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leptospirosis

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https://www.readbyqxmd.com/read/28934773/leptospirosis-in-three-workers-on-a-dairy-farm-with-unvaccinated-cattle
#1
Jackie Benschop, Julie Collins-Emerson, Allie Maskill, Patrick O'Connor, Margaret Tunbridge, Yuni Yupiana, Jenny Weston
AIM: We report a one-health investigation of three cases of leptospirosis on a dairy farm with unvaccinated cattle in New Zealand. The cases are discussed in the context of diagnostics, risk factors, persistence of symptoms and outbreak mitigation measures. METHOD: Clinical and laboratory records from the human cases were reviewed and serological and molecular investigations were conducted into the Leptospira status of cattle and pigs on the farm. RESULTS: Cases presented early in their illness and all three were confirmed within seven days of onset of symptoms by urine PCR and within 18 days by convalescent MAT (two Hardjo-bovis, one Pomona)...
September 22, 2017: New Zealand Medical Journal
https://www.readbyqxmd.com/read/28934202/platelet-dysfunction-contributes-to-bleeding-complications-in-patients-with-probable-leptospirosis
#2
Rahajeng N Tunjungputri, Muhammad Hussein Gasem, Willemijn van der Does, Pandu H Sasongko, Bambang Isbandrio, Rolf T Urbanus, Philip G de Groot, Andre van der Ven, Quirijn de Mast
BACKGROUND: Severe leptospirosis is frequently complicated by a hemorrhagic diathesis, of which the pathogenesis is still largely unknown. Thrombocytopenia is common, but often not to the degree that spontaneous bleeding is expected. We hypothesized that the hemorrhagic complications are not only related to thrombocytopenia, but also to platelet dysfunction, and that increased binding of von Willebrand factor (VWF) to platelets is involved in both platelet dysfunction and increased platelet clearance...
September 21, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28926845/leptospirosis-renal-disease-emerging-culprit-of-chronic-kidney-disease-unknown-etiology
#3
Chih-Wei Yang
Leptospirosis is the most prevalent zoonosis affecting more than 1 million populations worldwide. Interestingly, leptospirosis endemic regions coincide with chronic kidney disease (CKD) hotspots largely due to flooding and agricultural overlaps. Acute leptospirosis induces multiple organ dysfunction including acute kidney injury and may predispose to CKD and end-stage renal disease, if not treated timely. Asymptomatic infection may carry the bacteria in the kidney and CKD progresses insidiously. Histologic finding of leptospirosis renal disease includes tubulointerstitial nephritis, interstitial fibrosis, and tubular atrophy...
September 20, 2017: Nephron
https://www.readbyqxmd.com/read/28923024/sero-epidemiology-study-of-leptospirosis-in-febrile-patients-from-terai-region-of-nepal
#4
Lalmani Regmi, Kishor Pandey, Meena Malla, Santosh Khanal, Basu Dev Pandey
BACKGROUND: Leptospirosis is a re-emerging zoonotic disease caused by pathogenic strains of bacteria belonging to genus Leptospira whose symptoms can range from mild clinical manifestations to a severe life threatening illness. This disease may be under-recognized in resource poor settings like Nepal where many clinical laboratories lack appropriate equipment, technology and personnel for proper diagnosis. METHODS: We used IgM ELISA to estimate the sero-prevalence of leptospirosis in a group of febrile patients in a western region of Nepal...
September 18, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28915243/rapid-actionable-diagnosis-of-urban-epidemic-leptospirosis-using-a-pathogenic-leptospira-lipl32-based-real-time-pcr-assay
#5
Irina N Riediger, Robyn A Stoddard, Guilherme S Ribeiro, Sueli M Nakatani, Suzana D R Moreira, Irene Skraba, Alexander W Biondo, Mitermayer G Reis, Alex R Hoffmaster, Joseph M Vinetz, Albert I Ko, Elsio A Wunder
BACKGROUND: With a conservatively estimated 1 million cases of leptospirosis worldwide and a 5-10% fatality rate, the rapid diagnosis of leptospirosis leading to effective clinical and public health decision making is of high importance, and yet remains a challenge. METHODOLOGY: Based on parallel, population-based studies in two leptospirosis-endemic regions in Brazil, a real-time PCR assay which detects lipL32, a gene specifically present in pathogenic Leptospira, was assessed for the diagnostic effectiveness and accuracy...
September 15, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28912108/leptospira-borgpetersenii-hybrid-leucine-rich-repeat-protein-cloning-and-expression-immunogenic-identification-and-molecular-docking-evaluation
#6
Tepyuda Sritrakul, Supachai Nitipan, Worawidh Wajjwalku, Anchalee La-Ard, Chattip Suphatpahirapol, Wimol Petkarnjanapong, Boonsong Ongphiphadhanakul, Siriwan Prapong
Leptospirosis is an important zoonotic disease, and the major outbreak of this disease in Thailand in 1999 was due largely to the Leptospira borgpetersenii serovar Sejroe. Identification of the leucine-rich repeat (LRR) LBJ_2271 protein containing immunogenic epitopes and the discovery of the LBJ_2271 ortholog in Leptospira serovar Sejroe, KU_Sej_R21_2271, led to further studies of the antigenic immune properties of KU_Sej_LRR_2271. The recombinant hybrid (rh) protein was created and expressed from a hybrid PCR fragment of KU_Sej_R21_2271 fused with DNA encoding the LBJ_2271 signal sequence for targeting protein as a membrane-anchoring protein...
September 12, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28893674/seroepidemiology-of-leptospirosis-among-febrile-patients-in-a-rapidly-growing-suburban-slum-and-a-flood-vulnerable-rural-district-in-mozambique-2012-2014-implication-for-the-management-of-fever
#7
Policarpo Ribeiro, Nilesh Bhatt, Sádia Ali, Vanessa Monteiro, Edmilson da Silva, Ilana Teruszkin Balassiano, Carolina Aquino, Nilsa de de Deus, Onelia Guiliche, Argentina Felisbela Muianga, Pascoal Jorge Alho, Virginia Lara Evaristo, Ivan Manhiça, Marco Medeiros, Eduardo Samo Gudo
OBJECTIVE: Leptospirosis, is one of most widespread zoonosis in the world and is caused by spirochetes of the genus Leptospira. In Mozambique, the disease is heavily ignored and its epidemiology is unknown. The objective of this study was to investigate occurrence of leptospirosis in febrile patients. METHODS: A cross-sectional study was conducted among febrile patients between June 2012 and September 2015. A total of 373 paired samples were drawn from febrile patients, of whom 208 were from Caia District Hospital (rural setting) in Sofala province and 165 were from Polana Caniço General Hospital (suburban setting) in Maputo city...
September 8, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28890513/leptospirosis-cases-in-the-tokyo-metropolitan-area-japan
#8
Yoshikazu Mutoh, Nobuo Koizumi, Eriko Morino, Kayoko Hayakawa, Yasuyuki Kato, Norio Ohmagari
In Japan, 20-50 cases of leptospirosis are reported annually, typically involving farmers or returnees from tropical areas. Here, we report five indigenous leptospirosis cases that occurred in the Tokyo urban area. All cases were male (mean age 65.8 ± 4.7 years) and presented with clinical features including high fever, acute kidney injury, and jaundice. Three cases presented with pulmonary infiltration and ground glass opacity on admission. Two of the five patients were intubated and underwent continuous hemodiafiltration...
September 11, 2017: Japanese Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28882437/dna-vaccines-against-leptospirosis-a-literature-review
#9
REVIEW
Marcelle Moura Silveira, Thaís Larré Oliveira, Rodrigo Andrade Schuch, Alan John Alexander McBride, Odir Antônio Dellagostin, Daiane Drawanz Hartwig
Leptospirosis is an infectious disease caused by pathogenic Leptospira species. The vaccines that are currently available for leptospirosis are composed of whole-cell preparations and suffer from limitations such as low efficacy, multiple side-effects, poor immunological memory and lack of cross-protection against different serovars of Leptospira spp. In light of the global prevalence of this disease, the development of a more effective vaccine against leptospirosis is of paramount importance. Genetic immunization is a promising alternative to conventional vaccine development...
September 4, 2017: Vaccine
https://www.readbyqxmd.com/read/28879600/infections-and-the-kidney-a-tale-from-the-tropics
#10
Nivedita Kamath, Arpana Iyengar
Tropical infections are caused by a variety of bacteria, viruses and parasitic organisms across varying geographical regions and are more often reported in adults than in children. Most of the infections are acute, presenting as a febrile illness with involvement of multiple organ systems, including the kidney. The gamut of renal manifestations extends from asymptomatic urinary abnormalities to acute kidney injury and-albeit rarely-chronic kidney disease. Tropical infections can involve the glomerular, tubulointerstitial and vascular compartments of the kidney...
September 6, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28874381/efficacy-of-a-new-recrystallized-enrofloxacin-hydrochloride-dihydrate-against-leptospirosis-in-a-hamster-model
#11
Alma Carrascosa, Lilia Gutierrez, Alejandro De la Peña, Irma E Candanosa, Graciela Tapia, Hector Sumano
A trial on Syrian hamsters (Mesocricetus auratus) infected with Leptospira interrogans serovar Canicola was established to compare treatment efficacies of daily IM injections of either 10 mg/kg of Baytril® 5% or the same dose of enrofloxacin dihydrate-hydrochloride (enro-C). Hamsters were experimentally infected via oral submucosa with 400 microorganisms/animal, in a sequential time-schedule to align initial treatment day as follows: group BE24 treated with Baytril® daily for 7 days after 24 of infection; group enro-C24 treated with enro-C as in group BE24; group BE74 treated also with Baytril®, but starting 72 h after infection; group enro-C74 treated as group BE74 but injecting enro-C...
September 5, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28873022/seroprevalence-of-leptospirosis-brucellosis-and-q-fever-in-a-wild-red-deer-cervus-elaphus-population-kept-in-a-fenced-reserve-in-absence-of-contact-with-livestock
#12
Jose María San-Miguel Ayanz, Francisco Javier Garcia-Peña, Paula García-Lunar, Luis Miguel Ortega-Mora, María José Ruano, Gema Álvarez-García, Esther Collantes-Fernández
Wildlife health is of interest for public and animal health because wild animals have been identified as important sentinels for the surveillance for zoonotic pathogens. This work investigated Brucella spp., Coxiella burnetii, and Leptospira spp. infection seroprevalence in a free-ranging red deer population. The study was conducted in a fenced reserve with controlled hunting activity in central Spain with animals that did not have any contact with livestock. Sampling was performed at two time points before and 5 years after the implementation of new management measures, including a reduction in the red deer population in the reserve...
September 5, 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28861677/seroepidemiological-survey-on-leptospira-spp-infection-in-wild-and-domestic-mammals-in-two-distinct-areas-of-the-semi-arid-region-of-northeastern-brazil
#13
Laís Ferrari Dos Santos, Maíra Freitas Guimarães, Gisele Oliveira de Souza, Ivo Wesley Gomes da Silva, Josenilton Rodrigues Santos, Sérgio Santos Azevedo, Marcelo Bahia Labruna, Marcos Bryan Heinemann, Mauricio Claudio Horta
Leptospirosis is a bacterial zoonotic disease that causes severe reproductive problems in livestock and generates economic losses for farmers. This study aimed to determine the seroprevalence of anti-Leptospira antibodies in small mammals, both wild and domestic, in two distinct areas of the semi-arid region of northeastern Brazil: the National Park of Serra das Confusões (NPSC), state of Piauí, a preserved area; and rural areas in the municipalities of Petrolina and Lagoa Grande, state of Pernambuco, non-preserved areas...
August 31, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28857412/epidemiological-and-clinical-features-of-leptospirosis-in-a-highly-endemic-area-over-three-time-periods
#14
Ljiljana Mišić-Majerus, Josipa Habuš, Zrinka Štritof, Nevenka Bujić, Vesna Mađarić, Gordana Kolaric-Sviben, Silvijo Vince, Zdenka Peršić, Nenad Turk
OBJECTIVES: To present the features of human leptospirosis over three time periods (1970-1975; 2000-2005; 2010-2015), to compare the collected data and determine whether the incidence, seasonal and spatial distribution, prevalence of presumptive infective serogroups and clinical features have changed over the last 50 years. METHODS: Epidemiological and clinical data obtained from patients hospitalized and treated in a focus of leptospirosis, Koprivnica-Križevci County in Croatia, were analysed...
August 31, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28846678/human-leptospirosis-in-seychelles-a-prospective-study-confirms-the-heavy-burden-of-the-disease-but-suggests-that-rats-are-not-the-main-reservoir
#15
Leon Biscornet, Koussay Dellagi, Frédéric Pagès, Jastin Bibi, Jeanine de Comarmond, Julien Mélade, Graham Govinden, Maria Tirant, Yann Gomard, Vanina Guernier, Erwan Lagadec, Jimmy Mélanie, Gérard Rocamora, Gildas Le Minter, Julien Jaubert, Patrick Mavingui, Pablo Tortosa
BACKGROUND: Leptospirosis is a bacterial zoonosis caused by pathogenic Leptospira for which rats are considered as the main reservoir. Disease incidence is higher in tropical countries, especially in insular ecosystems. Our objectives were to determine the current burden of leptospirosis in Seychelles, a country ranking first worldwide according to historical data, to establish epidemiological links between animal reservoirs and human disease, and to identify drivers of transmission. METHODS: A total of 223 patients with acute febrile symptoms of unknown origin were enrolled in a 12-months prospective study and tested for leptospirosis through real-time PCR, IgM ELISA and MAT...
August 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28841659/pre-treatment-with-lactobacillus-plantarum-prevents-severe-pathogenesis-in-mice-infected-with-leptospira-interrogans-and-may-be-associated-with-recruitment-of-myeloid-cells
#16
Hari-Hara Potula, Luciana Richer, Catherine Werts, Maria Gomes-Solecki
Recent estimates on global morbidity and mortality caused by Leptospirosis point to one million cases and almost 60,000 deaths a year worldwide, especially in resource poor countries. We analyzed how a commensal probiotic immunomodulator, Lactobacillus plantarum, affects Leptospira interrogans pathogenesis in a murine model of sub-lethal leptospirosis. We found that repeated oral pre-treatment of mice with live L. plantarum restored body weight to normal levels in mice infected with L. interrogans. Pre-treatment did not prevent L...
August 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28830472/a-process-for-developing-multisectoral-strategies-for-zoonoses-the-case-of-leptospirosis-in-fiji
#17
Simon A Reid, Anna Rodney, Mike Kama, Peter S Hill
BACKGROUND: Zoonotic diseases such as leptospirosis occur as a result of the often complex interactions that exist at the human-animal-environment interface. The most obvious consequence of this complexity is the need for the health sector to partner with institutions in other sectors of society such as agriculture, labour and local government. This multisectoral engagement is complicated by the different agendas and cultures of the various institutions and their ability to "see" their role and ant benefits in a collaborative response...
August 22, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28818623/leptospira-species-molecular-epidemiology-in-the-genomic-era
#18
K Caimi, S A Repetto, V Varni, P Ruybal
Leptospirosis is a zoonotic disease which global burden is increasing often related to climatic change. Hundreds of whole genome sequences from worldwide isolates of Leptospira spp. are available nowadays, together with online tools that permit to assign MLST sequence types (STs) directly from raw sequence data. In this work we have applied R7L-MLST to near 500 genomes and strains collection globally distributed. All 10 pathogenic species as well as intermediate were typed using this MLST scheme. The correlation observed between STs and serogroups in our previous work, is still satisfied with this higher dataset sustaining the implementation of MLST to assist serological classification as a complementary approach...
August 15, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28817942/-the-current-status-of-diagnostic-tools-for-leptospirosis
#19
Mitsumasa Saito, Yasuhiko Nikaido, Masahiro Matsumoto, Midori Ogawa, Sharon Y A M Villanueva
Leptospirosis is a worldwide zoonosis caused by pathogenic Leptospira spp. The severity of leptospirosis vary from mild, flu-like disease to a more severe form, Weil's disease causing jaundice, hemorrhage, renal failure, and even death. Every year, 300,000‒500,000 cases of severe leptospirosis are reported around the world, with the case fatality rate being 10‒30%. The usual diagnostic tools for leptospirosis are 1) direct observation of leptospires in blood and urine under dark-field microscope, 2) isolation of leptospires from blood, cerebrospinal fluid (CSF), or urine samples by culture, 3) microscopic agglutination test (MAT) to detect anti-Leptospira antibodies in serum, and 4) PCR to detect Leptospira DNA...
August 15, 2017: JARMAM: Journal of the Association for Rapid Method and Automation in Microbiology
https://www.readbyqxmd.com/read/28811249/male-specific-pulmonary-hemorrhage-and-cytokine-gene-expression-in-golden-hamster-in-early-phase-leptospira-interrogans-serovar-hebdomadis-infection
#20
Rina Tomizawa, Hiromu Sugiyama, Ryoichi Sato, Makoto Ohnishi, Nobuo Koizumi
Leptospirosis causes severe clinical signs more frequently in men than in women, but the mechanism underlying the gender differences in leptospirosis remains unclear. In this study, petechial hemorrhage was observed in male but not in female hamster lung tissues infected with Leptospira interrogans serovar Hebdomadis at 120 h pi, demonstrating that male hamsters were more susceptible to the development of a severe disease upon Leptospira infection. No leptospiral DNA was detected in the lung tissues at 120 h pi when pulmonary hemorrhage was observed, indicating that pulmonary hemorrhage is attributable to the immune reactions of the host rather than from the direct effect of leptospires...
August 12, 2017: Microbial Pathogenesis
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