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Sreedhar R Tummalapalli, Rohit Bhat, Agnieszka Chojnowski, Monika Prorok, Tamara Kreiss, Ronald Goldberg, Stacie Canan, Natalie Hawryluk, Deborah Mortensen, Vikram Khetani, Jerome Zeldis, John J Siekierka, David P Rotella
Lymphatic filariasis infects over 120 million people worldwide and can lead to significant disfigurement and disease. Resistance is emerging with current treatments, and these therapies have dose limiting adverse events; consequently new targets are needed. One approach to achieve this goal is inhibition of parasitic protein kinases involved in circumventing host defense mechanisms. This report describes structure-activity relationships leading to the identification of a potent, orally bioavailable stress activated protein kinase inhibitor that may be used to investigate this hypothesis...
March 8, 2018: ACS Medicinal Chemistry Letters
Alison Krentel, Kaye Wellings
BACKGROUND: The Global Programme to Eliminate Lymphatic Filariasis has set 2020 as a target to eliminate lymphatic filariasis (LF) as a public health problem through mass drug administration (MDA) to all eligible people living in endemic areas. To obtain a better understanding of compliance with LF treatment, a qualitative study using 43 in-depth interviews was carried out in Alor District, Indonesia to explore factors that motivate uptake of LF treatment, including the social and behavioural differences between compliant and non-compliant individuals...
March 12, 2018: Parasites & Vectors
Kimberly Y Won, Keri Robinson, Katy L Hamlin, Joseph Tufa, Margaret Seespesara, Ryan E Wiegand, Katherine Gass, Joseph Kubofcik, Thomas B Nutman, Patrick J Lammie, Saipale Fuimaono
BACKGROUND: Current WHO recommendations for lymphatic filariasis (LF) surveillance advise programs to implement activities to monitor for new foci of transmission after stopping mass drug administration (MDA). A current need in the global effort to eliminate LF is to standardize diagnostic tools and surveillance activities beyond the recommended transmission assessment survey (TAS). METHODOLOGY: TAS was first conducted in American Samoa in 2011 (TAS 1) and a repeat TAS was carried out in 2015 (TAS 2)...
March 9, 2018: PLoS Neglected Tropical Diseases
Rabih Darwiche, Fernanda Lugo, Claire Drurey, Koen Varossieau, Geert Smant, Ruud H P Wilbers, Rick M Maizels, Roger Schneiter, Oluwatoyin A Asojo
Brugia malayi is a causative agent of lymphatic filariasis, a major tropical disease. The infective L3 parasite stage releases immunomodulatory proteins including the venom allergen-like proteins (VALs), which are members of the SCP/TAPS (Sperm-coating protein / Tpx / antigen 5 / pathogenesis related-1 / Sc7) superfamily. BmVAL-1 is a major target of host immunity with >90% of infected B. malayi microfilaraemic cases being seropositive for antibodies to BmVAL-1. This study is part of ongoing efforts to characterize the structures and functions of important B...
February 28, 2018: International Journal for Parasitology
Joseph Kamgno, Hugues C Nana-Djeunga, Sébastien D Pion, Cédric B Chesnais, Amy D Klion, Charles D Mackenzie, Thomas B Nutman, Michel Boussinesq
After 30 years of treatment with Mectizan (ivermectin), cutaneous and ocular complications of Onchocerca volvulus infection are now scarce in endemic communities. Indeed, transmission has been interrupted and the O. volvulus- associated disease has disappeared in some African foci. Despite this success, onchocerciasis elimination in Loa loa co-endemic areas is still constrained by severe adverse events (SAEs) occurring after ivermectin treatment in some individuals harbouring very high L. loa microfilaremia...
March 1, 2018: International Health
Virak Khieu, Vandine Or, Chhakda Tep, Peter Odermatt, Reiko Tsuyuoka, Meng Chuor Char, Molly A Brady, Joshua Sidwell, Aya Yajima, Rekol Huy, Kapa D Ramaiah, Sinuon Muth
BACKGROUND: Endemicity of lymphatic filariasis (LF) in Cambodia was proven in 1956 when microfilariae were detected in mosquitos in the Kratié province. In 2001, an extensive study confirmed the presence of both Brugia malayi and Wuchereria bancrofti microfilariae. In 2003, the Ministry of Health established a national task force to develop policies and strategies for controlling and eliminating neglected tropical diseases (NTDs), with the goal of eliminating LF by 2015. This article summarizes the work accomplished to eliminate LF as a public health problem in Cambodia...
February 20, 2018: Infectious Diseases of Poverty
Mateusz M Plucinski, Baltazar Candrinho, Geraldo Chambe, João Muchanga, Olinda Muguande, Graça Matsinhe, Guidion Mathe, Eric Rogier, Timothy Doyle, Rose Zulliger, James Colborn, Abu Saifodine, Patrick Lammie, Jeffrey W Priest
BACKGROUND: Universal coverage with long-lasting insecticidal nets (LLINs) is a primary control strategy against Plasmodium falciparum malaria. However, its impact on the three other main species of human malaria and lymphatic filariasis (LF), which share the same vectors in many co-endemic areas, is not as well characterized. The recent development of multiplex antibody detection provides the opportunity for simultaneous evaluation of the impact of control measures on the burden of multiple diseases...
February 14, 2018: PLoS Neglected Tropical Diseases
Collins S K Ahorlu, Eric Koka, Susan Adu-Amankwah, Joseph Otchere, Dziedzom Komi de Souza
BACKGROUND: The Global Program for the Elimination of Lymphatic Filariasis (GPELF) started operation in 2000 and aimed at eliminating the disease by the year 2020, following 5-6 rounds of effective annual Mass Drug Administration (MDA). The MDA programme took off in Ghana in 2001 and has interrupted transmission in many areas while it has persisted in some areas after 10 or more rounds of MDA. This study was to appreciate community members' perspectives on MDA after over 15 years of implementation...
February 13, 2018: BMC Public Health
Denise Mupfasoni, Alexei Mikhailov, Pamela Mbabazi, Jonathan King, Theresa W Gyorkos, Antonio Montresor
BACKGROUND: Soil-transmitted helminth infections are among the most common infections in developing countries. Globally, as many as 2 billion people are considered to be at risk for soil-transmitted-helminth (STH) infections. Preschool children (PSAC), school-age children (SAC) and women of reproductive age (WRA) are at high risk of STH-attributable morbidity and preventive chemotherapy (PC) for STH is recommended by the World health Organization (WHO). METHODOLOGY/PRINCIPAL FINDINGS: Over the last five years, PC coverage in PSAC and SAC has gradually increased, while coverage in WRA has lagged...
February 12, 2018: PLoS Neglected Tropical Diseases
Rajkuberan Chandrasekaran, Prabukumar Seetharaman, Muthukumar Krishnan, Sathishkumar Gnanasekar, Sivaramakrishnan Sivaperumal
This study manifests the larvicidal efficacy of Carica papaya latex extract and silver nanoparticles (CPAgNPs) synthesized using latex, against developing immature juveniles of Aedes aegypti and Culex quinquefasciatus. Briefly, the latex was collected and fractioned with different solvents such as chloroform, methanol and aqueously. The obtained crude extracts were subjected to larvicidal activity in the dose-dependent method. After 24 h, the mortality rate was calculated and statistically analyzed. From the results, it was demonstrated that the chloroform extract displayed prominent activity in IInd and IIIrd instar larvae of A...
February 2018: 3 Biotech
Sung Hye Kim, Milika Rinamalo, Meleresita Rainima-Qaniuci, Nemani Talemaitoga, Mike Kama, Eric Rafai, John H Lowry, Min-Ho Choi, Sung-Tae Hong, Jaco J Verweij, Louise Kelly-Hope, John Russell Stothard
As part of lymphatic filariasis (LF) transmission assessment surveys (TAS) on Fiji, an island-wide assessment of gastrointestinal protozoan infection was performed through concomitant stool sample collections to investigate the distribution of the protozoan infection. All grade 1 and 2 students of 69 schools in the two main islands were targeted in two phases (one in the Western Division and the other in the Central and Northern, except Taveuni sub-Division of Northern), where fecal samples of 1,800 students were available for coproscopy using the formalin-ether-acetate concentration...
February 5, 2018: American Journal of Tropical Medicine and Hygiene
Benjamin G Koudou, Dziedzom K de Souza, Nana-Kwadwo Biritwum, Roland Bougma, Meite Aboulaye, Elizabeth Elhassan, Simon Bush, David H Molyneux
Lymphatic filariasis in Africa is caused by the parasite Wuchereria bancrofti and remains a major cause of morbidity and disability in 74 countries globally. A key strategy of the Global Programme for the Elimination of Lymphatic Filariasis, which has a target elimination date of 2020, is the treatment of entire endemic communities through mass drug administration of albendazole in combination with either ivermectin or diethylcarbamazine. Although the strategy of mass drug administration in combination with other interventions, such as vector control, has led to elimination of the infection and its transmission in many rural communities, urban areas in west Africa present specific challenges to achieving the 2020 targets...
February 2, 2018: Lancet Infectious Diseases
Lukyn M Gedge, Alison A Bettis, Mark H Bradley, T Déirdre Hollingsworth, Hugo C Turner
In 2000, the World Health Organization established the Global Programme to Eliminate Lymphatic Filariasis (GPELF), with the goal of eliminating the disease as a public health problem by 2020. Since the start of the programme, a cumulative total of 6.2 billion treatments have been delivered to affected populations - with more than 556 million people treated in 2015 alone. In this paper, we perform a rigorous systematic review of the economic evaluations of lymphatic filariasis interventions have been conducted...
February 1, 2018: Parasites & Vectors
Indu Malhotra, A Desiree LaBeaud, Nathan Morris, Maxim McKibben, Peter Mungai, Eric Muchiri, Christopher L King, Charles H King
Background: Antenatal exposure to parasites can affect infants' subsequent responses to vaccination. The present study investigated how maternal prenatal infections and newborns' anti-parasite cytokine profiles relate to IgG responses to standard vaccination during infancy. Methods: 450 Kenyan women were tested for parasitic infections during pregnancy. Their newborns' responses to malaria, schistosome, and filaria antigens were assessed in cord blood (CB) lymphocytes...
January 30, 2018: Journal of Infectious Diseases
Arvind Singh Kushwaha, K C Verma, M P Cariappa
Background: Routine annual filarial surveys are conducted amongst various categories of military personnel and their families as per policies in vogue in the Armed Forces. The neglect and inattention faced by this disease needs to be addressed in terms of policy, provisioning and processes while dealing with filariasis in the Armed Forces. Methods: Routine annual filarial survey was conducted in a garrison during the months of Nov and Dec in 2013 and 2014. Blood slides from 6305 and 10,162 persons were collected in 2013 and 2014 respectively...
October 2017: Medical Journal, Armed Forces India
Michael A Irvine, James W Kazura, T Deirdre Hollingsworth, Lisa J Reimer
It is well known that individuals in the same community can be exposed to a highly variable number of mosquito bites. This heterogeneity in bite exposure has consequences for the control of vector-borne diseases because a few people may be contributing significantly to transmission. However, very few studies measure sources of heterogeneity in a way which is relevant to decision-making. We investigate the relationship between two classic measures of heterogeneity, spatial and individual, within the context of lymphatic filariasis, a parasitic mosquito-borne disease...
January 31, 2018: Proceedings. Biological Sciences
Jorge Cano, Maria-Gloria Basáñez, Simon J O'Hanlon, Afework H Tekle, Samuel Wanji, Honorat G Zouré, Maria P Rebollo, Rachel L Pullan
BACKGROUND: Onchocerciasis and lymphatic filariasis (LF) are major filarial infections targeted for elimination in most endemic sub-Saharan Africa (SSA) countries by 2020/2025. The current control strategies are built upon community-directed mass administration of ivermectin (CDTI) for onchocerciasis, and ivermectin plus albendazole for LF, with evidence pointing towards the potential for novel drug regimens. When distributing microfilaricides however, considerable care is needed to minimise the risk of severe adverse events (SAEs) in areas that are co-endemic for onchocerciasis or LF and loiasis...
January 31, 2018: Parasites & Vectors
James E Wright, Marleen Werkman, Julia C Dunn, Roy M Anderson
BACKGROUND: The human helminth infections include ascariasis, trichuriasis, hookworm infections, schistosomiasis, lymphatic filariasis (LF) and onchocerciasis. It is estimated that almost 2 billion people worldwide are infected with helminths. Whilst the WHO treatment guidelines for helminth infections are mostly aimed at controlling morbidity, there has been a recent shift with some countries moving towards goals of disease elimination through mass drug administration, especially for LF and onchocerciasis...
January 31, 2018: Parasites & Vectors
Joseph Pryce, Hayley E Mableson, Ramesh Choudhary, Basu Dev Pandey, Dambar Aley, Hannah Betts, Charles D Mackenzie, Louise A Kelly-Hope, Hugh Cross
BACKGROUND: Lymphatic filariasis (LF) and leprosy are disabling infectious diseases endemic in Nepal. LF infection can lead to lymphoedema and hydrocoele, while secondary effects of leprosy infection include impairments to hands, eyes and feet. The disabling effects of both conditions can be managed through self-care and the supportive effects of self-help groups (SHGs). A network of SHGs exists for people affected by leprosy in four districts in Nepal's Central Development Region, however no such service exists for people affected by LF...
January 30, 2018: BMC Public Health
Noé Patrick M'bondoukwé, Eric Kendjo, Denise Patricia Mawili-Mboumba, Jeanne Vanessa Koumba Lengongo, Christelle Offouga Mbouoronde, Dieudonné Nkoghe, Fousseyni Touré, Marielle Karine Bouyou-Akotet
BACKGROUND: Malaria, filariasis, and intestinal parasitic infections (IPIs) are common and frequently overlap in developing countries. The prevalence and predictors of these infections were investigated in three different settlements (rural, semi-urban, and urban) of Gabon. METHODS: During cross-sectional surveys performed from September 2013 to June 2014, 451 individuals were interviewed. In addition, blood and stool samples were analysed for the presence of Plasmodium, filarial roundworm, intestinal protozoan, and helminth infections...
January 30, 2018: Infectious Diseases of Poverty
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