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https://www.readbyqxmd.com/read/28293130/treatment-of-tungiasis-with-a-two-component-dimeticone-a-comparison-between-moistening-the-whole-foot-and-directly-targeting-the-embedded-sand-fleas
#1
Per Nordin, Marlene Thielecke, Nicholas Ngomi, George Mukone Mudanga, Ingela Krantz, Hermann Feldmeier
BACKGROUND: Tungiasis (sand flea disease) is caused by the penetration of female sand fleas (Tunga penetrans, Siphonaptera) into the skin. It belongs to the neglected tropical diseases and is prevalent in South America, the Caribbean and sub-Saharan Africa. Tungiasis predominantly affects marginalized populations and resource-poor communities in both urban and rural areas. In the endemic areas, patients do not have access to an effective and safe treatment. A proof-of-principle study in rural Kenya has shown that the application of a two-component dimeticone (NYDA®) which is a mixture of two low viscosity silicone oils caused almost 80% of the embedded sand fleas to lose their viability within 7 days...
2017: Tropical Medicine and Health
https://www.readbyqxmd.com/read/28291601/molecular-detection-of-hepatozoon-spp-in-domestic-dogs-and-wild-mammals-in-southern-pantanal-brazil-with-implications-in-the-transmission-route
#2
Keyla Carstens Marques de Sousa, Marina Pugnaghi Fernandes, Heitor Miraglia Herrera, Jyan Lucas Benevenute, Filipe Martins Santos, Fabiana Lopes Rocha, Wanessa Teixeira Gomes Barreto, Gabriel Carvalho Macedo, João Bosco Campos, Thiago Fernandes Martins, Pedro Cordeiro Estrela de Andrade Pinto, Darci Barros Battesti, Eliane Mattos Piranda, Paulo Henrique Duarte Cançado, Rosangela Zacarias Machado, Marcos Rogério André
Hepatozoon parasites comprise intracellular apicomplexan parasites transmitted to vertebrate animals by ingestion of arthropods definitive hosts. The present work aimed to investigate the occurrence of Hepatozoon spp. in wild animals, domestic dogs and their respective ectoparasites, in southern Pantanal region, central-western Brazil, by molecular techniques. Between August 2013 and March 2015, 31 coatis (Nasua nasua), 78 crab-eating foxes (Cerdocyon thous), seven ocelots (Leopardus pardalis), 42 dogs (Canis lupus familiaris), 110 wild rodents (77 Thichomys fosteri, 25 Oecomys mamorae, and 8 Clyomys laticeps), 30 marsupials (14 Thylamys macrurus, 11 Gracilinanus agilis, 4 Monodelphis domestica and 1 Didelphis albiventris), and 1582 ticks and 80 fleas collected from the sampled animals were investigated...
February 22, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28289743/molecular-modeling-and-structural-characterization-of-a-high-glycine-tyrosine-hair-keratin-associated-protein
#3
Rakesh S Singh, Jeremy C Palmer, Paul D A Pudney, Prem K C Paul, Christian Johannessen, Pablo G Debenedetti, Janhavi Raut, Ken Lee, Massimo Noro, David Tiemessen
High glycine-tyrosine (HGT) proteins are an important constituent of the keratin associated proteins (KAPs) present in human hair. The glassy state physics of hair fibres are thought to be largely regulated by KAPs, which exist in an amorphous state and are readily affected by environmental conditions. However, there are no studies characterizing the individual KAPs. In this paper, we present the first step to fill this gap by computational modeling and experimental studies on a HGT protein, KAP8.1. In particular, we have modeled the three-dimensional structure of this 63-residue protein using homology information from an anti-freeze protein in snow flea...
March 14, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28288759/feline-and-canine-leishmaniosis-and-other-vector-borne-diseases-in-the-aeolian-islands-pathogen-and-vector-circulation-in-a-confined-environment
#4
Domenico Otranto, Ettore Napoli, Maria Stefania Latrofa, Giada Annoscia, Viviana Domenica Tarallo, Grazia Greco, Eleonora Lorusso, Laura Gulotta, Luigi Falsone, Fabrizio Solari Basano, Maria Grazia Pennisi, Katrin Deuster, Gioia Capelli, Filipe Dantas-Torres, Emanuele Brianti
Vector-borne diseases (VBDs) are prevalently investigated in dogs. Studies on feline VBDs are scant, though feline leishmaniosis (FeL) is increasingly recognised as a disease of cats in endemic areas. Comprehensive investigations on the distribution of VBDs in populations of cats and dogs living in relatively small geographical areas, such as islands, are currently lacking. In this study the prevalence of Leishmania infantum and other VBD pathogens was assessed in cohorts of cats and dogs living in the Aeolian Islands...
March 15, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28285590/molecular-detection-of-hepatozoon-spp-and-cytauxzoon-sp-in-domestic-and-stray-cats-from-madrid-spain
#5
David Díaz-Regañón, Alejandra Villaescusa, Tania Ayllón, Fernando Rodríguez-Franco, Gad Baneth, Lydia Calleja-Bueno, Mercedes García-Sancho, Beatriz Agulla, Ángel Sainz
BACKGROUND: Different species of apicomplexan protozoans of the genera Hepatozoon and Cytauxzoon can infect domestic cats, but their epidemiology and clinical relevance are not fully understood. The aim of this study was to assess the molecular prevalence of Hepatozoon spp. and Cytauxzoon spp. and to identify associated risk factors and clinical and laboratory abnormalities in a population of cats from Madrid, Spain. METHODS: Six hundred and forty-four client-owned and stray cats from Madrid, Spain, were included in this study...
March 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28285586/serological-evidence-of-exposure-to-rickettsia-felis-and-rickettsia-typhi-in-australian-veterinarians
#6
Yen Thon Teoh, Sze Fui Hii, Mark A Stevenson, Stephen Graves, Robert Rees, John Stenos, Rebecca J Traub
BACKGROUND: Rickettsia felis and Rickettsia typhi are emerging arthropod-borne zoonoses causing fever and flu-like symptoms. Seroprevalence and risk factors associated with exposure to these organisms was explored in Australian veterinarians. METHODS: One hundred and thirty-one veterinarians from across Australia were recruited to participate in a cross-sectional survey. Veterinarians provided a single blood sample and answered a questionnaire on potential risk factors influencing their exposure to R...
March 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28285500/a-human-case-of-zoonotic-dog-tapeworm-dipylidium-caninum-eucestoda-dilepidiidae-in-china
#7
Peng Jiang, Xi Zhang, Ruo Dan Liu, Zhong Quan Wang, Jing Cui
We described a human case of zoonotic dog tapeworm, Dipylidium caninum (Eucestoda: Dilepidiidae), rarely occurring in China. The mother of a 17 month-old boy noted the appearance of small white and active worms over a month period in her son's feces, but the boy was asymptomatic except mild diarrhea. We observed 3 tapeworm proglottids resembling cucumber seeds in his stool sample. Microscopically, each proglottid had 2 genital pores, 1 on each lateral edge, and numerous egg capsules in the uterus. The patient was successfully treated with a single oral dose of praziquantel...
February 2017: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/28283645/natural-flea-repellents
#8
(no author information available yet)
No abstract text is available yet for this article.
March 11, 2017: Veterinary Record
https://www.readbyqxmd.com/read/28274808/diversity-of-rickettsiae-in-a-rural-community-in-northern-california
#9
Nicole Stephenson, Alexandra Blaney, Deana Clifford, Mourad Gabriel, Greta Wengert, Patrick Foley, Richard N Brown, Mark Higley, Sarah Buckenberger-Mantovani, Janet Foley
Far northern California forests are highly biodiverse in wildlife reservoirs and arthropod vectors that may propagate rickettsial pathogens in nature. The proximity of small rural communities to these forests puts people and domestic animals at risk of vector-borne infection due to spillover from wildlife. The current study was conducted to document exposure to rickettsial pathogens in people and domestic animals in a rural community, and identify which rickettsiae are present in sylvatic and peri-domestic environments near this community...
February 27, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28264405/a-finding-at-the-natural-history-museum-of-florence-affords-the-holotype-designation-of-i-orchestia-stephenseni-i-cecchini-1928-crustacea-amphipoda-talitridae
#10
Sabrina Lo Brutto
The beach flea Orchestia stephenseni has been originally described by Cecchini twice (1928, 1929) from the La Spezia type locality (northern Tyrrhenian Sea, Italy), and successively re-described by Karaman (1973) and Iaciofano & Lo Brutto (2016).
February 13, 2017: Zootaxa
https://www.readbyqxmd.com/read/28264003/significance-of-major-international-seaports-in-the-distribution-of-murine-typhus-in-taiwan
#11
Chi-Chien Kuo, Nicola Wardrop, Chung-Te Chang, Hsi-Chieh Wang, Peter M Atkinson
BACKGROUND: International seaports are hotspots for disease invasion and pathogens can persist in seaports even after ports are abandoned. Transmitted by fleas infected by Rickettsia typhi, murine typhus, a largely neglected and easily misdiagnosed disease, is known to occur primarily in large seaports. However, the significance of seaports in the occurrence of murine typhus has never been validated quantitatively. METHODOLOGY/PRINCIPAL FINDINGS: We studied the spatial distribution of murine typhus, a notifiable disease, in Taiwan...
March 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28263529/ecotoxicity-of-selected-antibiotics-for-organisms-of-aquatic-and-terrestrial-ecosystems
#12
Barbora Havelkova, Miroslava Beklova, Veronika Kovacova, Daniela Hlavkova, Jiri Pikula
OBJECTIVES: The aim of this study was to assess the ecotoxicity of selected antibiotics (i.e. penicillin G, vancomycin and tetracycline) using ecotoxicological tests. Tests were conducted on organisms representing all trophic levels of the aquatic ecosystem, namely producers (green freshwater algae Pseudokirchneriella subcapitata), consumers (water fleas Daphnia magna) and decomposers (bacteria Vibrio fischeri). The effect of antibiotics on the representative of edaphon was measured by testing the inhibition of the reproduction of springtails Folsomia candida and earthworms Eisenia fetida...
December 18, 2016: Neuro Endocrinology Letters
https://www.readbyqxmd.com/read/28259176/molecular-and-serological-evidence-of-flea-associated-typhus-group-and-spotted-fever-group-rickettsial-infections-in-madagascar
#13
Rado J L Rakotonanahary, Alan Harrison, Alice N Maina, Ju Jiang, Allen L Richards, Minoarisoa Rajerison, Sandra Telfer
BACKGROUND: Rickettsiae are obligate intracellular bacteria responsible for many febrile syndromes around the world, including in sub-Saharan Africa. Vectors of these pathogens include ticks, lice, mites and fleas. In order to assess exposure to flea-associated Rickettsia species in Madagascar, human and small mammal samples from an urban and a rural area, and their associated fleas were tested. RESULTS: Anti-typhus group (TGR)- and anti-spotted fever group rickettsiae (SFGR)-specific IgG were detected in 24 (39%) and 21 (34%) of 62 human serum samples, respectively, using indirect ELISAs, with six individuals seropositive for both...
March 4, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28257423/mechanism-study-on-a-plague-outbreak-driven-by-the-construction-of-a-large-reservoir-in-southwest-china-surveillance-from-2000-2015
#14
Xin Wang, Xiaoyu Wei, Zhizhong Song, Mingliu Wang, Jinxiao Xi, Junrong Liang, Yun Liang, Ran Duan, Kecheng Tian, Yong Zhao, Guangpeng Tang, Lv You, Guirong Yang, Xuebin Liu, Yuhuang Chen, Jun Zeng, Shengrong Wu, Shoujun Luo, Gang Qin, Huijing Hao, Huaiqi Jing
BACKGROUND: Plague, a Yersinia pestis infection, is a fatal disease with tremendous transmission capacity. However, the mechanism of how the pathogen stays in a reservoir, circulates and then re-emerges is an enigma. METHODOLOGY/PRINCIPAL FINDINGS: We studied a plague outbreak caused by the construction of a large reservoir in southwest China followed 16-years' surveillance. CONCLUSIONS/SIGNIFICANCE: The results show the prevalence of plague within the natural plague focus is closely related to the stability of local ecology...
March 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28197898/prevalence-and-phylogenetic-analysis-of-bartonella-species-of-wild-carnivores-and-their-fleas-in-northwestern-mexico
#15
A M López-Pérez, L Osikowicz, Y Bai, J Montenieri, A Rubio, K Moreno, K Gage, G Suzán, M Kosoy
The host-parasite-vector relationship of Bartonella spp. system in wild carnivores and their fleas from northwestern Mexico was investigated. Sixty-six carnivores belonging to eight species were sampled, and 285 fleas belonging to three species were collected during spring (April-May) and fall (October-November) seasons. We detected Bartonella species in 7 carnivores (10.6%) and 27 fleas (9.5%) through either blood culture or PCR. Of the 27 Bartonella-positive fleas, twenty-two were Pulex simulans, three were Pulex irritans and one was Echidnophaga gallinacea...
February 14, 2017: EcoHealth
https://www.readbyqxmd.com/read/28193869/perplexing-cooperative-folding-and-stability-of-a-low-sequence-complexity-polyproline-2-protein-lacking-a-hydrophobic-core
#16
Zachary P Gates, Michael C Baxa, Wookyung Yu, Joshua A Riback, Hui Li, Benoît Roux, Stephen B H Kent, Tobin R Sosnick
The burial of hydrophobic side chains in a protein core generally is thought to be the major ingredient for stable, cooperative folding. Here, we show that, for the snow flea antifreeze protein (sfAFP), stability and cooperativity can occur without a hydrophobic core, and without α-helices or β-sheets. sfAFP has low sequence complexity with 46% glycine and an interior filled only with backbone H-bonds between six polyproline 2 (PP2) helices. However, the protein folds in a kinetically two-state manner and is moderately stable at room temperature...
February 28, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28193637/jumping-performance-of-flea-hoppers-and-other-mirid-bugs-hemiptera-miridae
#17
M Burrows, M Dorosenko
The order Hemiptera includes jumping insects with the fastest take-off velocities, all generated by catapult mechanisms. It also contains the large family Miridae or plant bugs. Here we analysed the jumping strategies and mechanisms of six mirid species from high speed videos and from the anatomy of their propulsive legs and conclude that they use a different mechanism in which jumps are powered by the direct contractions of muscles. Three strategies were identified. First, jumping was propelled only by movements of the middle and hind legs which were respectively 140% and 190% longer than the front legs...
February 13, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28189099/miniaturising-acute-toxicity-and-feeding-rate-measurements-in-daphnia-magna
#18
Konstantinos Grintzalis, Wenkui Dai, Konstantinos Panagiotidis, Alexia Belavgeni, Mark R Viant
Phenotypic markers of animal health form an essential component of regulatory toxicology. Immobilisation of neonate water fleas - Daphnia magna - as a surrogate measure of their mortality following exposure to a chemical for 24-48h forms the basis of the internationally utilised OECD acute toxicity test 202. A second important marker of animal physiology and health is feeding rate, which in Daphnia is determined by measuring the algae feeding rate. Given the widespread use of OECD test 202 for acute toxicity as well as the quantification of feeding rate in toxicological studies of daphniids, significant benefits could result from miniaturising this assay...
February 8, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28165869/a-field-study-of-plague-and-tularemia-in-rodents-western-iran
#19
Ehsan Mostafavi, Abdolrazagh Hashemi Shahraki, Alireza Japoni-Nejad, Saber Esmaeili, Jamshid Darvish, Mohammad Mehdi Sedaghat, Ali Mohammadi, Zeinolabedin Mohammadi, Ahmad Mahmoudi, Behzad Pourhossein, Ahmad Ghasemi, Miklós Gyuranecz, Elisabeth Carniel
INTRODUCTION: Kurdistan Province in Iran is a historical focus for plague and tularemia. This study aimed at assessing the current status of these two foci by studying their rodent reservoirs. MATERIALS AND METHODS: Rodents were trapped and their ectoparasites were collected. The genus and species of both rodents and ectoparasites were determined. Serological analyses of rodent blood samples were done by enzyme-linked immunosorbent assay for plague and by standard tube agglutination assay for tularemia...
February 6, 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28150014/dynamics-of-co-infection-with-bartonella-henselae-genotypes-i-and-ii-in-naturally-infected-cats-implications-for-feline-vaccine-development
#20
Camille Huwyler, Nadja Heiniger, Bruno B Chomel, Minsoo Kim, Rickie W Kasten, Jane E Koehler
Bartonella henselae is an emerging bacterial pathogen causing cat-scratch disease and potentially fatal bacillary angiomatosis in humans. Bacteremic cats constitute a large reservoir for human infection. Although feline vaccination is a potential strategy to prevent human infection, selection of appropriate B. henselae strains is critical for successful vaccine development. Two distinct genotypes of B. henselae (type I, type II) have been identified and are known to co-infect the feline host, but very little is known about the interaction of these two genotypes during co-infection in vivo...
February 2, 2017: Microbial Ecology
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