant and insect viruses has been found to encode suppressors of RNA silencing, the mechanisms by which flaviviruses antagonize antiviral small RNA pathways in disease vectors are unknown...
November 14, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27843160/reining-in-angola-s-yellow-fever-outbreak
#13
(no author information available yet)
Rosa Moreira tells Andréia Azevedo Soares how Angola reined in its worst yellow fever epidemic in 30 years.
October 1, 2016: Bulletin of the World Health Organization
https://www.readbyqxmd.com/read/27836744/dynamic-expression-of-genes-encoding-subunits-of-inward-rectifier-potassium-kir-channels-in-the-yellow-fever-mosquito-aedes-aegypti
#14
Zhongxia Yang, Bethanie-Michelle Statler, Travis L Calkins, Edna Alfaro, Carlos J Esquivel, Matthew F Rouhier, Jerod S Denton, Peter M Piermarini
Inward rectifier potassium (Kir) channels play fundamental roles in neuromuscular, epithelial, and endocrine function in mammals. Recent research in insects suggests that Kir channels play critical roles in the development, immune function, and excretory physiology of fruit flies and/or mosquitoes. Moreover, our group has demonstrated that mosquito Kir channels may serve as valuable targets for the development of novel insecticides. Here we characterize the molecular expression of 5 mRNAs encoding Kir channel subunits in the yellow fever mosquito, Aedes aegypti: Kir1, Kir2A-c, Kir2B, Kir2B', and Kir3...
November 9, 2016: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/27829655/cuba-time-to-expand-health-in-all-policies
#15
Pastor Castell-Florit Serrate, Pedro Más-Bermejo
The Adelaide Statement on Health in All Policies (2010), lays out equity-based principles designed to guide policymakers on incorporating health and well-being components into the development, implementation and evaluation of policy and practice while moving towards shared governance at all levels-local, regional, national and international. Special emphasis is placed on cross-sector coordination to achieve policy goals, while improving health and well-being for all.[1] In Cuba's case, experience in disaster preparedness, particularly for hurricanes, has shown good cross-sector coordination...
October 2016: MEDICC Review
https://www.readbyqxmd.com/read/27824100/identification-of-a-new-broadly-cross-reactive-epitope-within-domain-iii-of-the-duck-tembusu-virus-e-protein
#16
Chenxi Li, Xiaofei Bai, Runze Meng, Wulin Shaozhou, Qingshan Zhang, Ronghong Hua, Jyung-Hurng Liu, Ming Liu, Yun Zhang
In 2010, a pathogenic flavivirus termed duck Tembusu virus (DTMUV) caused widespread outbreak of egg-drop syndrome in domesticated ducks in China. Although the glycoprotein E of DTMUV is an important structural component of the virus, the B-cell epitopes of this protein remains uncharacterized. Using phage display and mutagenesis, we identified a minimal B-cell epitope, (374)EXE/DPPFG(380), that mediates binding to a nonneutralizing monoclonal antibody. DTMUV-positive duck serum reacted with the epitope, and amino acid substitutions revealed the specific amino acids that are essential for antibody binding...
November 8, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27818122/isolation-and-characterization-of-a-brazilian-strain-of-yellow-fever-virus-from-an-epizootic-outbreak-in-2009
#17
Taissa Ricciardi Jorge, Ana Luiza Pamplona Mosimann, Lucia de Noronha, Angela Maron, Claudia Nunes Duarte Dos Santos
During a series of epizootics caused by Yellow fever virus in Brazil between 2007 and 2009, a monkey was found dead (May 2009) in a sylvatic area in the State of Paraná. Brain samples from this animal were used for immunohistochemical analysis and isolation of a wild-type strain of YFV. This viral strain was characterized, and sequence analyzes demonstrated that it is closely related with YFV strains of the recently identified subclade 1E of the South American genotype I. Further characterization included indirect-immunofluorescence of different infected cell lines and analysis of the kinetics of virus replication and infectivity inhibition by type I IFN...
November 3, 2016: Acta Tropica
https://www.readbyqxmd.com/read/27814732/detection-of-dengue-virus-serotypes-1-2-and-3-in-selected-regions-of-kenya-2011-2014
#18
Limbaso Konongoi, Victor Ofula, Albert Nyunja, Samuel Owaka, Hellen Koka, Albina Makio, Edith Koskei, Fredrick Eyase, Daniel Langat, Randal J Schoepp, Cynthia Ann Rossi, Ian Njeru, Rodney Coldren, Rosemary Sang
BACKGROUND: Dengue fever, a mosquito-borne disease, is associated with illness of varying severity in countries in the tropics and sub tropics. Dengue cases continue to be detected more frequently and its geographic range continues to expand. We report the largest documented laboratory confirmed circulation of dengue virus in parts of Kenya since 1982. METHODS: From September 2011 to December 2014, 868 samples from febrile patients were received from hospitals in Nairobi, northern and coastal Kenya...
November 4, 2016: Virology Journal
https://www.readbyqxmd.com/read/27812357/emergence-and-spreading-potential-of-zika-virus
#19
REVIEW
Álvaro Fajardo, Juan Cristina, Pilar Moreno
Zika virus (ZIKV) is an arthropod-borne Flavivirus (family Flaviviridae) closely related to dengue, yellow fever and West Nile viruses. ZIKV remained neglected, confined to enzootic transmission cycles in Africa and Asia, until the first significant outbreak was reported in Micronesia in 2007. Subsequent epidemics of growing incidence occurred in French Polynesia and other South Pacific Islands, and recently, in the Americas. The latter and currently ongoing outbreak of unprecedented incidence revealed the association of ZIKV infection with the occurrence of severe congenital malformations and neurological diseases, leading to a widespread concern about its potential to pose a global public health threat...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27809228/sodium-channel-mutations-and-pyrethroid-resistance-in-aedes-aegypti
#20
REVIEW
Yuzhe Du, Yoshiko Nomura, Boris S Zhorov, Ke Dong
Pyrethroid insecticides are widely used to control insect pests and human disease vectors. Voltage-gated sodium channels are the primary targets of pyrethroid insecticides. Mutations in the sodium channel have been shown to be responsible for pyrethroid resistance, known as knockdown resistance (kdr), in various insects including mosquitoes. In Aedes aegypti mosquitoes, the principal urban vectors of dengue, zika, and yellow fever viruses, multiple single nucleotide polymorphisms in the sodium channel gene have been found in pyrethroid-resistant populations and some of them have been functionally confirmed to be responsible for kdr in an in vitro expression system, Xenopus oocytes...
October 31, 2016: Insects
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