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leptospirosis

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https://www.readbyqxmd.com/read/28221126/imported-leptospira-licerasiae-infection-in-traveler-returning-to-japan-from-brazil
#1
Motoyuki Tsuboi, Nobuo Koizumi, Kayoko Hayakawa, Shuzo Kanagawa, Norio Ohmagari, Yasuyuki Kato
We describe a case of intermediate leptospirosis resulting from Leptospira licerasiae infection in a traveler returning to Japan from Brazil. Intermediate leptospirosis should be included in the differential diagnosis for travelers with fever returning from South America. This case highlights the need for strategies that detect pathogenic and intermediate Leptospira species.
March 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28220151/prioritizing-zoonotic-diseases-in-ethiopia-using-a-one-health-approach
#2
Emily G Pieracci, Aron J Hall, Radhika Gharpure, Abraham Haile, Elias Walelign, Asefa Deressa, Getahun Bahiru, Meron Kibebe, Henry Walke, Ermias Belay
BACKGROUND: Ethiopia has the second largest human population in Africa and the largest livestock population on the continent. About 80% of Ethiopians are dependent on agriculture and have direct contact with livestock or other domestic animals. As a result, the country is vulnerable to the spread of zoonotic diseases. As the first step of the country's engagement in the Global Health Security Agenda, a zoonotic disease prioritization workshop was held to identify significant zoonotic diseases of mutual concern for animal and human health agencies...
December 2016: One Health
https://www.readbyqxmd.com/read/28215193/the-impact-of-livestock-manure-control-policy-on-human-leptospirosis-in-republic-of-korea-using-interrupted-time-series-analysis
#3
S Ryu, C L Lau, B C Chun
Leptospirosis is a zoonotic disease that the pathogen can be transmitted to humans through the excretions of infected animals. In the Republic of Korea, the Livestock Manure Control Act was enforced in September 2007 to improve underground water hygiene. The objective of this study was to evaluate the impact of Livestock Manure Control Policy on the incidence and the trend of human leptospirosis. An interrupted time series analysis using the monthly incidence of leptospirosis was conducted based on data derived from the Korean National Surveillance System between January 1999 and January 2015...
February 20, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28210912/inhibitory-effects-of-emodin-thymol-and-astragalin-on-leptospira-interrogans-induced-inflammatory-response-in-the-uterine-and-endometrium-epithelial-cells-of-mice
#4
Wenlong Zhang, Xiaojie Lu, Wei Wang, Zhuang Ding, Yunhe Fu, Xiaofei Zhou, Naisheng Zhang, Yongguo Cao
Leptospirosis is a systemic infection that causes, among others, acute kidney injury, acute liver disease, muscle pain, vasculitis, bleeding disorders, and reproductive loss. In an effort to reduce uterine inflammatory responses induced by Leptospira, we evaluated the anti-inflammation effects of emodin, thymol, and astragalin in a mouse model. Our results showed that treatment with emodin, thymol, and astragalin alleviated uterine inflammation induced by leptospira infection via suppression of pro-inflammatory cytokine expression and prevented tissue damage...
February 16, 2017: Inflammation
https://www.readbyqxmd.com/read/28210253/genomic-analysis-of-a-new-serovar-of-leptospira-weilii-serogroup-manhao
#5
Yinghua Xu, Huajun Zheng, Ying Zhang, Yuezhu Wang, Jinlong Zhang, Zhe Li, Shenghui Cui, Xiaofang Xin, Qiang Ye, Yung-Fu Chang, Junzhi Wang
Leptospirosis, caused by pathogenic Leptospira spp., is recognized as an important emerging zoonotic disease throughout the world. In this study, multiple approaches were used to characterize the recently discovered serovar Heyan strain L231. This strain can infect guinea pigs and belonged to the pathogenic species L. weilii. Genome sequencing analysis revealed the draft genome of 4.2 M bp with a G+C content of 40.67% for strain L231, and a total of 4,794 ORFs were identified. The strain L231 genome was found to have a larger LPS biosynthesis locus than that of strains L...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28209095/leptospira-seropositivity-as-a-risk-factor-for-mesoamerican-nephropathy
#6
Alejandro Riefkohl, Oriana Ramírez-Rubio, Rebecca L Laws, Michael D McClean, Daniel E Weiner, James S Kaufman, Renee L Galloway, Sean V Shadomy, Marta Guerra, Juan José Amador, José Marcel Sánchez, Damaris López-Pilarte, Chirag R Parikh, Jessica H Leibler, Daniel R Brooks
BACKGROUND: Leptospirosis is postulated as a possible cause of Mesoamerican Nephropathy (MeN) in Central American workers. OBJECTIVES: Investigate job-specific Leptospira seroprevalence and its association with kidney disease biomarkers. METHODS: In 282 sugarcane workers, 47 sugarcane applicants and 160 workers in other industries, we measured anti-leptospiral antibodies, serum creatinine, and urinary injury biomarkers, including neutrophil gelatinase-associated lipocalin (NGAL), interleukin-18 (IL-18), and N-acetyl-D-glucosaminidase (NAG)...
February 17, 2017: International Journal of Occupational and Environmental Health
https://www.readbyqxmd.com/read/28208854/polymerase-chain-reaction-an-important-tool-for-early-diagnosis-of-leptospirosis-cases
#7
Summaiya Mullan, Tanvi Harivadanbhai Panwala
INTRODUCTION: Various diagnostic methods like Microscopic Agglutination Test (MAT), IgM ELISA, Isolation of Leptospira from the clinical specimen, Rapid leptocheck tests etc., are available for diagnosis of leptospirosis. Polymerase Chain Reaction (PCR) is used for diagnosis of various diseases of infectious origin including leptospirosis but there is paucity of data about comparison of PCR with other available method of diagnosis of leptospirosis. AIM: The aim of the study was to detect the leptospiral DNA by PCR method and to compare the results of PCR with other available diagnostic methods used for diagnosis of suspected leptospirosis cases in acute phase of illness...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28207932/detecting-signals-of-chronic-shedding-to-explain-pathogen-persistence-leptospira-interrogans-in-california-sea-lions
#8
M G Buhnerkempe, K C Prager, C C Strelioff, D J Greig, J L Laake, S R Melin, R L DeLong, F M D Gulland, J O Lloyd-Smith
Identifying mechanisms driving pathogen persistence is a vital component of wildlife disease ecology and control. Asymptomatic, chronically infected individuals are an oft-cited potential reservoir of infection but demonstrations of the importance of chronic shedding to pathogen persistence at the population level remain scarce. Studying chronic shedding using commonly collected disease data is hampered by numerous challenges, including short-term surveillance that focuses on single epidemics and acutely ill individuals, the subtle dynamical influence of chronic shedding relative to more obvious epidemic drivers, and poor ability to differentiate between the effects of population prevalence of chronic shedding versus intensity and duration of chronic shedding in individuals...
February 16, 2017: Journal of Animal Ecology
https://www.readbyqxmd.com/read/28198346/characterization-of-two-new-putative-adhesins-of-leptospira-interrogans
#9
Jupciana M Figueredo, Gabriela H Siqueira, Gisele O de Souza, Marcos B Heinemann, Silvio A Vasconcellos, Erica G B Chapola, Ana L 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 a hypothetical protein. The CDSs LIC11122 and LIC12287 have signal peptide SPII and SPI and are predicted to be located mainly at the cytoplasmic 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...
January 2017: Microbiology
https://www.readbyqxmd.com/read/28185603/outbreak-investigation-of-fever-mimicking-dengue-in-havelock-island-an-important-tourist-destination-in-the-andaman-nicobar-archipelago-2014
#10
C Kartick, G S J Bharathi, P Surya, M Anwesh, S Arun, N Muruganandam, R Avijit, P Vijayachari
An upsurge of fever cases of unknown origin, but resembling dengue and leptospirosis was reported in Havelock, Andaman & Nicobar Islands, an important tourism spot, during May 2014. Investigations were carried out to determine the aetiology, and to describe the epidemiology of the outbreak. The data on fever cases attending Primary Health Centre (PHC), Havelock showed that the average number of cases reporting per week over the last 2 years was 46·1 (95% confidence interval 19·4-72·9). A total of 27 (43·5%) patients out of the 62 suspected cases were diagnosed as having DENV infection based on a positive enzyme immunoassay or reverse transcriptase-polymerase chain reaction...
February 10, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28182662/investigation-on-predominant-leptospira-serovars-and-its-distribution-in-humans-and-livestock-in-thailand-2010-2015
#11
Sudarat Chadsuthi, Dominique J Bicout, Anuwat Wiratsudakul, Duangjai Suwancharoen, Wimol Petkanchanapong, Charin Modchang, Wannapong Triampo, Parntep Ratanakorn, Karine Chalvet-Monfray
BACKGROUND: Leptospirosis is a worldwide zoonotic bacterial disease caused by infection with leptospires. Leptospirosis in humans and livestock is an endemic and epidemic disease in Thailand. Livestock may act as reservoirs for leptospires and source for human infection. METHODOLOGY/PRINCIPAL FINDINGS: Data on leptospirosis infection in humans and livestock (Buffaloes, Cattle, and Pigs) species during 2010 to 2015 were analyzed. Serum samples were examined using Microscopic Agglutination Test (MAT) to identify antibodies against Leptospira serovars using a cut-off titer ≥ 1:100...
February 9, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28162961/undifferentiated-tropical-febrile-illness-in-cordoba-colombia-not-everything-is-dengue
#12
Salim Mattar, Vaneza Tique, Jorge Miranda, Eney Montes, Denisses Garzon
In Colombia, undifferentiated tropical febrile illness (UTFI) are frequent and of considerable concern. They also share many clinical features. Between 2012 and 2013 in an endemic tropical area of Cordoba, Colombia, we conducted a prospective study to establish an etiological diagnosis of UTFI. Using diagnostic tests for dengue, leptospirosis, hantavirus, malaria, rickettsia, brucellosis, hepatitis A and B on 100 patients recruited for the study. We identified 69 patients with presumed UTFI: leptospirosis (n=27), dengue (n=26), hantavirus infection (n=4), malaria (n=4), rickettsial infection (n=2), hepatitis A (n=1), and brucellosis (n=1); no hepatitis B cases were detected...
February 2, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28162129/assessment-of-community-awareness-and-risk-perceptions-of-zoonotic-causes-of-abortion-in-cattle-at-three-selected-livestock-wildlife-interface-areas-of-zimbabwe
#13
M Ndengu, M DE Garine-Wichatitsky, D M Pfukenyi, M Tivapasi, B Mukamuri, G Matope
A study was conducted to assess the awareness of cattle abortions due to brucellosis, Rift Valley fever (RVF) and leptospirosis, and to compare frequencies of reported abortions in communities living at the periphery of the Great Limpopo Transfrontier Conservation Area in southeastern Zimbabwe. Three study sites were selected based on the type of livestock-wildlife interface: porous livestock-wildlife interface (unrestricted); non-porous livestock-wildlife interface (restricted by fencing); and livestock-wildlife non-interface (totally absent or control)...
February 6, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28161462/immune-response-and-protective-profile-elicited-by-a-multi-epitope-chimeric-protein-derived-from-leptospira-interrogans
#14
Luis G V Fernandes, Aline F Teixeira, Antonio F S Filho, Gisele O Souza, Silvio A Vasconcellos, Marcos B Heinemann, Eliete C Romero, Ana L T O Nascimento
INTRODUCTION: Pathogenic Leptospira is the causative agent of leptospirosis, a widely disseminated disease of human and veterinary concern. The development of vaccines that elicit cross-protective immunity through multiple leptospiral serovars has long been pursued. The aim of this study was to develop a novel chimeric multi-epitope fusion antigen, containing sequences of previously studied outer membrane proteins (OMPs) of Leptospira. METHODS: The chimeric protein was designed based on the amino acid sequences of the LigA, Mce, Lsa45, OmpL1, and LipL41 proteins, cloned into pAE vector, the protein expressed in Escherichia coli, and its immune response evaluated in the hamster infection model...
February 1, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28144059/epidemiological-profile-of-acute-respiratory-distress-syndrome-patients-a-tertiary-care-experience
#15
Rahul Magazine, Shobitha Rao, Bharti Chogtu, Ramkumar Venkateswaran, Hameed Aboobackar Shahul, Umesh Goneppanavar
BACKGROUND: Acute respiratory distress syndrome (ARDS) is seen in critically ill patients. Its etiological spectrum in India is expected to be different from that seen in western countries due to the high prevalence of tropical infections. AIM: To study the epidemiological profile of ARDS patients. SETTING: A tertiary care hospital in Karnataka, India. MATERIALS AND METHODS: Retrospective analysis of 150 out of the 169 ARDS patients diagnosed during 2010-2012...
January 2017: Lung India: Official Organ of Indian Chest Society
https://www.readbyqxmd.com/read/28141801/distinct-antibody-responses-of-patients-with-mild-and-severe-leptospirosis-determined-by-whole-proteome-microarray-analysis
#16
Carolina Lessa-Aquino, Janet C Lindow, Arlo Randall, Elsio Wunder, Jozelyn Pablo, Rie Nakajima, Algis Jasinskas, Jaqueline S Cruz, Alcineia O Damião, Nívison Nery, Guilherme S Ribeiro, Federico Costa, José E Hagan, Mitermayer Galvão Reis, Albert I Ko, Marco Alberto Medeiros, Philip L Felgner
BACKGROUND: Leptospirosis is an important zoonotic disease worldwide. Humans usually present a mild non-specific febrile illness, but a proportion of them develop more severe outcomes, such as multi-organ failure, lung hemorrhage and death. Such complications are thought to depend on several factors, including the host immunity. Protective immunity is associated with humoral immune response, but little is known about the immune response mounted during naturally-acquired Leptospira infection...
January 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28138052/estimating-burdens-of-neglected-tropical-zoonotic-diseases-on-islands-with-introduced-mammals
#17
Luz A de Wit, Donald A Croll, Bernie Tershy, Kelly M Newton, Dena Spatz, Nick D Holmes, A Marm Kilpatrick
Many neglected tropical zoonotic diseases are maintained by introduced mammals, and on islands the most common introduced species are rodents, cats, and dogs. Management of introduced mammals, including control or eradication of feral populations, which is frequently done for ecological restoration, could also reduce or eliminate the diseases these animals carry. Understanding the burden of these zoonotic diseases is crucial for quantifying the potential public health benefits of introduced mammal management...
January 30, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28133734/diagnostic-value-of-two-commercial-chromatographic-patient-side-tests-in-the-diagnosis-of-acute-canine-leptospirosis
#18
C I Gloor, A Schweighauser, T Francey, S Rodriguez-Campos, B Vidondo, B Bigler, S Schuller
OBJECTIVES: To determine the diagnostic performance of two patient-side tests (RDT-1: Test-it™ and RDT-2 Witness®Lepto) in the early diagnosis of canine leptospirosis. METHODS: Retrospective study of 108 dogs with leptospirosis and 53 controls. Leptospirosis was diagnosed based on compatible clinical and clinicopathologic signs and either a single microscopic agglutination test titre_ >800 (n=49), seroconversion (n=53), positive urine real time PCR (RT-PCR) (n=1), evidence of spirochaetes in silver-stained tissues (n=1) or a combination of these (n=4)...
January 30, 2017: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/28131372/diagnostic-accuracy-of-an-in-house-elisa-using-the-intermediate-species-leptospira-fainei-as-antigen-for-diagnosis-of-acute-leptospirosis-in-dogs
#19
Bruno Penna, Carla D Marassi, Hugo Libonati, Lorena Narduche, Walter Lilenbaum, Pascale Bourhy
Diagnosis of animal leptospirosis is still challenging. The microscopic agglutination test, is the current method for diagnosing leptospirosis. However, this technique requires specific equipment, highly trained staff and the maintenance of live cultures of several reference strains of Leptospira for use as antigens. Recently, an ELISA (enzyme-linked immunosorbent assay) employing a Leptospira fainei serovar Hurstbridge based antigen for the early diagnostic of human leptospirosis was developed. In this study we estimate the diagnostic sensitivity and specificity of this test in identifying acute canine leptospirosis...
February 2017: Comparative Immunology, Microbiology and Infectious Diseases
https://www.readbyqxmd.com/read/28129788/meta-analysis-to-estimate-the-load-of-leptospira-excreted-in-urine-beyond-rats-as-important-sources-of-transmission-in-low-income-rural-communities
#20
REVIEW
Veronica Barragan, Nathan Nieto, Paul Keim, Talima Pearson
BACKGROUND: Leptospirosis is a major zoonotic disease with widespread distribution and a large impact on human health. Carrier animals excrete pathogenic Leptospira primarily in their urine. Infection occurs when the pathogen enters a host through mucosa or small skin abrasions. Humans and other animals are exposed to the pathogen by direct contact with urine, contaminated soil or water. While many factors influence environmental cycling and the transmission of Leptospira to humans, the load of pathogenic Leptospira in the environment is likely to play a major role...
January 28, 2017: BMC Research Notes
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