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https://www.readbyqxmd.com/read/28098813/reverse-vaccinology-an-approach-for-identifying-leptospiral-vaccine-candidates
#1
REVIEW
Odir A Dellagostin, André A Grassmann, Caroline Rizzi, Rodrigo A Schuch, Sérgio Jorge, Thais L Oliveira, Alan J A McBride, Daiane D Hartwig
Leptospirosis is a major public health problem with an incidence of over one million human cases each year. It is a globally distributed, zoonotic disease and is associated with significant economic losses in farm animals. Leptospirosis is caused by pathogenic Leptospira spp. that can infect a wide range of domestic and wild animals. Given the inability to control the cycle of transmission among animals and humans, there is an urgent demand for a new vaccine. Inactivated whole-cell vaccines (bacterins) are routinely used in livestock and domestic animals, however, protection is serovar-restricted and short-term only...
January 14, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28092222/varied-presentations-of-leptospirosis-experience-from-a-tertiary-care-hospital-in-north-india
#2
Rama Chaudhry, Karnika Saigal, Tej Bahadur, Kamla Kant, Bishwanath Chourasia, Nitin Gupta
Leptospirosis has been recognised as an emerging global public health problem. The aim of our study was to explore the epidemiological and clinical pattern of disease occurrence in suspected cases and to search for any existing co-infections. Ours was a retrospective study in patients with acute febrile illness in north India over a period of three years (April 2011 to June 2014). Serological diagnosis of leptospirosis was made using the PanBio IgM ELISA kit. Using modified Faine's criteria, presumptive and possible diagnosis was made in 57% and 34% cases, respectively...
January 1, 2017: Tropical Doctor
https://www.readbyqxmd.com/read/28088326/acute-kidney-injury-due-to-tropical-infectious-diseases-and-animal-venoms-a-tale-of-2-continents
#3
REVIEW
Emmanuel A Burdmann, Vivekanand Jha
South and Southeast Asia and Latin American together comprise 46 countries and are home to approximately 40% of the world population. The sociopolitical and economic heterogeneity, tropical climate, and malady transitions characteristic of the region strongly influence disease behavior and health care delivery. Acute kidney injury epidemiology mirrors these inequalities. In addition to hospital-acquired acute kidney injury in tertiary care centers, these countries face a large preventable burden of community-acquired acute kidney injury secondary to tropical infectious diseases or animal venoms, affecting previously healthy young individuals...
January 11, 2017: Kidney International
https://www.readbyqxmd.com/read/28080908/antidog-igg-secondary-antibody-successfully-detects-igg-in-a-variety-of-aquatic-mammals
#4
Katherine Roehl, Mark Jankowski, Erik Hofmeister
Serological tests play an important role in the detection of wildlife diseases. However, while there are many commercial assays and reagents available for domestic species, there is a need to develop efficient serological assays for wildlife. In recent years, marine mammals have represented a wildlife group with emerging infectious diseases, such as influenza, brucellosis, and leptospirosis. However, with the exception of disease-agent-specific assays or functional assays, few reports describe the use of antibody detection assays in marine mammals...
December 2016: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28077740/the-jarisch-herxheimer-reaction-after-antibiotic-treatment-of-spirochetal-infections-a-review-of-recent-cases-and-our-understanding-of-pathogenesis
#5
REVIEW
Thomas Butler
Within 24 hours after antibiotic treatment of the spirochetal infections syphilis, Lyme disease, leptospirosis, and relapsing fever (RF), patients experience shaking chills, a rise in temperature, and intensification of skin rashes known as the Jarisch-Herxheimer reaction (JHR) with symptoms resolving a few hours later. Case reports indicate that the JHR can also include uterine contractions in pregnancy, worsening liver and renal function, acute respiratory distress syndrome, myocardial injury, hypotension, meningitis, alterations in consciousness, seizures, and strokes...
January 11, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28069071/sporadic-cases-of-adult-measles-a-research-article
#6
Ranjan Premaratna, Nathasha Luke, Harsha Perera, Mahesh Gunathilake, Pubudu Amarasena, T G A Nilmini Chandrasena
BACKGROUND: Measles caused by a paramyxovirus, characterized by fever, malaise, cough, coryza conjunctivitis, a maculopapular rash is known to result in pneumonia, encephalitis and death. Fatal cases of measles in Sri Lanka are rare after implementation of the National Immunization Programme in 1984. Thereafter 0.1% case fatality rate was observed during October 1999-June 2000 which is a very low figure compared to other regional countries. Immunization guidelines were further revised in 2001, 2011 and in 2012 when additional immunization was recommended to age group 4-21 years; who are likely to have inadequate immunization, in order to achieve elimination of Measles by 2020...
January 10, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28063871/new-trends-in-human-and-animal-leptospirosis-in-croatia-2009-2014
#7
Josipa Habus, Zdenka Persic, Silvio Spicic, Silvijo Vince, Zrinka Stritof, Zoran Milas, Zeljko Cvetnic, Matko Perharic, Nenad Turk
Leptospirosis is a geographically widespread and globally underestimated zoonosis that affects humans and variety of animals. To identify trends and possible risk factors, joined medical and veterinary teams investigated epidemiology and epizootiology of leptospirosis in Croatia. Retrospective analysis of data obtained from referent diagnostic laboratories included a total of 1917 human and 123964 animal sera tested in the period from 2009 to 2014. We found high human leptospirosis average incidence rate of 1...
January 4, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28056834/comparing-antibiotic-treatment-for-leptospirosis-using-network-meta-analysis-a-tutorial
#8
Cho Naing, Simon A Reid, Kyan Aung
BACKGROUND: Network meta-analysis consists of simultaneous analysis of both direct comparisons of interventions within randomized controlled trials and indirect comparisons across trials based on a common comparator. In this paper, we aimed to characterise the conceptual understanding and the rationale for the use of network meta-analysis in assessing drug efficacy. METHODS: We selected randomized controlled trials, assessing efficacy of antibiotics for the treatment of leptospirosis as a case study...
January 5, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28051192/global-warming-and-its-health-impact
#9
Antonella Rossati
Since the mid-19th century, human activities have increased greenhouse gases such as carbon dioxide, methane, and nitrous oxide in the Earth's atmosphere that resulted in increased average temperature. The effects of rising temperature include soil degradation, loss of productivity of agricultural land, desertification, loss of biodiversity, degradation of ecosystems, reduced fresh-water resources, acidification of the oceans, and the disruption and depletion of stratospheric ozone. All these have an impact on human health, causing non-communicable diseases such as injuries during natural disasters, malnutrition during famine, and increased mortality during heat waves due to complications in chronically ill patients...
January 2017: International Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28027297/efficacy-of-the-rabbit-polyclonal-anti-leptospira-antibody-against-homotype-or-heterotype-leptospira-infection-in-hamster
#10
Xuemin Jin, Wenlong Zhang, Zhuang Ding, Hai Wang, Dianjun Wu, Xufeng Xie, Tao Lin, Yunhe Fu, Naisheng Zhang, Yongguo Cao
Leptospirosis, caused by Leptospira, is one of the most important of neglected emerging zoonotic diseases that has important impacts on public health worldwide. Polyclonal antibody (pcAb) therapy is a potential method to process a series of pathogens for which there are limited determination of treatment, such as leptospirosis. First, we evaluated the efficacy of pcAb, derived from the sera of rabbits inoculated with Leptospira, against homotype (Leptospira interrogans serovar Lai) or heterotype (Leptospira interrogans serovar Autumnalis) Leptospira infection in a lethal hamster model...
December 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28008823/saccharomyces-boulardii-improves-humoral-immune-response-to-dna-vaccines-against-leptospirosis
#11
Marcelle Moura Silveira, Fabricio Conceição, Marcelo Mendonça, Carlos Eduardo Da Cunha, Gustavo Moreira, Neida Conrad, Patrícia Oliveira, Daiane Hartwig, Priscila De Leon, Ângela Moreira
Saccharomyces boulardii may improve the immune response by enhancing the production of anti-inflammatory cytokines, T cell proliferation and dendritic cell activation. The immunomodulator effect of this probiotic has never been tested with DNA vaccines, which frequently induce low antibody titers. This study evaluated Saccharomyces boulardii capacity to improve the humoral and cellular immune responses using DNA vaccines coding for the leptospiral protein fragments LigAni and LigBrep. BALB/c mice were fed with rodent-specific feed containing 108 colony-forming units of Saccharomyces boulardii per gram...
December 22, 2016: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/27996041/leptospira-surface-adhesin-lsa21-induces-toll-like-receptor-2-and-4-mediated-inflammatory-responses-in-macrophages
#12
Syed M Faisal, Vivek P Varma, M Subathra, Sarwar Azam, Anil K Sunkara, Mohd Akif, Mirza S Baig, Yung-Fu Chang
Leptospirosis is zoonotic and emerging infectious disease of global importance. Little is understood about Leptospira pathogenesis and host immune response. In the present work we have investigated how Leptospira modulates the host innate immune response mediated by Toll-like receptors (TLRs) via surface exposed proteins. We screened Leptospira outer membrane/surface proteins for their ability to activate/inhibit TLR2/4 signaling in HEK293 cell lines. Of these the 21 kDa Leptospira surface adhesin, Lsa21 had strong TLR2 and TLR4 activity leading to production of proinflammatory cytokines and expression of costimulatory molecules in mouse macrophages...
December 20, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27983472/characterization-of-two-new-putative-adhesins-of-leptospira-interrogans
#13
Jupciana Figueredo, Gabriela Siqueira, Gisele Souza, Marcos Heinemann, Silvio Vasconcellos, Erica Chapola, Ana Lucia T O Nascimento
We here report the characterization of two novel proteins encoded by the genes LIC11122 and LIC12287, identified in the genome sequences of Leptospira interrogans, annotated, respectively, as a putative sigma factor and hypothetical. . The coding sequences (CDSs) LIC11122 and LIC12287 have signal peptide SPII and SPI and are predicted to be located mainly at the cytoplasm membrane of the bacteria. The genes were cloned and the proteins expressed using Escherichia coli. Proteinase K digestion showed that both proteins are surface exposed...
December 15, 2016: Microbiology
https://www.readbyqxmd.com/read/27982303/genetic-diversity-of-leptospira-in-northwestern-colombia-first-report-of-leptospira-santarosai-as-a-recognised-leptospirosis-agent
#14
Ronald Guillermo Peláez Sanchez, Juan Álvaro Lopez, Martha María Pereira, Margarita Arboleda Naranjo, Piedad Agudelo-Flórez
The region of Antioquia in northeastern Colombia has the highest number of reported leptospirosis cases in the country. It also shows high seroprevalence indexes in the general population and socio-environmental conditions favourable for the transmission of the disease between humans and animals. In this study, 25 Leptospira isolates from Colombia's Antioquia department were identified to the species level as L. santarosai (12), L. interrogans (9) and L. meyeri (4) using phylogenetic analysis of the Amidohydrolase gene...
December 2016: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/27976565/different-clinical-spectrum-of-leptospirosis
#15
Fatma Deniz Aygün, Pınar Özge Avar-Aydın, Haluk Çokuğraş, Yıldız Camcıoğlu
Leptospirosis is a prevalent zoonotic disease. Human infection usually occurs through exposure to environmental sources. Clinical course of leptospirosis is variable. We presented five patients, aged between 4-14 years, having a history of contact with rodents and symptoms 7-10 days after contact. The first three cases were relatives and had contact with dead rats after applying insecticides to bakery across from their house. The first case diagnosed as isolated meningitis, others as flu-like illness. The fourth case had a contact history with a rat inundate in the canalization and diagnosed as acute hepatitis...
2016: Turkish Journal of Pediatrics
https://www.readbyqxmd.com/read/27966835/the-epidemiology-and-characteristics-of-q-fever-and-co-infections-with-scrub-typhus-murine-typhus-or-leptospirosis-in-taiwan-a-nationwide-database-study
#16
C-H Lai, W Sun, C-H Lee, J-N Lin, M-H Liao, S-S Liu, T-Y Chang, K-F Tsai, Y-C Chang, H-H Lin, Y-H Chen
Q fever (QF) is a worldwide zoonosis associated with outbreaks. Only a few nationwide studies regarding the surveillance and epidemiology of human QF have been reported. Although QF is endemic in Taiwan, a nationwide database investigation of the epidemiology and characteristics of QF and its associations with scrub typhus (ST), murine typhus (MT) and leptospirosis (LS) has never been reported. We analysed nationwide databases of suspected QF, ST, MT and LS cases from October 2007 to December 2014 obtained from the Centers for Disease Control, Taiwan...
December 14, 2016: Zoonoses and Public Health
https://www.readbyqxmd.com/read/27955629/cerebellar-ataxia-due-to-leptospirosis-a-case-report
#17
Rajveer Singh, Dheeraj Khurana, Sahil Mehta, Aditya Choudhary, Gayathri Petluri, Vivek Lal
BACKGROUND: Leptospirosis involves nervous system in around 10-15% of the cases, the commonest presentation being aseptic meningitis. Most of the clinical features of neuroleptospirosis are due to capillary endothelial damage and vasculitis. Ataxia is an extremely uncommon manifestation of Leptospirosis occuring in <5% of cases. CASE PRESENTATION: A 28 year old female from North India presented with a short febrile illness followed by an acute onset cerebellar ataxia, anemia, thrombocytopenia and transaminitis...
December 12, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27942194/acute-undifferentiated-febrile-illness-in-patients-presenting-to-a-tertiary-care-hospital-in-south-india-clinical-spectrum-and-outcome
#18
Kundavaram Paul Prabhakar Abhilash, Jonathan Arul Jeevan, Shubhanker Mitra, Nirvin Paul, Thimiri Palani Murugan, Ajay Rangaraj, Sandeep David, Samuel George Hansdak, John Antony Jude Prakash, Asha Mary Abraham, Prakash Ramasami, Sowmya Sathyendra, Thambu David Sudarsanam, George M Varghese
BACKGROUND: Acute undifferentiated febrile illness (AUFI) may have similar clinical presentation, and the etiology is varied and region specific. MATERIALS AND METHODS: This prospective observational study was conducted in a tertiary hospital in South India. All adult patients presenting with AUFI of 3-14 days duration were evaluated for etiology, and the differences in presentation and outcome were analyzed. RESULTS: The study cohort included 1258 patients...
October 2016: Journal of Global Infectious Diseases
https://www.readbyqxmd.com/read/27929279/pet-related-infections
#19
Michael J Day
Physicians and veterinarians have many opportunities to partner in promoting the well-being of people and their pets, especially by addressing zoonotic diseases that may be transmitted between a pet and a human family member. Common cutaneous pet-acquired zoonoses are dermatophytosis (ringworm) and sarcoptic mange (scabies), which are both readily treated. Toxoplasmosis can be acquired from exposure to cat feces, but appropriate hygienic measures can minimize the risk to pregnant women. Persons who work with animals are at increased risk of acquiring bartonellosis (e...
November 15, 2016: American Family Physician
https://www.readbyqxmd.com/read/27928094/seroconversion-to-causes-of-febrile-illness-in-mongolian-peacekeepers-deployed-to-south-sudan
#20
Altangerel Enkhtsetseg, Rendoo Davadoorj, Stefan Fernandez, Duangrat Mongkolsirichaikul, Damdin Altantuul, Erdene Elbegdorj, Lkhagvasuren Ganchimeg, Samuel L Yingst
Immediately before deployment (Fall 2012) and after deployment (Spring 2013) in support of United Nations peacekeeping operations, Mongolian Armed Forces medical personnel obtained serum samples from the first contingent of Mongolian peacekeepers deploying to South Sudan to monitor serologic evidence of exposure to diseases that cause acute febrile illness. A total of 632 paired samples were tested for IgG antibody for the following (number of seroconversions in parentheses): Rickettsia (spotted fever and typhus groups) (25), West Nile fever virus (WNV) (23), Coxiella burnetii (causative agent of Q fever) (12), dengue virus (8), leptospirosis (6), chikungunya virus (0), Congo-Crimean hemorrhagic fever virus (0), Japanese encephalitis virus (0), and Rift Valley fever virus (0)...
December 7, 2016: American Journal of Tropical Medicine and Hygiene
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