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Streptococcus equi

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https://www.readbyqxmd.com/read/28906182/multi-locus-sequence-typing-of-streptococcus-equi-subspecies-zooepidemicus-strains-isolated-from-cats
#1
Ann P Britton, Shlomo E Blum, Carolyn Legge, Ken Sojonky, Erin N Zabek
Streptococcus equi subspecies zooepidemicus ( S. zooepidemicus) causes outbreaks of fatal respiratory disease in dog shelters and fatal respiratory and neurologic disease in cat shelters. We conducted multi-locus sequence typing analysis on S. zooepidemicus isolates from 5 Canadian and 3 Israeli cats with severe respiratory and neurologic disease, plus 1 isolate from a clinically normal shelter cat. Our aim was to determine if feline outbreaks are clonal and whether there is commonality between feline and canine strains...
September 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28860059/absence-of-differences-among-low-middle-and-high-molecular-weight-hyaluronan-in-activating-murine-immune-cells-in-vitro
#2
Barbora Šafránková, Martina Hermannová, Kristina Nešporová, Vladimír Velebný, Lukáš Kubala
Hyaluronan (HA) effects on immune response are suggested to be dependent on HA molecular weight (MW), as low MW HA should activate immune cells in contrast to high MW HA. However, some current studies do not support this conception and emphasize the importance of the form of preparation of HA, particularly with respect to its purity and origin. We compared the activation of mouse immune cells by HA samples (100kDa, 500kDa, and 997kDa) prepared from HA originating from rooster comb, and HA samples (71kDa, 500kDa, and 1000kDa) prepared from pharmacological grade HA originating from Streptococcus equi...
August 30, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28765219/genomic-dissection-of-an-icelandic-epidemic-of-respiratory-disease-in-horses-and-associated-zoonotic-cases
#3
Sigríður Björnsdóttir, Simon R Harris, Vilhjálmur Svansson, Eggert Gunnarsson, Ólöf G Sigurðardóttir, Kristina Gammeljord, Karen F Steward, J Richard Newton, Carl Robinson, Amelia R L Charbonneau, Julian Parkhill, Matthew T G Holden, Andrew S Waller
Iceland is free of the major infectious diseases of horses. However, in 2010 an epidemic of respiratory disease of unknown cause spread through the country's native horse population of 77,000. Microbiological investigations ruled out known viral agents but identified the opportunistic pathogen Streptococcus equi subsp. zooepidemicus (S. zooepidemicus) in diseased animals. We sequenced the genomes of 257 isolates of S. zooepidemicus to differentiate epidemic from endemic strains. We found that although multiple endemic clones of S...
August 1, 2017: MBio
https://www.readbyqxmd.com/read/28757029/diversity-of-streptococcus-equi-subsp-zooepidemicus-strains-isolated-from-the-spanish-sheep-and-goat-population-and-the-identification-function-and-prevalence-of-a-novel-arbutin-utilisation-system
#4
Karen F Steward, Carl Robinson, Matthew T G Holden, Simon R Harris, Ana Fernández Ros, Gema Chacón Pérez, Rafael Baselga, Andrew S Waller
The zoonotic bacterium Streptococcus equi subsp. zooepidemicus (S. zooepidemicus) is a diverse, opportunistic pathogen that can cause mastitis in dairy sheep and goats. We used multilocus sequence typing (MLST) to define the genetic diversity of 60 isolates of S. zooepidemicus, which were recovered from sheep and goats in Spain between 2003 and 2010. We identify a novel clonal complex based on sequence type (ST), ST-236, which accounted for 39 of the 60 isolates. A representative ST-236 strain, S. zooepidemicus strain C7 (SzC7), was sequenced and interrogated for the presence of novel nutritional uptake or utilisation systems, the acquisition of which have previously been shown to be important for environmental adaptation in other streptococcal pathogens...
August 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28755579/estradiol-cypionate-aided-treatment-for-experimentally-induced-ascending-placentitis-in-mares
#5
Bruna R Curcio, Igor F Canisso, Fernanda M Pazinato, Luciana A Borba, Lorena S Feijó, Vitoria Muller, Ilusca S Finger, Ramiro E Toribio, Carlos E W Nogueira
The overall goal of this study was to assess the efficacy of various therapeutic combinations of estradiol cypionate (ECP, a long-acting estrogen) and altrenogest (ALT, a long-acting progestin) in addition to basic treatment for placentitis with trimethoprim-sulfamethoxazole (TMS) and flunixin meglumine (FM). Specific outcomes measured in this experiment were (i) time from induction of bacterial placentitis to delivery, and foal parameters (high-risk, survival, and birth weight); and (ii) serum steroid concentrations (progesterone, 17α-hydroxyprogesterone, 17β-estradiol, and cortisol) in response to treatment...
October 15, 2017: Theriogenology
https://www.readbyqxmd.com/read/28749324/investigation-of-the-fim1-putative-pilus-locus-of-streptococcus-equi-subspecies-equi
#6
Karen Frances Steward, Carl Robinson, Duncan J Maskell, Chiara Nenci, Andrew Stephen Waller
The Gram-positive bacterium Streptococcus equi subspecies equi (S. equi) is the causative agent of strangles, among the most frequently diagnosed infectious diseases of horses worldwide. Genome analysis of S. equi strain 4047 (Se4047) identified a putative operon, Fim1, with similarity to the pilus loci of other Gram-positive bacteria. The Fim1 locus was present in all strains of S. equi and its close relative S. equi subspecies zooepidemicus (S. zooepidemicus) that have been studied to date. In this study we provide evidence that the putative structural pilus proteins, SEQ_0936 and CNE, are produced on the cell surface during in vitro growth and in vivo infection...
July 28, 2017: Microbiology
https://www.readbyqxmd.com/read/28740343/distinct-gut-microbiota-profiles-in-patients-with-primary-sclerosing-cholangitis-and-ulcerative-colitis
#7
Lukas Bajer, Miloslav Kverka, Martin Kostovcik, Peter Macinga, Jiri Dvorak, Zuzana Stehlikova, Jan Brezina, Pavel Wohl, Julius Spicak, Pavel Drastich
AIM: To characterize the gut bacterial microbiota of patients with primary sclerosing cholangitis (PSC) and ulcerative colitis (UC). METHODS: Stool samples were collected and relevant clinical data obtained from 106 study participants, 43 PSC patients with (n = 32) or without (n = 11) concomitant inflammatory bowel disease, 32 UC patients, and 31 healthy controls. The V3 and V4 regions of the 16S ribosomal RNA gene were sequenced on Illumina MiSeq platform to cover low taxonomic levels...
July 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28681687/retrospective-study-of-fatal-pneumonia-in-racehorses
#8
Francisco R Carvallo, Francisco A Uzal, Santiago S Diab, Ashley E Hill, Rick M Arthur
Respiratory diseases have a major impact on racehorses in training and are often cited as the second most common reason of horses failing to perform. Cases were submitted by the California Horse Racing Board to the California Animal Health and Food Safety laboratory for postmortem examination between January 1, 2005 and December 31, 2014. We determined the demographics of racehorses with fatal pneumonia, characterized the pathologic findings in animals with a postmortem diagnosis of respiratory infection, and determined the most significant pathogens associated with lower respiratory tract disease...
July 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28666619/development-of-a-multiplex-pcr-for-identification-of-%C3%AE-hemolytic-streptococci-relevant-to-human-infections-and-serotype-distribution-of-invasive-streptococcus-agalactiae-in-thailand
#9
Anusak Kerdsin, Rujirat Hatrongjit, Shigeyuki Hamada, Yukihiro Akeda, Marcelo Gottschalk
A multiplex polymerase chain reaction (mPCR) was developed for simultaneous detection (single reaction) of genes specific to five frequent clinically relevant β-hemolytic streptococcal species: Streptococcus pyogenes (Spy1258), Streptococcus agalactiae (cfb and cpn60), Streptococcus dysgalactiae subsp. equisimilis (16S-23S intergenic spacer) , S. equi subsp. zooepidemicus (esaA and sorD), and Streptococcus anginosus group (moaC). No cross-reaction was observed with other bacterial species. This test was validated and successfully used with 725 clinical isolates involved in pathological conditions in Thailand and collected between March 2014 and December 2015...
June 27, 2017: Molecular and Cellular Probes
https://www.readbyqxmd.com/read/28661019/prevalence-of-methicillin-resistant-staphylococcus-aureus-from-equine-nasopharyngeal-and-guttural-pouch-wash-samples
#10
A G Boyle, S C Rankin, L A Duffee, D Morris
BACKGROUND: Methicillin-resistant Staphylococcus aureus (MRSA) is recognized as a cause of nosocomial infections in both human and veterinary medicine. Studies that examine the nasopharynx and guttural pouches of the horse as carriage sites for MRSA have not been reported. HYPOTHESIS/OBJECTIVE: MRSA colonizes the nasopharynx and guttural pouch of horses. To determine the prevalence of MRSA in equine nasopharyngeal wash (NPW) and guttural pouch lavage (GPL) samples in a field population of horses...
September 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28600445/acute-fatal-haemorrhagic-pneumonia-caused-by-streptococcus-equi-zooepidemicus-in-greyhounds-in-ireland-with-subsequent-typing-of-the-isolates
#11
W FitzGerald, B Crowe, P Brennan, J P Cassidy, M Leahy, M C McElroy, M Casey, A Waller, C Mitchell
No abstract text is available yet for this article.
June 9, 2017: Veterinary Record
https://www.readbyqxmd.com/read/28569630/a-case-control-study-developing-a-model-for-predicting-risk-factors-for-high-sem-specific-antibody-titers-after-natural-outbreaks-of-streptococcus-equi-subsp-equi-infection-in-horses
#12
Ashley G Boyle, Meagan A Smith, Raymond C Boston, Darko Stefanovski
OBJECTIVE To develop a risk prediction model for factors associated with an SeM-specific antibody titer ≥ 3,200 in horses after naturally occurring outbreaks of Streptococcus equi subsp equi infection and to validate this model. DESIGN Case-control study. ANIMALS 245 horses: 57 horses involved in strangles outbreaks (case horses) and 188 healthy horses (control horses). PROCEDURES Serum samples were obtained from the 57 cases over a 27.5-month period after the start of outbreaks; serum samples were obtained once from the 188 controls...
June 15, 2017: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/28569133/defining-the-abc-of-gene-essentiality-in-streptococci
#13
Amelia R L Charbonneau, Oliver P Forman, Amy K Cain, Graham Newland, Carl Robinson, Mike Boursnell, Julian Parkhill, James A Leigh, Duncan J Maskell, Andrew S Waller
BACKGROUND: Utilising next generation sequencing to interrogate saturated bacterial mutant libraries provides unprecedented information for the assignment of genome-wide gene essentiality. Exposure of saturated mutant libraries to specific conditions and subsequent sequencing can be exploited to uncover gene essentiality relevant to the condition. Here we present a barcoded transposon directed insertion-site sequencing (TraDIS) system to define an essential gene list for Streptococcus equi subsp...
May 31, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28532794/immunogenicity-of-phospholipase-a2-toxins-and-their-role-in-streptococcus-equi-pathogenicity
#14
M R López-Álvarez, M Salze, A Cenier, C Robinson, R Paillot, A S Waller
Streptococcus equi subsp. equi (S. equi) is the causative agent of strangles, one of the most frequently diagnosed infectious diseases of horses worldwide. Phospholipase A2 toxins (PLA2) cleave phospholipid molecules at position sn-2 contributing to the production of leukotrienes that are important inflammatory mediators. Two homologous phospholipases, SlaA and SlaB are encoded by the S. equi genome suggesting that PLA2 toxins may contribute to its pathogenicity. Here we report the immunogenicity and role of PLA2 toxins during natural and experimental infection of horses with S...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28492782/-outbreak-of-nephritis-by-streptococcus-equi-subspecies-zooepidemicus-case-control-study-in-the-municipality-of-monte-santo-de-minas-minas-gerais-brazil-2013
#15
Patricia de Almeida Soares, Heloísa Helena Pelluci Duarte, Junara Viana de Oliveira, Leandro Leão Faúla, Rosângela Stadnick Lauth de Almeida Torres, Margareth Leonor Penkal, Mark Drew Crosland Guimarães
OBJECTIVE: to investigate an outbreak of nephritis by Streptococcus zooepidemicus in Monte Santo de Minas, Minas Gerais State, Brazil. METHODS: a case-control study and attempt to isolate the bacterial agent were carried out from January to April 2013, using clinical and laboratory data, interviews and inspections. RESULTS: 417 suspected cases were reported, of which 175 (42.0%) were confirmed; 90.9% lived in that municipality, of which 67...
April 2017: Epidemiologia e Servicos de Saude: Revista do Sistema Unico de Saude do Brasil
https://www.readbyqxmd.com/read/28460559/discrimination-of-streptococcus-equi-subsp-equi-and-streptococcus-equi-subsp-zooepidemicus-using-matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry
#16
Rinosh J Mani, Anil J Thachil, Akhilesh Ramachandran
Accurate and timely identification of infectious etiologies is of great significance in veterinary microbiology, especially for critical diseases such as strangles, a highly contagious disease of horses caused by Streptococcus equi subsp. equi. We evaluated a matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) platform for use in species- and subspecies-level identification of S. equi isolates from horses and compared it with an automated biochemical system. We used 25 clinical isolates each of S...
April 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28335829/comparison-of-nasopharyngeal-and-guttural-pouch-specimens-to-determine-the-optimal-sampling-site-to-detect-streptococcus-equi-subsp-equi-carriers-by-dna-amplification
#17
Ashley G Boyle, Darko Stefanovski, Shelley C Rankin
BACKGROUND: Streptococcus equi subsp equi (S. equi) is the cause of "equine strangles" which is a highly infectious upper respiratory disease. Detection of S. equi is influenced by site of specimen collection, method of sampling, and type of diagnostic test that is performed. We hypothesized i) that a loop-mediated isothermal amplification (LAMP) assay that targets the S. equi-specific eqbE gene would be more sensitive than a realtime PCR assay that targets the S. equi-specific seeI gene and ii) that LAMP of specimens obtained by guttural pouch lavage (GPL) would be more sensitive than LAMP of nasopharyngeal specimens to identify S...
March 23, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28293868/engineering-s-equi-subsp-zooepidemicus-towards-concurrent-production-of-hyaluronic-acid-and-chondroitin-biopolymers-of-biomedical-interest
#18
Donatella Cimini, Ileana Dello Iacono, Elisabetta Carlino, Rosario Finamore, Odile F Restaino, Paola Diana, Emiliano Bedini, Chiara Schiraldi
Glycosaminoglycans, such as hyaluronic acid and chondroitin sulphate, are not only more and more required as main ingredients in cosmeceutical and nutraceutical preparations, but also as active principles in medical devices and pharmaceutical products. However, while biotechnological production of hyaluronic acid is industrially established through fermentation of Streptococcus spp. and recently Bacillus subtilis, biotechnological chondroitin is not yet on the market. A non-hemolytic and hyaluronidase negative S...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28271546/factors-associated-with-survival-in-97-horses-with-septic-pleuropneumonia
#19
M G Arroyo, N M Slovis, G E Moore, S D Taylor
BACKGROUND: Septic pleuropneumonia is a common cause of morbidity and mortality in horses, but there is limited data available regarding factors associated with survival. HYPOTHESIS/OBJECTIVES: To identify factors predictive of survival in horses with septic pleuropneumonia. ANIMALS: A total of 97 horses with septic pleuropneumonia at 2 referral institutions. METHODS: A retrospective study was performed. A diagnosis of septic pleuropneumonia was based on the presence of sepsis, pleural effusion, and positive bacterial culture from tracheal aspiration (TA) or pleural fluid (PF)...
May 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28201995/zoonotic-necrotizing-myositis-caused-by-streptococcus-equi-subsp-zooepidemicus-in-a-farmer
#20
Bård Reiakvam Kittang, Veronika Kuchařová Pettersen, Oddvar Oppegaard, Dag Harald Skutlaberg, Håvard Dale, Harald G Wiker, Steinar Skrede
BACKGROUND: Streptococcus equi subsp. zooepidemicus is a beta-hemolytic group C streptococcus mainly causing infections in domesticated animals. Here we describe the first case of zoonotic necrotizing myositis caused by this bacterium. CASE PRESENTATION: The patient was a 73-year-old, previously healthy farmer with two asymptomatic Shetland ponies in his stable. After close contact with the ponies while feeding them, he rapidly developed erythema of his left thigh and sepsis with multiple organ failure...
February 15, 2017: BMC Infectious Diseases
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