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Streptococcus equi

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https://www.readbyqxmd.com/read/28293868/engineering-s-equi-subsp-zooepidemicus-towards-concurrent-production-of-hyaluronic-acid-and-chondroitin-biopolymers-of-biomedical-interest
#1
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
#2
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)...
March 8, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28201995/zoonotic-necrotizing-myositis-caused-by-streptococcus-equi-subsp-zooepidemicus-in-a-farmer
#3
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
https://www.readbyqxmd.com/read/28199901/cd44-deficiency-enhanced-streptococcus-equi-ssp-zooepidemicus-dissemination-and-inflammation-response-in-a-mouse-model
#4
Qiang Fu, Pingping Xiao, Yaosheng Chen, Zigong Wei, Xiaohong Liu
Streptococcus equi ssp. zooepidemicus (S. zooepidemicus) is responsible for peritonitis, septicemia, meningitis, arthritis and several other serious diseases in various species. Recent studies have demonstrated that CD44 is implicated in the process of host defense against pathogenic microorganisms. In the present study, the role of CD44 in the host response to S. zooepidemicus infection was investigated in a mouse model. Upon intraperitoneal infection with S. zooepidemicus, the expression of CD44 on the peritoneal exudate cells from wild-type (WT) mice was increased...
February 9, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28139956/bacterial-microbiota-in-harbor-seals-phoca-vitulina-from-the-north-sea-of-schleswig-holstein-germany-around-the-time-of-morbillivirus-and-influenza-epidemics
#5
Ursula Siebert, Marion Rademaker, Sophie A Ulrich, Peter Wohlsein, Katrin Ronnenberg, Ellen Prenger-Berninghoff
We present microbiologic findings in harbor seal (phoca; Phoca vitulina ) carcasses collected from the North Sea of Schleswig-Holstein, Germany, 1996-2014, and interpret results in relation to potential variations caused by phocine distemper virus and influenza A virus mass mortalities. We conducted microbiologic investigations on 2,124 tissue samples from lung, liver, kidney, spleen, intestine, and mesenteric lymph nodes from 549 dead harbor seals of the German North Sea. A large variety of bacteria, including potentially pathogenic species such as Bordetella bronchiseptica , Brucella spp...
January 31, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28131378/multiplex-pcr-based-identification-of-streptococcus-canis-streptococcus-zooepidemicus-and-streptococcus-dysgalactiae-subspecies-from-dogs
#6
M Moriconi, E Acke, D Petrelli, S Preziuso
Streptococcus canis (S. canis), Streptococcus equi subspecies zooepidemicus (S. zooepidemicus) and Streptococcus dysgalactiae subspecies (S. dysgalactiae subspecies) are β-haemolytic Gram positive bacteria infecting animals and humans. S. canis and S. zooepidemicus are considered as two of the major zoonotic species of Streptococcus, while more research is needed on S. dysgalactiae subspecies bacteria. In this work, a multiplex-PCR protocol was tested on strains and clinical samples to detect S. canis, S. dysgalactiae subspecies and S...
February 2017: Comparative Immunology, Microbiology and Infectious Diseases
https://www.readbyqxmd.com/read/28129093/immune-mediated-muscle-diseases-of-the-horse
#7
S A Durward-Akhurst, S J Valberg
In horses, immune-mediated muscle disorders can arise from an overzealous immune response to concurrent infections or potentially from an inherent immune response to host muscle antigens. Streptococcus equi ss. equi infection or vaccination can result in infarctive purpura hemorrhagica (IPH) in which vascular deposition of IgA-streptococcal M protein complexes produces ischemia and complete focal infarction of skeletal muscle and internal organs. In Quarter Horse-related breeds with immune-mediated myositis, an apparent abnormal immune response to muscle antigens results in upregulation of major histocompatibility complex class (MHC) I and II on muscle cell membranes, lymphocytic infiltration of lumbar and gluteal myofibers, and subsequent gross muscle atrophy...
January 1, 2017: Veterinary Pathology
https://www.readbyqxmd.com/read/28062002/cd44-enhances-macrophage-phagocytosis-and-plays-a-protective-role-in-streptococcus-equi-subsp-zooepidemicus-infection
#8
Qiang Fu, Zigong Wei, Pingping Xiao, Yaosheng Chen, Xiaohong Liu
Streptococcus equi subsp. zooepidemicus (S. zooepidemicus) is an important pathogen associated with a wide range of diseases in many mammalian species. CD44 is a transmembrane adhesion molecule involved in innate and adaptive immune responses. The aim of this study was to determine the protective role of CD44 during S. zooepidemicus infection. CD44-deficient mice exhibited reduced macrophage accumulation in the bronchoalveolar space and enhanced bacterial outgrowth and dissemination, which resulted in reduced mouse survival...
January 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/27997716/collagen-like-proteins-of-pathogenic-streptococci
#9
REVIEW
Slawomir Lukomski, Beth A Bachert, Flavia Squeglia, Rita Berisio
The collagen domain, which is defined by the presence of the Gly-X-Y triplet repeats, is amongst the most versatile and widespread known structures found in proteins from organisms representing all three domains of life. The streptococcal collagen-like (Scl) proteins are widely present in pathogenic streptococci, including Streptococcus pyogenes, S. agalactiae, S. pneumoniae, and S. equi. Experiments and bioinformatic analyses support the hypothesis that all Scl proteins are homotrimeric and cell wall-anchored...
March 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/27901387/quantification-and-characterization-of-pleural-fluid-in-healthy-dogs-with-thoracostomy-tubes
#10
Germaine C Hung, M Casey Gaunt, Joseph E Rubin, Gregory S Starrak, Sherisse A Sakals
OBJECTIVE To quantify and characterize pleural fluid collected from healthy dogs after placement of a thoracostomy tube (TT). ANIMALS 8 healthy Coonhound-cross dogs (mean ± SD weight, 27.2 ± 1.6 kg). PROCEDURES Thoracic CT of each dog was performed before placement of a TT and daily thereafter for 7 days. Thoracic fluid volume was calculated from CT images. Effusion was aspirated when detected; volume was recorded, and cytologic analysis and bacterial culture were performed. RESULTS Mean ± SD volume of pleural effusion detected by CT was 1...
December 2016: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/27866939/-first-case-report-of-streptococcus-equi-subsp-zooepidemicus-post-infectious-acute-glomerulonephritis-in-france
#11
Nicolas Le-Berre, Pierre Filipozzi, Laurent Martin, Luc Frimat, Sophie Girerd
Post-infectious glomerulonephritis has become exceptional in France because streptococcus infections are well-treated. When they appear, clinical and biological symptoms are mostly typical and associate acute nephritic syndrome, acute renal failure, proteinuria, hematuria and low complement. We are reporting the first French case of acute post-infectious glomerulonephritis related to Streptococcus equi subsp. zooepidemicus, which is commonly found in horses and rarely in human pathology, and of which contamination is by direct contact with sick horses or by ingestion of non-pasteurized milk...
February 2017: Néphrologie & Thérapeutique
https://www.readbyqxmd.com/read/27847375/evaluation-of-veterinary-specific-interpretive-criteria-for-susceptibility-testing-of-streptococcus-equi-subspecies-with-trimethoprim-sulfamethoxazole-and-trimethoprim-sulfadiazine
#12
Carmen Sadaka, Theo Kanellos, Luca Guardabassi, Joseph Boucher, Jeffrey L Watts
Antimicrobial susceptibility test results for trimethoprim-sulfadiazine with Streptococcus equi subspecies are interpreted based on human data for trimethoprim-sulfamethoxazole. The veterinary-specific data generated in this study support a single breakpoint for testing trimethoprim-sulfamethoxazole and/or trimethoprim-sulfadiazine with S. equi This study indicates trimethoprim-sulfamethoxazole as an acceptable surrogate for trimethoprim-sulfadiazine with S. equi.
January 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/27829495/clinical-and-microbiological-features-of-bacteremia-with-streptococcus-equi
#13
Kristina Trell, Bo Nilson, Ann-Cathrine Petersson, Magnus Rasmussen
Streptococcus equi (SE) rarely causes human infections. We identified 18 SE isolates from blood cultures. The focus of infection was unknown (n = 5), arthritis (n = 3), catheter-related (n = 2), pneumonia (n = 2), or other (n = 6). There were no fatalities. Several patients had animal contacts but there were no indications of clonal outbreaks.
February 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/27815272/extracellular-nucleases-of-streptococcus-equi-subsp-zooepidemicus-degrade-neutrophil-extracellular-traps-and-impair-macrophage-activity-of-the-host
#14
Fang Ma, Xiao Guo, Hongjie Fan
The pathogen Streptococcus equi subsp. zooepidemicus is associated with a wide range of animals, including humans, and outbreaks frequently occur in pigs, equines, and goats. Thus far, few studies have assessed interactions between the host immune system and S. equi subsp. zooepidemicus and how these interactions explain the wide host spectrum of S. equi subsp. zooepidemicus Neutrophils, the first line of innate immunity, possess a defense mechanism called neutrophil extracellular traps (NETs), which primarily consist of DNA and granule proteins that trap bacteria via charge interactions...
January 15, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/27749921/novel-igg-degrading-enzymes-of-the-igde-protease-family-link-substrate-specificity-to-host-tropism-of-streptococcus-species
#15
Christian Spoerry, Pontus Hessle, Melanie J Lewis, Lois Paton, Jenny M Woof, Ulrich von Pawel-Rammingen
Recently we have discovered an IgG degrading enzyme of the endemic pig pathogen S. suis designated IgdE that is highly specific for porcine IgG. This protease is the founding member of a novel cysteine protease family assigned C113 in the MEROPS peptidase database. Bioinformatical analyses revealed putative members of the IgdE protease family in eight other Streptococcus species. The genes of the putative IgdE family proteases of S. agalactiae, S. porcinus, S. pseudoporcinus and S. equi subsp. zooepidemicus were cloned for production of recombinant protein into expression vectors...
2016: PloS One
https://www.readbyqxmd.com/read/27726373/virulent-and-vaccine-strains-of-streptococcus-equi-ssp-zooepidemicus-have-different-influences-on-phagocytosis-and-cytokine-secretion-of-macrophages
#16
Jie Peng, Zhe Ma, Chengwei Hua, Huixing Lin, Hui Zhang, Chengping Lu, Hongjie Fan
Swine streptococcosis is a significant threat to the Chinese pig industry, and Streptococcus equi ssp. zooepidemicus (SEZ) is one of the major pathogens. SEZ ATCC35246 is a classical virulent strain, while SEZ ST171 is a Chinese attenuated vaccine strain. In this study, we employed stable isotope labeling by amino acids in cell culture and liquid chromatography/mass spectrometry (LC/MS) to determine the differential response of macrophages to infection by these two strains. Eighty-seven upregulated proteins and 135 downregulated proteins were identified...
October 11, 2016: Journal of Proteome Research
https://www.readbyqxmd.com/read/27684571/effect-of-dose-on-intra-articular-amikacin-sulfate-concentrations-following-intravenous-regional-limb-perfusion-in-horses
#17
Alison Harvey, Isabelle Kilcoyne, Barbara A Byrne, Jorge Nieto
OBJECTIVE: To compare synovial concentrations of amikacin following intravenous regional limb perfusion (IVRLP) with two different doses, and to compare their ability to reach target concentrations for bacterial isolates from common orthopedic conditions. STUDY DESIGN: Randomized crossover experiment. ANIMALS: Six adult horses. METHODS: Horses received IVRLP with 2 and 3 g of amikacin in the cephalic vein of alternate limbs (20 minutes tourniquet application and ≥14 days washout period)...
November 2016: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/27659898/reducing-exposure-to-pathogens-in-the-horse-a-preliminary-study-into-the-survival-of-bacteria-on-a-range-of-equine-bedding-types
#18
K Yarnell, M Le Bon, N Turton, M Savova, A McGlennon, S Forsythe
AIMS: To compare the rate of growth of four microbial strains that cause disease in the horse, on four commonly used types of bedding. The moisture-holding capacity of each bedding type was also tested. METHODS AND RESULTS: Microbial strains included Streptococcus equi, Streptococcus zooepidemicus, Fusobacterium necrophorum, Dichelobacter nodosus and Dermatophilus congolensis. The bedding types tested were Pinus sylvestris (Scots pine shavings), Pinus nigra (Corsican pine shavings), Picea sitchensis (Sitka spruce shavings), Cannabis sativa (hemp) and chopped wheat straw...
January 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/27651915/streptococcus-equi-subspecies-equi-in-horses-in-israel-seroprevalence-and-strain-types
#19
S Tirosh-Levy, S E Blum, K F Steward, A S Waller, A Steinman
The purpose of this cross-sectional study was to determine the seroprevalence of Streptococcus equi in Israel, to monitor seropositive horses over time and to identify archived strains that were recovered from Israeli horses. A serological survey of 200 healthy horses on 20 farms throughout Israel was performed to detect recent exposure to S equi antigens A and C via indirect ELISA. Seroprevalence was 9.5 per cent (19/200) and positive horses were found in 30 per cent (6/20) of the farms. Sixteen horses that returned a positive serology result were retested three and six months later...
2016: Veterinary Record Open
https://www.readbyqxmd.com/read/27651677/molecular-characterization-of-virulence-genes-of-streptococcus-equi-subsp-equi-and-streptococcus-equi-subsp-zooepidemicus-in-equines
#20
R Javed, A K Taku, Rakhi Gangil, R K Sharma
AIM: The aim was to determine the occurrence of streptococci in equines in Jammu (R. S. Pura, Katra), characterization of Streptococci equi subsp. equi and Streptococcus equi subsp. zooepidemicus with respect to their virulence traits and to determine antibiotic sensitivity pattern of virulent Streptococcus isolates. MATERIALS AND METHODS: A total of 96 samples were collected from both clinically affected animals (exhibiting signs of respiratory tract disease) and apparently healthy animals and were sent to laboratory...
August 2016: Veterinary World
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