Publications

TitleAbstractYear
Filter
PMID
Filter
[food poisoning in a hospital with salmonella hadar (author's transl)]. 1979161372
salmonella hadar associated with pet ducklings--united states. 19921291011
identification of enteropathogens in infantile diarrhea in a study performed in the city of posadas, misiones, república argentina].the following work informs of the results of isolation, frequency and distribution of enteropathogens in children under five years old, without previous antibiotic treatment, less than seven days with diarrhoea, ambulatory or in hospital "dr. ramón madariaga" de posadas, misiones, república argentina, from june 1986 to may 1989. from a total of 972 children with diarrhoea, 78% required to be hospitalized. the greatest number of cases were found during spring and summer in children from 1 to 11 m ...19921345313
[clinical and epidemiological aspects of enteritis due to salmonella hadar. i. isolation of s. hadar from sporadic diarrhea--clinical and bacteriological study].before 1983, s. hadar was seldom isolated from man, animals, food or the environment in japan: only one strain having been isolated from man and one from the environment. in subsequent years there has been a progressive increase in the number of isolations. s. hadar is now one of the commonest serotypes isolated from cases of sporadic diarrhea in shizuoka prefecture (table 1). however, the epidemiology of s. hadar is not clearly understood. reports on the clinical features of s. hadar gastroente ...19921402059
[clinical and epidemiological aspects of enteritis due to salmonella hadar. ii. environmental contamination by salmonella hadar in shizuoka prefecture--studies on the feasibility of reducing s. hadar infection].a systematic examination was performed for environmental food contamination by salmonella in poultry farms, broiler chickens, broiler processing plants and meat on the market. salmonella was isolated from 219 of 1197 samples and the serotypes showed a wide distribution. (table 1-1). s. hadar accounted for 37.1% (96) of all isolations (259). the contamination rate of broiler chickens on arrival at broiler processing plants is relatively low. however, in the broiler processing plants, containers, ...19921402060
salmonella hadar associated with pet ducklings--connecticut, maryland, and pennsylvania, 1991.the association between salmonella and pets, particularly birds and reptiles, is well established (1-4). in the spring of 1991, a cluster of salmonella infections in connecticut, maryland, and pennsylvania was linked to pet ducklings. this outbreak underscores the need for careful handling of pets, especially ducklings during the spring and easter seasons.19921542292
from the centers for disease control. salmonella hadar associated with pet ducklings--connecticut, maryland, and pennsylvania, 1991. 19921552625
salmonella hadar phage type 10. 19911669866
interplay of microbe and major histocompatibility complex: a family study.we describe a 24-year-old man who developed reactive arthritis (rea) after a dysenteric illness caused by salmonella hadar. serologic tests suggested recent exposure of family members to salmonella. all members of the family were hla-b27 positive, but no other family member developed acute rea, although 2 of them had clinical evidence of previously existing b27 associated arthritis.19911787503
cure of salmonella hadar endovascular infection with medical therapy.endovascular infection due to salmonellae is an uncommon condition with an extremely poor prognosis. we describe a patient with endovascular infection due to salmonella hadar who was cured by prolonged medical treatment with third generation cephalosporin and fluoroquinolone antibiotics.19911953534
six enteropathogens isolated from a case of acute gastroenteritis.isolation of six different gastrointestinal pathogens (entamoeba histolytica, plesiomonas shigelloides, campylobacter jejuni and three different salmonella species [salmonella typhimurium, salmonella blockley and salmonella hadar]) in the feces of a german female tourist suffering from acute diarrhoea after a trip to bali.19902076911
phorbol myristate acetate inhibits hela 229 invasion by bordetella pertussis and other invasive bacterial pathogens.the microfilament inhibitors cytochalasins b and d have been traditionally used to indirectly evaluate the requirement for actin in the uptake of invasive bacterial pathogens by nonprofessional phagocytes. through their effects on microfilaments, both cytochalasins also impart profound alterations in cellular morphology and surface topology, which likely interfere with adherence. alterations affecting adherence would complicate interpretation of the effect of cytochalasins on entry alone. as an ...19902119340
isolation and characterization of salmonella from broiler carcasses or parts.a study was conducted to determine and characterize salmonella contamination on ready-to-cook broilers or parts in the columbus, oh, metropolitan area. ten to twelve samples per store were examined, using a whole-carcass rinse method. the salmonella cultures isolated were tested for resistance to a series of nine drugs and, subsequently, were sent to the national veterinary services laboratory at ames, ia for serotype identification. cultures identified as salmonella were also examined for the p ...19902356175
ciprofloxacin treatment of salmonella hadar epididymo-orchitis. 19883258861
phage-typing system for salmonella hadar of animal origin.a phage-typing system for salmonella hadar was developed. fifteen phages isolated from untreated sewage were used to phage-type 55 isolates of s. hadar recovered from avian and other animal species. twenty-four distinct phage types of s. hadar were established based on lysis patterns. methods involved in the isolation for bacteriophages for a particular serotype and the importance of bacteriophage typing is discussed in the context of the importance of s. hadar.19863729881
gentamicin and bacterial culture (nurmi culture) treatments either alone or in combination against experimental salmonella hadar infection in turkey poults.the effect of three treatments on salmonella hadar infection in turkey poults was examined. the three treatments were: (a) a single injection of gentamicin, (b) peroral treatment with anaerobic culture derived from cecal contents of an adult turkey (nurmi culture), and (c) combination of treatments a and b. nurmi culture was significantly more effective than gentamicin treatment. nurmi culture along with gentamicin reduced the number of shedding birds, but a higher proportion of birds became car ...19854074235
serological response of turkey hens to vaccination with salmonella hadar and its effect on their subsequently challenged embryos and poults.an inactivated salmonella hadar vaccine was administered to parent turkey stock and the progeny were subjected to challenge with s hadar. there was some evidence that eggs from vaccinated birds were more resistant to growth of the organism. when compared with similarly infected poults from unvaccinated parents, a markedly different serological picture and pattern of salmonella excretion was seen. it appeared that the passive immunity induced by the vaccine encouraged the faster establishment of ...19846463376
the isolation of salmonellae, newcastle disease virus and other infectious agents from quarantined imported birds in canada.necropsy and culture results are presented for 269 consignments of imported birds (mainly psittacine and passerine species) examined between january 1977 and august 1980. consignments were submitted for diagnosis of clinical illness or deaths occurring among these birds while they were in quarantine before entry into canada. enteritis and injury were the most frequent diagnoses. pathogens or potential pathogens were isolated from 77% of consignments. newcastle disease virus was isolated nine tim ...19817039785
food-poisoning caused by salmonella hadar. 19827178905
epidemic spread of salmonella hadar in england and wales.salmonella hadar is now the second commonest serotype isolated from cases of food poisoning in england and wales. turkeys are the main reservoir of the organism and there is an urgent need to eradicate it from the breeding stocks; though this would be expensive, the cost must be balanced against the cost of treating the human disease.19807190046
salmonella hadar peritonitis. 19807407484
a pseudo-outbreak of salmonellosis.during july 1991, a single laboratory reported an increased number of an unusual salmonella isolate. an outbreak control team was convened. a case was defined as an individual with diarrhoea from whose faecal sample salmonella hadar was isolated after 1 july 1991. by 30 july, 90 isolates had been identified and 57 persons interviewed including 39 primary cases. interviews failed to identify any common features among the cases. a review of the laboratory procedures revealed that the selenite enri ...19957641836
in vitro susceptibility to antimicrobial drugs of 62 salmonella strains isolated from horses in the netherlands.the in vitro activity of 17 antimicrobial drugs against strains of salmonella typhimurium (n = 52), salmonella thompson (n = 2), salmonella heidelberg (n = 3), salmonella hadar (n = 2), salmonella enteritidis (n = 1), salmonella infantis (n = 1) and salmonella derby (n = 1) was tested using the agar dilution method. the strains were isolated from horses admitted to the large animal clinics of utrecht university. the majority of strains were susceptible to gentamicin, amikacin, kanamycin, enroflo ...19957653025
nosocomial transmission of salmonella gastroenteritis to laundry workers in a nursing home.outbreaks of salmonella gastroenteritis in nursing homes are common. person-to-person transmission to nursing home personnel occurs occasionally, but infection of laundry staff as a result of handling soiled linen rarely has been reported.19948133005
[report of food poisoning by salmonella hadar in china].a food poisoning epidemic caused by salmonella hadar was confirmed by epidemiologic investigation and laboratory examination samonalle hadar had been detected in the specimens of food feces of patients. many epidemics of food poisoning caused by salmonall group of have been reported before, but that caused by the serogroup hadar hereby reported organisms is the first of its hind in china. attention should be paid by the public health authorities.19938243173
increasing ciprofloxacin resistance in salmonellas in england and wales 1991-1994.ciprofloxacin is now widely used as the drug of choice for those severe salmonella infections where antibiotic therapy is indicated. between 1991 and 1994 ciprofloxacin resistance in salmonellas isolated from humans in england and wales increased from 0.3% to 2.1%. among the most prevalent serotypes the highest incidence was seen in salmonella hadar where ciprofloxacin resistance has increased from 2.0% in 1991 to 39.6% in 1994. the incidence of ciprofloxacin resistance remains uncommon in other ...19968647778
conventional and molecular approaches to isolates of salmonella hadar from sporadic and epidemic cases.in september 1994 an outbreak of gastroenteritis occurred in 437 people who had consumed lunch in the canteen of a factory in central italy. salmonella sp. was isolated from stools of 99 patients and in 73 of them salmonella hadar was identified. this is the first outbreak caused by this serotype described in italy. in order to examine the genotypic basis of the epidemic strains, molecular typing was applied to sporadic strains isolated before and after the outbreak episode. for this purpose pha ...19979134723
an outbreak of salmonella hadar phage type 5 infection in london. 19979267070
an outbreak of salmonella hadar associated with food consumption at a building site canteen.a biphasic outbreak of gastroenteritis caused by salmonella hadar affected canteen employees and workers at a construction site in central italy in september 1994. there were 448 symptomatic cases, from 61 of whom group c salmonella was isolated. six cases were canteen employees. twenty-two other individuals were asymptomatic excreters. there were 10 secondary cases. working as a food handler at the canteen constituted an increased risk of infection, independently of ingestion of the food (odds ...19989517880
molecular typing of salmonella enterica subsp. enterica serovar hadar: evaluation and application of different typing methods.a highly discriminatory molecular typing system for isolates of salmonella enterica subsp. enterica (s.) serovar hadar was developed based on the data obtained from 34 epidemiologically unrelated s. hadar isolates from germany and brazil. plasmid profile analysis and macrorestriction analysis with the enzymes xbai, spei and blni represented the most discriminative typing methods. in contrast, ribotyping as performed with a gene probe that recognized the entire rrn operon did not reveal any diffe ...19989631533
serological and bacteriological observations on experimental infection with salmonella hadar in chickens.over the past 3 years the frequency of salmonella hadar infections has increased in belgium in both poultry and humans. therefore, the course of infection with s. hadar in poultry was investigated. one day-old and 4 week-old specific pathogen-free chickens were orally infected with one of two s. hadar strains, sh1 or sh2. mortality was 6% (sh1) and 17% (sh2) in birds infected at 1 day-old. chickens infected at 1 day-old with sh2 showed a mild diarrhoea. the s. hadar faecal excretion in birds inf ...19989646456
salmonella prevalence in crops of ontario and quebec broiler chickens at slaughter.swabs of crop contents of 635 broiler chickens were obtained from 9 ontario and 12 quebec processing plants and cultured for salmonella to determine prevalence in broiler crops. serotypes of positive cultures were determined to evaluate the serotype profile. the overall prevalence of contamination was low (4.3%). prevalence was higher in broilers sampled in quebec (5.8%) than in those sampled in ontario (2.2%). in quebec, there were differences in prevalence among the groups of broilers sampled ...19989776057
use of an autobioluminescent salmonella hadar to monitor the effects of acid and temperature treatments on cell survival and viability on lactic acid-treated poultry carcasses.to determine the long-term effects of a lactic acid rinse on viability and recovery of pathogens, salmonella hadar was isolated from poultry and bioluminescent constructs obtained by transformation with the lux (cdabe) gene cassette from photobacterium phosphoreum. results indicated that the transformed salmonella hadar lux was otherwise phenotypically similar to the wild-type strain. viability studies were performed by measuring luminescence following lactic acid treatment of turkey breast and ...19989829182
[spontaneous bacteremia due to salmonella hadar in liver cirrhosis with transjugular intrahepatic portosystemic shunt].bacteriemia is a frequent infection in patients with hepatic cirrhosis, which is associated with a high mortality. spontaneous bacteriemia is generally caused by gramnegative bacilli. we present an episode of salmonella hadar's spontaneous bacteriemia in a patient with cirrhosis of the liver and transjugular intrahepatic portosystemic shunt. the role of the prosthesis in the pathogenesis of bacteriemia in hepatic cirrhosis is discussed.199910193091
evaluation of phenotypic and genotypic markers for characterisation of the emerging gastroenteritis pathogen salmonella hadar.over the last 4 years salmonella hadar has increasingly been isolated in europe in conjunction with food-borne gastroenteritis. the aim of this study was to evaluate epidemiological methods (phage typing, antimicrobial susceptibility testing, dna plasmid analysis, ribotyping and pulsed-field gel electrophoresis analysis) for characterising salmonella hadar isolates. the 100% phage typeability of isolates and the high discriminatory index of 0.8856 suggest that phage typing is the method of choic ...200010834816
survival of salmonella hadar after washing disinfection of minimally processed spinach.washing disinfection with chlorine is widely used to reduce the initial microbiological load during the preparation of minimally processed vegetables. the effects of initial concentration of chlorine, time and the liquid volume:produce weight ratio on the reduction of salmonella counts on inoculated spinach were evaluated using response surface methodology. initial chlorine concentration, time and the interaction between them had a significant effect on reduction of salmonella populations. howev ...200010972717
an outbreak of salmonella hadar associated with roast rabbit in a restaurant.in august 1997, an outbreak of gastroenteritis from salmonella hadar phage type 2 occurred among customers of a restaurant in rimini (emilia-romagna region, italy). twenty-nine people who had eaten food prepared in the restaurant on 2 or 3 august had symptoms of acute gastroenteritis. the infection was culture-confirmed in 24 cases and the stool specimens of four healthy people were positive for salmonella hadar. twelve people had to be hospitalized and a 3-year old girl died. the case-control s ...200011078117
antibiotic resistance in salmonellae isolated from humans and animals in france: comparative data from 1994 and 1997.among 25526 recorded isolates of salmonellae, 5086 isolated from humans and 20440 from animals in 1994 and 1997 in france, the antibiotic resistance phenotype was determined for all human and 5336 animal isolates. in salmonella enterica serovar typhimurium, one of the two most frequently isolated serovars from humans as well as animals, resistance to ampicillin was observed in 61% of both human and animal isolates in 1994 and in 73% of human and 53% of animal isolates in 1997. during these perio ...200011102416
[drug sensitivity, conjugative r plasmids and plasmid profiles of salmonella isolated from humans with infectious enteritis].using 92 salmonella strains isolated from patients suspected of having infectious diseases of the intestinal tract who visited 13 hospitals in japan during the six years between 1991 and 1996, we investigated the drug susceptibility, prevalence of conjugative r plasmid, and the plasmid profiles. 1) of the bacterial isolates tested, 52.2% showed drug-resistance. regarding the drug-resistance patterns, 70.8% of the isolates were resistant to a single drug, while 29.2% were multi drug-resistant. 2) ...200011109763
prevalence and dissemination of salmonella serotypes along the slaughtering process in brazilian small poultry slaughterhouses.salmonella is the leading cause of human foodborne infections in latin america, and poultry meat is one of the main vehicles. small poultry slaughterhouses (fewer than 200 birds slaughtered per day) represent an important economic activity in certain regions. the slaughtering process in these abattoirs is manual and rudimentary, and frequently the hygienic conditions are poor. this study reports results of a detailed evaluation of the prevalence of salmonella serotypes in carcasses, utensils, an ...200011131902
antimicrobial resistance in salmonellae from humans, food and animals in spain in 1998.we studied 1710 salmonella: spp. isolates from human (1051), food (421) and animal (238) sources. they were tested by the disc diffusion method for susceptibility to 12 different antimicrobial agents. the incidence of resistance and multiple resistance (mr) among the salmonella strains of different origins, the relationship between their most frequent serotypes and phage types (pts) and their antimicrobial resistance patterns were determined. in general, the incidence of resistance and mr was si ...200111222564
differences among six salmonella serovars in abilities to colonize reproductive organs and to contaminate eggs in laying hens.the abilities of salmonella serovars to colonize the reproductive organs of chickens and to contaminate eggs were compared. mature laying hens were inoculated intravenously with 10(5) colony-forming units of salmonella enteritidis, salmonella typhimurium, salmonella infantis, salmonella hadar, salmonella heidelberg, or salmonella montevideo to cause the systemic infection. salmonella enteritidis was recovered from three yolks of the laid eggs (7.0%), suggesting egg contamination from the transov ...200111332500
pathogenicity of different serogroups of avian salmonellae in specific-pathogen-free chickens.the pathogenicity of one isolate of salmonella typhimurium, four isolates of salmonella heidelberg, three isolates of salmonella kentucky, two isolates of salmonella montevideo, one isolate of salmonella hadar, and two isolates of salmonella enteritidis (se), one belonging to phage type (pt)13a and the other to pt34, was investigated in specific-pathogen-free chicks. three hundred eighty-four chicks were separated into 16 equal groups of 24 chicks. thirteen groups were inoculated individually wi ...200111785896
differences in abilities to colonize reproductive organs and to contaminate eggs in intravaginally inoculated hens and in vitro adherences to vaginal explants between salmonella enteritidis and other salmonella serovars.in experiment 1, mature laying hens were inoculated intravaginally with 10(6) colony-forming units of salmonella enterica serovar enteritidis (s. enteritidis), salmonella typhimurium, salmonella infantis, salmonella hadar, salmonella heidelberg, or salmonella montevideo to compare their abilities to colonize the reproductive organs of chickens and to contaminate eggs. salmonella enteritidis was more frequently recovered (from 11 of 40 eggs, 27.5%) than the other serovars, and especially the inne ...200111785900
occurrence of salmonella enterica serotype typhimurium dt104a in retail ground beef.surveillance data of cattle and human isolates of salmonella enterica serovar typhimurium dt104 indicate that this pathogen emerged worldwide in the 1980s, particularly in cattle. studies were conducted to determine the prevalence of salmonella typhimurium dt104 in ground beef. samples were also tested for the presence of generic escherichia coli. a total of 404 fresh ground beef samples obtained at retail stores from new york, san francisco, philadelphia, denver, atlanta, houston, and chicago w ...200211848574
antimicrobial drug resistance in salmonella: problems and perspectives in food- and water-borne infections.strains of salmonella spp. with resistance to antimicrobial drugs are now widespread in both developed and developing countries. in developed countries it is now increasingly accepted that for the most part such strains are zoonotic in origin and acquire their resistance in the food-animal host before onward transmission to humans through the food chain. of particular importance since the early 1990s has been a multiresistant strain of salmonella typhimurium definitive phage type (dt) 104, displ ...200212069879
salmonella serotypes isolated from nonhuman sources in são paulo, brazil, from 1996 through 2000.a total of 4,581 salmonella strains isolated from nonhuman sources, including foodstuffs associated with foodborne salmonella outbreaks, from january 1996 through december 2000 were serotyped at the enteropathogens laboratory, instituto adolfo lutz, são paulo, brazil. among the 123 different serotypes identified, salmonella enterica subsp. enterica serotype enteritidis (salmonella enteritidis) was the most prevalent (32.7%), ranking first for almost every kind of source. the next most common ser ...200212092719
quantitative comparison of intestinal invasion of zoonotic serotypes of salmonella enterica in poultry.the aim of the present study was to compare the invasion of selected zoonotic salmonella serotypes of poultry in an in vivo chicken intestinal loop model and also in vitro in epithelial cell cultures. invasion was measured relative to a reference strain, salmonella typhimurium 4/74 invh201::tnphoa. two serotypes demonstrated intracellular log(10) counts that differed significantly from all other serotypes tested: salmonella enteritidis pt4 being 1.5 log(10) colony forming units (cfu) (31-fold) h ...200212425791
topoisomerase iv mutations in quinolone-resistant salmonellae selected in vitro.the development of high-level fluoroquinolone resistance has rarely been observed in salmonellae and, in contrast to other gram-negative bacteria mutations affecting topoisomerase iv, a known secondary target of quinolones in escherichia coli has not been described except for one recent report. the present study used quinolone-susceptible field isolates representing epidemiologically relevant serovars and phage types salmonella hadar and salmonella typhimurium dt104 and dt204c to select fluoroqu ...200312705680
a new salmonella type (salmonella hadar). 195413171013
eradication of multiresistant salmonella hadar convalescent-phase carriage with azithromycin. 200314616738
incidence of quinolone resistance in strains of salmonella isolated from poultry, cattle and pigs in germany between 1998 and 2001.this paper reports the susceptibility to the quinolone nalidixic acid and the fluoroquinolone ciprofloxacin of 14,514 strains of salmonella isolated in germany from poultry, cattle and pigs between 1998 and 2001. quinolone-resistant salmonellae were most frequently isolated from poultry, with a prevalence of 10.2 to 16.8 per cent. poultry-associated serotypes, such as salmonella paratyphi b (d-tartrate positive), salmonella hadar and salmonella virchow, had the highest prevalence of quinolone re ...200314667084
studies to determine the critical control points in pork slaughter hazard analysis and critical control point systems.aerobic mesophilic counts (amc), coliform (cc) and coliform resuscitation counts (crcs) were obtained by swabbing 50 cm(2) areas at three sites (ham, belly and neck) on pig carcasses, after each of seven stages of the slaughter/dressing process (bleeding, scalding, dehairing, singeing, polishing, evisceration and chilling). in most cases, there were no statistical differences (p>0.05) among the counts derived by these three methods. reductions in counts at individual sites were observed after sc ...200414751688
geographically dependent distribution of gyra gene mutations at codons 83 and 87 in salmonella hadar, and a novel codon 81 gly to his mutation in salmonella enteritidis.in all, 90 nalidixic acid-resistant clinical strains of salmonella hadar and salmonella enteritidis isolated in norway but of predominantly foreign origin were subjected to sequencing of the gyra, gyrb, parc and pare genes. all the isolates contained at least one mutation in gyra codon 83 or codon 87. a highly significant correlation between mutations in gyra codon 83 and strains originating from southeast asia was found in s. hadar but not in s. enteritidis. a novel gyra codon 81 gly to his mut ...200415153158
comparison of different attenuation strategies in development of a salmonella hadar vaccine.the purpose of this work was to develop a live, attenuated vaccine strain to protect chickens against colonization by group c salmonella. we constructed two candidate vaccines: a deltacya deltacrp derivative and a deltaphop derivative of salmonella hadar. white leghorn chickens were vaccinated at day of age and at 2 wk with one of the two strains. a nonvaccinated group served as a control. at 4 wk of age, all birds were challenged with wild-type s. hadar and necropsied 6 days later. numbers of s ...200415529966
trends in nalidixic acid resistance in nontyphoidal salmonella isolated from 1999 to 2002: decreased susceptibility to 6 fluoroquinolones.we determined the resistance to nalidixic acid and 6 fluoroquinolones of 771 nontyphoidal salmonella strains isolated from humans between 1999 and 2002. a total of 22 different serotypes were identified among the salmonella isolates, the most common being salmonella enteritidis (79%) and salmonella derby (8%). resistance to nalidixic acid increased from 38% in 1999 to 43% in 2002. this resistance was not homogeneous among the different serotypes, with the highest percentage of resistant isolates ...200515893900
risk factors associated with salmonella enterica subsp. enterica contamination of chicken carcases in senegal.this study was to identify the risk factors for salmonella spp. contamination of senegalese chicken carcases during slaughtering. one hundred and twenty traditional slaughterhouses were studied from january 2000 to december 2002 in and around dakar. a questionnaire was answered by the slaughterers, and samples of breast skin were taken to assess the salmonella status of chicken carcases. results showed that 43.3% of the batches were contaminated with salmonella, indicating salmonella hadar and s ...200515957441
development of a pcr system for the characterisation of salmonella flagellin genes.analysis of flagellin genes was carried out on strains of salmonella typhimurium, salmonella hadar, salmonella abortusequi, salmonella enteritidis and salmonella gallinarum serovars, using a pcr system designed in this study. the purpose of these studies was to explore the flagellin genes of biphasic and monophasic salmonellae for future targeted genetic interventions. the pcr primers were designed for two different structural genes of flagellin (flic, fljb), for the repressor of flic (flja), fo ...200515959975
faecal excretion of salmonella hadar from calves grazed on pastures fertilised with s. hadar-contaminated broiler litter.the risk of salmonella hadar infection in weaned calves grazed on pasture artificially contaminated with the organism via broiler litter applied at commercial dressing rates was assessed. a group of four calves was grazed on artificially contaminated pasture and a control group was grazed on an adjacent identical paddock. a ninth calf was given s. hadar together with an anthelmintic drench, and a tenth was fed on a mixture of contaminated broiler litter and hay for 36 hours. rectal swabs were co ...199316031721
risk factors associated with salmonella enterica subsp. enterica contamination of chicken carcases in senegal.the objective of this study was to identify the risk factors for salmonella spp. contamination of senegalese chicken carcases during slaughtering. one hundred and twenty traditional slaughterhouses were studied from january 2000 to december 2002 in and around dakar. a questionnaire was administered to the slaughterers and samples of breast skin were taken to assess the salmonella spp. status of chicken carcases. results showed that 43.3% of the chicken batches were contaminated with salmonella s ...200516050182
risk factors for contamination of ready-to-eat street-vended poultry dishes in dakar, senegal.our objective was to investigate the salmonella and campylobacter contamination of traditional ready-to-eat street-vended poultry dishes and to assess the association of some restaurant characteristics and cooking practices with the contamination of these meals. one hundred and forty-eight street-restaurants were studied from january 2003 to april 2004 in dakar. a questionnaire was submitted to the managers, and samples of ready-to-eat poultry dishes were taken. salmonella spp. was isolated in 2 ...200516083818
epidemiological analysis of salmonella enterica ssp. enterica serovars hadar, brancaster and enteritidis from humans and broiler chickens in senegal using pulsed-field gel electrophoresis and antibiotic susceptibility.salmonella hadar, salmonella brancaster and salmonella enteritidis are the main salmonella enterica ssp. enterica serovars isolated from poultry in senegal. our objective was to analyse the pulsed-field gel electrophoresis (pfge) and antibioresistance patterns of strains belonging to these serovars and to assess the significance of broiler-chicken meat as a source of human infection.200516162250
trends in antimicrobial resistance phenotypes in non-typhoid salmonellae from human and poultry origins in france.a total of 1873 strains from human origin and 4283 strains from non-human origin of salmonella enterica serotypes typhimurium, enteritidis, heidelberg, hadar and virchow, collected over three years 1993, 1997 and 2000, were examined in order to determine the rate of antimicrobial resistance to 12 antimicrobial drugs. the objective of the study was to describe and to compare the evolution of the main resistance types in human and non-human isolates, focusing on the poultry sector. the evolution a ...200616409665
the distribution of salmonella serovars in chicken and humans in lithuania.we studied serovars of salmonella strains isolated from chicken and humans in lithuania over the period from 2000 to 2004. salmonella strains were isolated and identified according to the techniques recommended by international organisation for standardization (microbiology of food and animal feeding stuff--horizontal method for the detection of salmonella, 1998, iso, geneva). the per cent of infected flocks with salmonella in separate years was between 1.01% and 3.2% during the period of invest ...200616411901
acute interstitial nephritis associated with salmonellosis.acute interstitial nephritis (ain) is a common cause of acute renal failure. we report a case of ain, confirmed by renal biopsy, that developed in a patient with typhoid fever due to a salmonella hadar infection. ain secondary to salmonella infection is a rare complication that has only been described twice in the literature. salmonella should be added to the list of possible causes of ain.200616618461
antimicrobial resistance in non-typhoidal salmonella from human sources, spain, 2001-2003.to determine the current state of antimicrobial resistance among non-typhoidal salmonella strains isolated from humans in spain.200616735424
e-alert 9 august: over 2000 cases so far in salmonella hadar outbreak in spain associated with consumption of pre-cooked chicken, july-august, 2005. 200516785679
prevalence of qnr genes in salmonella in france.to detect the qnra, qnrb and qnrs genes among salmonella isolates received at the french national reference centre for salmonella in paris, france.200717307773
multiple typing for the epidemiological study of the contamination of broilers with salmonella from the hatchery to the slaughterhouse.eighteen belgian broiler flocks were followed from the hatchery to the slaughterhouse by a multiple typing approach (sero-, geno-, and phage types) for the investigation of the transmission of salmonella and its subtypes. for 12 of the 18 flocks, there was no correlation between the serotypes found preharvest and those isolated from the feces in the transport crates and on the carcasses in the slaughterhouse. serotypes found in the crates were usually also found on the carcasses. in 5 of the 10 ...200717340865
alberta. placentitis due to salmonella hadar. 198817423053
salmonella hadar pericarditis. 199317588001
predictive models for reduction of salmonella hadar on chicken skin during single and double sequential spraying treatments with acetic acid.the response surface methodology was used to evaluate the effect of acetic acid concentration, spraying time and temperature on the reduction of salmonella hadar on poultry skin in a laboratory spraying process, and to identify the best conditions required to develop this operation.200717714385
survey of the prevalence of salmonella species on commercial laying farms in the united kingdom.a survey of salmonella infection on 454 commercial layer flock holdings in the uk was carried out between october 2004 and september 2005. fifty-four (11.7 per cent, 95 per cent confidence interval 9.3 to 14.0 per cent) were salmonella positive. the most common serovar identified was salmonella enteritidis at a prevalence of 5.8 per cent, and 70 per cent of these isolates were phage types 4, 6, 7 and 35. salmonella typhimurium was the second most prevalent serovar, found in 1.8 per cent of the f ...200717921438
persistence and growth of different salmonella serovars on pre- and postharvest tomatoes.the interaction of a range of salmonella serovars with pre- and postharvest tomatoes was evaluated. serovars were selected on the basis of previous association in tomato-linked outbreaks of salmonellosis (salmonella javiana, salmonella montevideo, and salmonella newport) or those typically isolated from animal or clinical infections (salmonella dublin, salmonella enteritidis, salmonella hadar, salmonella infantis, salmonella typhimurium, and salmonella senftenberg). salmonella serovars introduce ...200718095423
contamination of salmonella spp. in a pig finishing herd, from the arrival of the animals to the slaughterhouse.the aim of the present study was to investigate the contamination sources and the transmission of salmonella within a pig finishing herd in italy. nine sets of samples were collected during the fattening period from cleaned and disinfected pens, animals at different ages (4 days after arrival, 90, 150, 170 and 240 days of age) and at slaughter. salmonella was isolated from cleaned pens, individual faecal samples, the truck used to transport the pigs to the abattoir and after slaughter (cecal con ...200818230403
a comparative study on the pathogenesis of egg contamination by different serotypes of salmonella.salmonella enterica serotype enteritidis is the predominant serotype associated with egg-borne salmonellosis in humans. apparently this serotype possesses particular characteristics that increase its chance to contaminate eggs. to identify these characteristics, two salmonella serotype enteritidis strains as well as one strain of each of the serotypes salmonella typhimurium, salmonella heidelberg, salmonella virchow and salmonella hadar strain were used to examine different aspects related to eg ...200818622856
an enhanced discriminatory pulsed-field gel electrophoresis scheme for subtyping salmonella serotypes heidelberg, kentucky, saintpaul, and hadar.conventional pulsed-field gel electrophoresis (pfge) protocols, used extensively as a successful approach for subtyping many salmonellae, may be inadequate for discriminating strains sharing levels of homogeneity within the same serotype. four additional restriction enzymes (spei, paci, sfii, and noti), in addition to xbai and blni, were used in pfge typing of 33 salmonella heidelberg, 27 salmonella kentucky, 27 salmonella saintpaul, and 27 salmonella hadar isolates that were recovered from poul ...200818939754
role of global regulator rma for multidrug efflux-mediated fluoroquinolone resistance in salmonella.the genetic basis for multidrug resistance (mdr) due to overexpression of mdr efflux pumps in escherichia coli usually includes alterations in genes encoding global regulators, like mara, soxs, and rob. in salmonella, in addition to these regulators, rma, for which no homolog exists in e. coli, seems to play a role in the regulation of efflux pumps. however, the exact mechanisms remain unclear. therefore, this study aimed at investigating the influence of the regulator rma on the expression of m ...200819018673
survey of the prevalence of salmonella on commercial broiler farms in the united kingdom, 2005/06.between october 2005 and september 2006, all european union member states were required to carry out standardised surveys of the prevalence of salmonella in broiler flock holdings to establish baseline data from which to derive national targets for disease reduction. in the uk 382 holdings were sampled, 41 of which were positive for salmonella, giving an estimated weighted prevalence of 10.7 per cent (95 per cent confidence interval [ci] 8.1 to 13.1 per cent). the serotype most frequently isolat ...200819043089
effects of static magnetic field on cell growth, viability, and differential gene expression in salmonella.in the present study, we investigated the effect of exposure to a static magnetic field (smf) on cell growth, viability, and gene expression of salmonella enterica subsp. enterica serovar hadar. our results indicated that smf exposure (200 mt, 13 hours) failed to alter cellular growth but induced a decrease of colony-forming units (cfu) between 3 and 6 hours followed by an increase from 6 to 9 hours. the analysis of the differential expression of rpoa, dnak, katn, and 16s rrna genes under smf ex ...200919422305
salmonella detection in feces during broiler rearing and after live transport to the slaughterhouse.eggs and poultry meat are a common source of human salmonellosis. contamination of poultry or poultry meat may occur throughout the production chain. nevertheless, in spain, noncontaminated broiler meat may be sold for human consumption from 2011. the aims of this study were as follows: (i) assess salmonella detection from feces samples during the rearing and (ii) assess the influence of live transport to the slaughterhouse on salmonella detection. during this study, 65 flocks were sampled at we ...200919687287
molecular investigation of salmonella choleraesuis and salmonella hadar strains isolated from humans in turkey.eleven salmonella choleraesuis and seven salmonella hadar strains isolated from various clinical humand samples were investigated by plasmid profile analysis, enterobacterial repetitive intergenic consensus-polymerase chain reaction (eric-pcr) and pulsed-field gel electrophoresis (pfge) in order to obtain information at a molecular level on the epidemiology of s. choleraesuis and s. hadar, which are significantly present in turkey. plasmid profile analysis showed that 10 (90.9%) of 11 s. cholera ...200919762985
emergence of extended-spectrum beta-lactamases and ampc-type beta-lactamases in human salmonella isolated in spain from 2001 to 2005.to study the resistance to third-generation cephalosporins in salmonella strains isolated from humans in a 5 year period in spain, and to identify the responsible genes and their dissemination.200919815633
evaluation of associations between feed withdrawal and other management factors with salmonella contamination of broiler chickens at slaughter in alberta.salmonellosis is one of the most common bacterial foodborne diseases of public health concern in industrialized countries. poultry products are considered an important source of salmonella-related foodborne disease in humans. this study was undertaken to evaluate the relationship between various management factors including feed withdrawal and transportation time with salmonella contamination in crops, ceca, and carcasses of broiler chickens at slaughter in alberta. using a two-stage sampling pr ...200919833047
serotype identification and antimicrobial resistance profiles of salmonella spp. isolated from chicken carcasses.in this study, 32 salmonella strains isolated from 400 chicken carcasses were serotyped, and antibiotic resistance profiles were detected against 12 selected antimicrobial agents using disc diffusion method. thirty-two isolates were identified as follows; 22 (68.7%) salmonella enteritidis, five (15.6%) salmonella virchow, three (9.3%) salmonella typhimurium and two (6.2%) salmonella hadar. in all salmonella isolates, antibiotic resistance were detected. out of 32 salmonella strains, 22 (68.75%) ...201019946796
investigation of an outbreak of salmonella enterica subsp. enterica serovar hadar food illness in the abruzzi region of italy.a comparative study was made of 22 strains of salmonella hadar isolated from victims of an outbreak of food illness in the abruzzi region of italy in 2000 and 21 strains of the same serotype isolated from poultry meat and human stool samples in the abruzzi and molise regions between 2000 and 2001. the aim of the investigation was to provide an epidemiological interpretation of the food illness outbreak to establish the degree of similarity between the s. hadar strains isolated from victims of th ...200820405442
reactive arthritis and other musculoskeletal sequelae following an outbreak of salmonella hadar in castellon, spain.in 2005 a large outbreak of salmonella hadar occurred in spain following the consumption of commercial precooked roast chicken. we estimated the incidence and risk factors for reactive arthritis (rea) and other musculoskeletal sequelae in the patients of this outbreak in 2 health departments of castellon province.201020551098
multiple contaminations of chickens with campylobacter, escherichia coli and salmonella in yaounde (cameroon).food-borne diseases associated with campylobacter, escherichia coli, and salmonella are mainly caused by the consumption of raw or undercooked poultry meat. the objective of this study was to evaluate the prevalence of campylobacter, escherichia coli, and salmonella in chickens.201021045373
nationwide survey of salmonella prevalence in environmental dust from layer farms in japan.a nationwide survey was conducted to determine salmonella prevalence in airborne dust from layer farms. of the 4,090 layer farms in japan, 203 were surveyed and 48 (23.6%) of these were positive for salmonella. salmonella isolation rates were higher in the eastern (24.3%), central (25.6%), western (23.9%), and southern (27.5%) prefectures than they were in the northern (13.3%) prefecture. we recovered 380 salmonella isolates and identified 34 different salmonella serovars. salmonella infantis wa ...201021219710
[epidemiological characteristics of salmonellosis in new zagreb during the 1990-2009 period].in croatia, salmonellosis is the leading cause of bacterial foodborne diseases. the aim of the study was to determine the incidence of the disease, patient breakdown by age and sex, the most frequently isolated salmonella serotypes, the length of carriership, and the most frequent source of infection. it was a retrospective analysis, and the sources of data were reports and epidemiological questionnaires administered to those affected with the disease. during the 1990-2009 period, 4492 cases of ...201121568073
comprehensive analysis of salmonella sequence polymorphisms and development of a ldr-ua assay for the detection and characterization of selected serotypes.salmonella is a major cause of food-borne disease, and salmonella enterica subspecies i includes the most clinically relevant serotypes. salmonella serotype determination is important for the disease etiology assessment and contamination source tracking. this task will be facilitated by the disclosure of salmonella serotype sequence polymorphisms, here annotated in seven genes (sefa, safa, safc, biga, inva, fima, and phsb) from 139 s. enterica strains, of which 109 belonging to 44 serotypes of s ...201121611799
the relationship between the numbers of salmonella enteritidis, salmonella heidelberg, or salmonella hadar colonizing reproductive tissues of experimentally infected laying hens and deposition inside eggs.contamination of eggs by salmonella enteritidis has been a prominent cause of human illness for several decades and is the focus of a recently implemented national regulatory plan for egg-producing flocks in the united states. salmonella heidelberg has also been identified as an egg-transmitted pathogen. the deposition of salmonella strains inside eggs is a consequence of reproductive tract colonization in infected laying hens, but prior research has not determined the relationship between the n ...201121793440
microencapsulated sorbic acid and nature-identical compounds reduced salmonella hadar and salmonella enteritidis colonization in experimentally infected chickens.the reduction of salmonella prevalence in broilers is a priority in european union agricultural policies because treatment with antibiotics is forbidden by regulation (ec) 2160/2003. two trials were conducted to evaluate the efficacy of a microencapsulated blend of sorbic acid and nature-identical compounds (i.e., chemically synthesized botanicals; sab) on the reduction of the cecal prevalence and contents of salmonella enterica serovars hadar and enteritidis in experimentally infected chickens. ...201121753203
detection of a novel qnrb19-carrying plasmid variant mediating decreased fluoroquinolone susceptibility in salmonella enterica serovar hadar.thirty salmonella enterica subsp. enterica serovar hadar isolates of avian origin collected between 2007 and 2010 from chicken carcasses in five geographically spread abattoirs in germany were investigated for plasmid-mediated quinolone resistance determinants. four isolates were identified by pcr analysis and hybridization experiments to carry qnrb genes. the isolates were indistinguishable by their xbai macrorestriction patterns and did not exhibit a mutation in the quinolone resistance-determ ...201727404660
unraveling the effects of static magnetic field stress on cytosolic proteins of salmonella by using a proteomic approach.the present study investigated the adaptation of salmonella enterica subsp. enterica serovar hadar to static magnetic field (smf) exposure (200 mt, 9 h). the proteomic analysis provides an overview of potentially important cytosolic proteins that salmonella needs to regulate to survive and adapt to magnetic stress. via 2-dimensional electrophoresis and liquid chromatography tandem mass spectrometry, we compared cytosolic proteomes before and after exposure to magnetic field. a total of 35 protei ...201626928316
attribution of salmonella enterica serotype hadar infections using antimicrobial resistance data from two points in the food supply system.a challenge to the development of foodborne illness prevention measures is determining the sources of enteric illness. microbial subtyping source-attribution models attribute illnesses to various sources, requiring data characterizing bacterial isolate subtypes collected from human and food sources. we evaluated the use of antimicrobial resistance data on isolates of salmonella enterica serotype hadar, collected from ill humans, food animals, and from retail meats, in two microbial subtyping att ...201626838291
phenotypic and molecular characterization of multidrug-resistant salmonella enterica serovar hadar in greece, from 2007 to 2010.all 120 strains of salmonella enterica serovar hadar isolated during 2007-2010 in greece were characterized by phenotypic and molecular methods. high rates of resistance to nalidixic acid (92%) and low levels of ciprofloxacin resistance (88%) were observed. pulsenet-pulsed field gel electrophoresis profile shadxb.0001 was predominant in greece (58%) as in europe but pt1, a rare phage type in europe, was frequent in greece (56%). the shadxb.0001 and pt1 clone (38%) were found in humans, animals a ...201525658552
antimicrobial resistance patterns and genotypes of salmonella enterica serovar hadar strains associated with human infections in switzerland, 2005-2010.salmonella hadar ranks in the top ten serovars reported from humans in switzerland. in this study, all 64 s. hadar strains isolated from different patients from 2005 to 2010 in switzerland were characterized by (i) assessing phenotypic antimicrobial resistance profiles using the disk diffusion method and (ii) by genotyping using pulsed-field gel electrophoresis (pfge) in order to evaluate the relationship of the strains. the annual incidences varied between 0.32/100,000 in 2005 (highest incidenc ...201423591052
the first attempt of an active integrated laboratory-based salmonella surveillance programme in the north-eastern region of nigeria.to identify the sources of salmonella contamination, distribution, prevalence and antimicrobial susceptibility patterns, which have significant impact on public and animal health, and international trade.201323848364
prevalence, seasonal occurrence, and antimicrobial resistance of salmonella spp. isolates recovered from chicken carcasses sampled at major poultry processing plants of south korea.the current study was conducted to assess salmonella spp. contamination in chicken carcasses produced at major poultry processing plants in south korea. in total, 120 chicken carcasses were collected through 12 individual trials (10 chickens per trial) from six poultry processing plants in the summer of 2014 and the winter of 2015. eighteen chicken samples (15%) were contaminated with salmonella, with a higher rate of contamination observed during summer (14 isolates, 11.7%) than during winter ( ...201627442349
Displaying items 1 - 100 of 105