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Streptococcus suis

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https://www.readbyqxmd.com/read/29352469/amoxicillin-current-use-in-swine-medicine
#1
REVIEW
D G S Burch, D Sperling
Amoxicillin has become a major antimicrobial substance in pig medicine for the treatment and control of severe, systemic infections such as Streptococcus suis. The minimum inhibitory concentration 90% (MIC 90) is 0.06 μg amoxicillin/ml, and the proposed epidemiological cut-off value (ECOFF) is 0.5 μg/ml, giving only 0.7% of isolates above the ECOFF or of reduced susceptibility. Clinical breakpoints have not been set for amoxicillin against porcine pathogens yet, hence the use of ECOFFs. It has also been successfully used for bacterial respiratory infections caused by Actinobacillus pleuropneumoniae and Pasteurella multocida...
January 19, 2018: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29350165/novel-streptococcus-suis-sequence-type-834-among-humans-madagascar
#2
Mihaja Raberahona, Saïda Rasoanandrasana, Vonintsoa Lalaina Rahajamanana, Felana Ranaivo-Rabetokotany, Volatiana Andriananja, Fetra Angelot Rakotomalala, Mamy Jean de Dieu Randria, Luc Rakotovao, Corinne Marois-Créhan, Véronique Tocqueville, Fabrice Touzain, Mala Rakoto-Andrianarivelo
Two cases of meningitis caused by Streptococcus suis occurred in Madagascar, 1 in 2015 and 1 in 2016. We report the characterization of the novel sequence type, 834, which carried the mrp+/sly+/epf+ virulence marker and a mutation G→T at position 174, leading to a substitution mutS1 to mutS284.
February 2018: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29316972/genomic-comparisons-of-streptococcus-suis-serotype-9-strains-recovered-from-diseased-pigs-in-spain-and-canada
#3
Han Zheng, Pengchen Du, Xiaotong Qiu, Anusak Kerdsin, David Roy, Xuemei Bai, Jianguo Xu, Ana I Vela, Marcelo Gottschalk
Streptococcus suis is one of the most important bacterial pathogens in the porcine industry and also a zoonotic agent. Serotype 9 is becoming one of the most prevalent serotypes within the S. suis population in certain European countries. In the present study, serotype 9 strains isolated from a country where infection due to this serotype is endemic (Spain), were compared to those recovered from Canada, where this serotype is rarely isolated from diseased pigs. For comparison purposes, strains from Brazil and the only strain isolated from a human case, in Thailand, were also incorporated...
January 9, 2018: Veterinary Research
https://www.readbyqxmd.com/read/29316613/limited-interactions-between-streptococcus-suis-and-haemophilus-parasuis-in-in-vitro-co-infection-studies
#4
Annabelle Mathieu-Denoncourt, Corinne Letendre, Jean-Philippe Auger, Mariela Segura, Virginia Aragon, Sonia Lacouture, Marcelo Gottschalk
Streptococcus suis and Haemophilus parasuis are normal inhabitants of the porcine upper respiratory tract but are also among the most frequent causes of disease in weaned piglets worldwide, causing inflammatory diseases such as septicemia, meningitis and pneumonia. Using an in vitro model of infection with tracheal epithelial cells or primary alveolar macrophages (PAMs), it was possible to determine the interaction between S. suis serotype 2 and H. parasuis strains with different level of virulence. Within H...
January 6, 2018: Pathogens
https://www.readbyqxmd.com/read/29284248/streptococcus-suis-a-re-emerging-pathogen-associated-with-occupational-exposure-to-pigs-or-pork-products-part-i-epidemiology
#5
Jacek Dutkiewicz, Jacek Sroka, Violetta Zając, Bernard Wasiński, Ewa Cisak, Anna Sawczyn, Anna Kloc, Angelina Wójcik-Fatla
<i>Streptococcus suis</i> (ex Elliot 1966, Kilpper-Bälz & Schleifer 1987) is a facultatively anaerobic Gram-positive ovoid or coccal bacterium surrounded by a polysaccharide capsule. Based on the antigenic diversity of the capsule, <i>S. suis</i> strains are classified serologically into 35 serotypes. <i>Streptococcus suis</i> is a commensal of pigs, commonly colonizing their tonsils and nasal cavities, mostly in weaning piglets between 4-10 weeks of age. This species occurs also in cattle and other mammals, in birds and in humans...
December 23, 2017: Annals of Agricultural and Environmental Medicine: AAEM
https://www.readbyqxmd.com/read/29247804/infection-and-adaption-based-proteomic-changes-of-streptococcus-suis-serotype-2-in-a-pig-model
#6
Yanfei Yu, Yunyun Qian, Dechao Du, Quan Li, Chenyang Xu, Hanze Liu, Mianmian Chen, Huochun Yao, Chengping Lu, Wei Zhang
Streptococcus suis (S. suis) is an emerging zoonotic agent that is responsible for significant economic losses to the porcine industry worldwide. However, most research regarding the pathogenic mechanisms has used in vitro cultures of S. suis, which may not provide an accurate representation of the in vivo biological activities. In this study, 188 differential abundance S. suis proteins were identified in in vivo samples obtained from the blood of the infected pigs. These were compared with in vitro samples by a Tandem Mass Tags (TMT) experiment...
December 13, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/29209222/pk-pd-analysis-of-marbofloxacin-against-streptococcus-suis-in-pigs
#7
Zhixin Lei, Qianying Liu, Bing Yang, Haseeb Khaliq, Jiyue Cao, Qigai He
Marbofloxacin is a fluoroquinolone antibiotic and highly effective treatment for respiratory diseases. Here we aimed to evaluate the ex vivo activity of marbofloxacin against Streptococcus suis in pig serum, as well as the optimal dosages scheme for avoiding the fluoroquinolone resistance development. A single dose of 8 mg/kg body weight (bw) was administrated orally to healthy pigs and serum samples were collected during the next 72 h. Serum marbofloxacin content was determined by high-performance liquid chromatography...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29203546/use-of-proteins-identified-through-a-functional-genomic-screen-to-develop-a-protein-subunit-vaccine-that-provides-significant-protection-against-virulent-streptococcus-suis-in-pigs
#8
Susan L Brockmeier, Crystal L Loving, Tracy L Nicholson, Jinhong Wang, Sarah E Peters, Lucy Weinert, Roy Chaudhuri, David J Seilly, Paul R Langford, Andrew Rycroft, Brendan W Wren, Duncan J Maskell, Alexander W Tucker
Streptococcus suis is a bacterium commonly carried in the respiratory tract that is also one of the most important invasive pathogens of swine, commonly causing meningitis, arthritis, and septicemia. Due to the existence of many serotypes and a wide range of immune evasion capabilities efficacious vaccines are not readily available. The selection of S. suis protein candidates for inclusion in a vaccine was accomplished by identifying fitness genes through a functional genomics screen and selecting conserved predicted surface-associated proteins...
December 4, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/29187841/genome-comparison-of-erythromycin-resistant-campylobacter-from-turkeys-identifies-hosts-and-pathways-for-horizontal-spread-of-erm-b-genes
#9
Diego Florez-Cuadrado, María Ugarte-Ruiz, Guillaume Meric, Alberto Quesada, M C Porrero, Ben Pascoe, Jose L Sáez-Llorente, Gema L Orozco, Lucas Domínguez, Samuel K Sheppard
Pathogens in the genus Campylobacter are the most common cause of food-borne bacterial gastro-enteritis. Campylobacteriosis, caused principally by Campylobacter jejuni and Campylobacter coli, is transmitted to humans by food of animal origin, especially poultry. As for many pathogens, antimicrobial resistance in Campylobacter is increasing at an alarming rate. Erythromycin prescription is the treatment of choice for clinical cases requiring antimicrobial therapy but this is compromised by mobility of the erythromycin resistance gene erm(B) between strains...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29184097/csl2-a-novel-chimeric-bacteriophage-lysin-to-fight-infections-caused-by-streptococcus-suis-an-emerging-zoonotic-pathogen
#10
Roberto Vázquez, Mirian Domenech, Manuel Iglesias-Bexiga, Margarita Menéndez, Pedro García
Streptococcus suis is a Gram-positive bacterium that infects humans and various animals, causing human mortality rates ranging from 5 to 20%, as well as important losses for the swine industry. In addition, there is no effective vaccine for S. suis and isolates with increasing antibiotic multiresistance are emerging worldwide. Facing this situation, wild type or engineered bacteriophage lysins constitute a promising alternative to conventional antibiotics. In this study, we have constructed a new chimeric lysin, Csl2, by fusing the catalytic domain of Cpl-7 lysozyme to the CW_7 repeats of LySMP lysin from an S...
November 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29159765/characteristic-comparison-of-meningitis-and-non-meningitis-of-streptococcus-suis-in-an-experimentally-infected-porcine-model
#11
Yingying Sun, Hongtao Liu, Rui Du, Shuguang Li, Guanggang Qu, Rining Zhu, Shuang Zhao, Jingmin Gu, Changjiang Sun, Xin Feng, Wenyu Han, Liancheng Lei
This study tested the differences of meningitis and non-meningitis of Streptococcus suis (SS). In this study, an infected pig model of streptococcal meningitis was established. Compared with the non-meningitis Streptococcus suis group (JZLQ001 group), the meningitis Streptococcus suis group (JZLQ022) exhibited neurological symptoms, such as ataxia and foaming at the mouth, and the brain showed a large area of congestion at 5 days post-infection (p.i.). Moreover, bacterial counts, white blood cells (WBCs), neutrophils, and blood glucose in the blood reached a peak and were significantly higher than those of the JZLQ001 group at 3 days p...
November 20, 2017: Inflammation
https://www.readbyqxmd.com/read/29148386/human-case-of-streptococcus-suis-disease-ontario-canada
#12
Jeisa Gomez-Torres, Asim Nimir, James Cluett, Anita Aggarwal, Sameer Elsayed, Deirdre Soares, Sarah Teatero, Yan Chen, Marcelo Gottschalk, Nahuel Fittipaldi
We report a case of Streptococcus suis human disease in Ontario, Canada, caused by a serotype 2 strain genotypically similar to those commonly isolated from pigs in North America. Initially, the isolate was misidentified as a viridans group Streptococcus. Human S. suis infections may be underdiagnosed in North America.
December 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29139136/tilmicosin-and-florfenicol-loaded-hydrogenated-castor-oil-solid-lipid-nanoparticles-to-pigs-combined-antibacterial-activities-and-pharmacokinetics
#13
Z Ling, L Yonghong, L Junfeng, Z Li, L Xianqiang
The combined antibacterial effects of tilmicosin (TIL) and florfenicol (FF) against Actinobacillus pleuropneumoniae (APP) (n = 2), Streptococcus suis (S. suis) (n = 2), and Haemophilus parasuis (HPS) (n = 2) were evaluated by chekerboard test and time-kill assays. The pharmacokinetics (PKs) of TIL- and FF-loaded hydrogenated castor oil (HCO)-solid lipid nanoparticles (SLN) were performed in healthy pigs. The results indicated that TIL and FF showed synergistic or additive antibacterial activities against APP, S...
November 15, 2017: Journal of Veterinary Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29122409/understanding-the-virulence-of-streptococcus-suis-a-veterinary-medical-and-economic-challenge
#14
REVIEW
B Haas, D Grenier
Streptococcus suis is a major swine pathogen worldwide and causes considerable economic losses in the swine industry. S. suis is also an emerging zoonotic agent, mainly in Asia. In pigs and humans, S. suis can cause septicemia, pneumonia, endocarditis, arthritis, and meningitis with irreversible sequelae. Identification and characterization of the virulence factors produced by S. suis are major advances in the understanding of the pathogenesis of S. suis infections and has therefore opened promising avenues for vaccine development against this pathogen...
November 6, 2017: Médecine et Maladies Infectieuses
https://www.readbyqxmd.com/read/29094420/rationally-designed-chemically-modified-glycodendrimer-ligand-analogues-inhibit-streptococcus-suis-adhesin-sadp-in-picomolar-concentrations
#15
Sauli Haataja, Priya Verma, Ou Fu, Anastassios Papageorgiou, Sakari Pöysti, Roland Pieters, Ulf Nilsson, Jukka Finne
Host cell surface carbohydrate receptors of bacterial adhesins are attractive targets in anti-adhesion therapy. The affinity of carbohydrate ligands with adhesins is usually found in a low µM range, which poses a problem for the design of effective inhibitors useful in therapy. In an attempt to increase the inhibitory power of carbohydrate ligands, we have combined the approach of chemical modification of ligands with their presentation as multivalent dendrimers in the design of an inhibitor of streptococcal adhesin SadP binding to its galactosyl-α1-4-galactose (galabiose) receptor...
November 2, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29033841/pharmacodynamic-evaluation-and-pk-pd-based-dose-prediction-of-tulathromycin-a-potential-new-indication-for-streptococcus-suis-infection
#16
Yu-Feng Zhou, Hui-Min Peng, Ming-Xiao Bu, Ya-Hong Liu, Jian Sun, Xiao-Ping Liao
Tulathromycin is the first member of the triamilide antimicrobial drugs that has been registered in more than 30 countries. The goal of this study is to provide a potential new indication of tulathromycin for Streptococcus suis infections. We investigated the pharmacokinetic and ex vivo pharmacodynamics of tulathromycin against experimental S. suis infection in piglets. Tulathromycin demonstrated a relatively long elimination half-life (74.1 h) and a mean residence time of 97.6 h after a single intramuscular administration...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29029051/multi-locus-sequence-typing-and-virulence-genotyping-of-streptococcus-suis-serotype-9-isolates-revealed-high-genetic-and-virulence-diversity
#17
Wenyang Dong, Yinchu Zhu, Ye Ma, Jiale Ma, Yue Zhang, Lvfeng Yuan, Zihao Pan, Zongfu Wu, Huochun Yao
Streptococcus suis (S. suis) is an important swine pathogen that can cause a variety of diseases. S. suis serotype 9 (SS9) is a prevalent serotype, but limited information is available. Here, we studied and compared 30 SS9 isolates, including 24 isolates from China between year 2004 and 2013, 5 isolates from Vietnam and a serotype reference isolate from Denmark. A MLST analysis was performed to exploit the genetic relationships between those isolates. The phylogenetic tree based on the MLST data divides those isolates into two clades (I and II), revealing different evolutionary paths of collected strains...
September 22, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/29026620/streptococcus-suis-serotype-9-endocarditis-and-subsequent-severe-meningitis-in-a-growing-pig-despite-specific-bactericidal-humoral-immunity
#18
Karoline Rieckmann, Kristin Müller, Annette Moter, Christoph G Baums, Anna Seydel
INTRODUCTION: . Meningitis and endocarditis are common pathologies of Streptococcussuis infections in pigs and humans. S. suis serotype 9 strains contribute substantially to health problems in European pig production, and immune prophylaxis against this serotype is very difficult. CASE PRESENTATION: . We report the clinical course and histopathological picture of a 10-week-old growing pig following experimental intravenous infection with S. suis serotype 9. The piglet showed rapid onset of severe clinical signs of meningitis 11 days post-intravenous challenge following prime-booster vaccination...
May 2017: JMM Case Reports
https://www.readbyqxmd.com/read/29024714/antibacterial-effect-and-bond-strength-of-a-modified-dental-adhesive-containing-the-peptide-nisin
#19
Meixuan Su, Shunyi Yao, Lisha Gu, Zihua Huang, Sui Mai
This study attempted to incorporate the antibacterial peptide nisin into an etch-and-rinse dental adhesive to evaluate the antibacterial activity of the modified adhesive against Streptococcus mutans and the bond strength. Single Bond 2 was used as a negative control, and nisin was incorporated at 1%, 3%, and 5% (w/v). The antibacterial activity against S. mutans was evaluated using the film contact test, the agar diffusion test, XTT assays and confocal laser scanning microscopy (CLSM). The microtensile bond strength (μTBS) of the modified dental adhesive was also evaluated...
October 9, 2017: Peptides
https://www.readbyqxmd.com/read/29022552/multiplex-pcr-for-identification-of-six-clinically-relevant-streptococci
#20
Rujirat Hatrongjit, Yukihiro Akeda, Shigeyuki Hamada, Marcelo Gottschalk, Anusak Kerdsin
PURPOSE: The aim of this study was to develop a multiplex PCR (mPCR) for simultaneous detection (single reaction) of six clinically relevant streptococcal species: Streptococcus pneumoniae, Streptococcus suis, Streptococcus gallolyticus subsp. gallolyticus, S. gallolyticus subsp. pasteurianus, Streptococcus intermedius and Streptococcus anginosus/constellatus. METHODS: mPCR with primers specific for S. pneumoniae (lytA), S. suis (recN), S. gallolyticus subsp. gallolyticus (tanB), S...
November 2017: Journal of Medical Microbiology
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