Publications

identification of ctx-2, a novel cefotaximase from a salmonella mbandaka isolate.	a strain of salmonella mbandaka isolated from the feces of an algerian infant showed a reduced susceptibility to cefotaxime (mic, 8 mg/liter). this strain produced two transferable beta-lactamases of pis 5.3 and 5.6. the novel beta-lactamase with a pi of 5.3 inhibited by clavulanic acid showed cefotaxime hydrolysis and was therefore designated ctx-2.	1991	1929316
salmonella mbandaka isolated in italy. 1979-1986.	a total of 350 strains of salmonella mbandaka were isolated in italy during the period 1979 to 1986. s. mbandaka was a rare serotype in italy. it was first isolated from water in 1979. since that year the number of isolates has increased: 1980 (3), 1981 (21), 1982 (21), 1983 (24), 1984 (54), 1985 (108), 1986 (118). 67.1% of the strains were isolated from humans, 14.6% from food, 15.1% from water and 2.9% from animals. frozen eggs and egg-based products were the most frequently contaminated foods ...	1989	2716535
a molecular study of salmonella strains identified from two food-poisoning outbreaks.	a molecular epidemiology study was carried out on salmonella mbandaka and salmonella corvallis strains identified from two food-poisoning outbreaks which occurred in august 1985 in pistoia and in october 1985 in sant'ilario d'enza (re). all the salmonella mbandaka strains were plasmid-free; all the epidemic salmonella corvallis strains, in contrast to the non epidemic isolates, carried a small plasmid of approximately 2 mda molecular weight. restriction enzyme cleavage pattern analysis revealed ...	1987	3041182
the pathogenicity of salmonella mbandaka in specific pathogen free rabbits.	salmonella mbandaka was isolated from the lungs of three rabbits that developed a peracute disease and died three to eight weeks following extensive experimental manipulation. to examine the pathogenicity of this rare serotype, clinically normal, s. mbandaka-carrier rabbits were subjected to either corticosteroid immunosuppression alone or corticosteroid immunosuppression with a minor surgical procedure. acute or peracute salmonellosis developed in one of two rabbits immunosuppressed only, and i ...	1984	6240572
laboratory rabbits as reservoirs of salmonella mbandaka.		1983	6827156
transmission of salmonella mbandaka to cattle from contaminated feed.	salmonella mbandaka was isolated from cattle on three dairy farms. the duration of infection was less than four weeks and none of the animals became clinically ill. the animals had all consumed a diet containing a vegetable fat supplement contaminated with s. mbandaka and this was shown to be the source of the infections. it is significant that a feed containing purely vegetable components was incriminated.	1982	7061838
acute hepatitis in an opossum (didelphis virginiana) infected with salmonella turnidorp.	salmonella turnidorp was isolated in pure culture from the liver of an opossum that died of acute hepatitis. microscopically, there were random foci of hepatic coagulation necrosis and gram negative bacteria within hepatocytes. the salmonella turnidorp isolate was aberrant in that it did not utilize citrate and did not agglutinate by a commercial salmonella polyvalent antiserum. additional salmonella serotypes, including salmonella mbandaka, salmonella rubislaw, and salmonella anatum were isolat ...	1982	7078089
importation of salmonellae with aquarium species.	an examination of shipments of aquarium species arriving in canada over a 2-year period revealed that one-third of the shipments of aquarium snails and aquarium frogs were contaminated with salmonella. salmonella were also isolated from a shipment of aquarium newts but were not recovered from goldfish. included among these salmonellae were four of the serovars most commonly associated with human salmonellosis in canada. several unusual salmonellae were also isolated including a salmonella florid ...	1981	7248855
[a nosocomial epidemic of salmonella mbandaka which produces various broad spectrum beta-lactamases: preliminary results].	during a nosocomial epidemic of salmonella mbandaka in algeria, 99 strains were isolated from specimens. study of 22 of them revealed minimum inhibiting concentrations ranged from 4 to 32 micrograms/ml for cefotaxime, 2 to 32 micrograms/ml for ceftazidime and 2 to 16 micrograms/ml for ceftriaxione. the mechanism underlying resistance was enzymatic with production of broad-spectrum beta-lactamase enzyme. clavulinic acid at a dose of 2 micrograms/ml restored the activity of hydrolyzed beta-lactama ...	1994	7885201
the isolation of sucrose-fermenting salmonella mbandaka.	during media trials to evaluate the use of brilliant green agar for the primary recognition of salmonella, strains presenting fermentation reactions were observed. all fermenting strains (84 out of 145) belonged to the serotype salmonella mbandaka (58%), and the activity was expressed on three batches of brilliant green agar and one of xylose-lysine desoxycholate agar. it was established using individual lactose and sucrose broth that the reaction in these media was due to sucrose fermentation. ...	1993	8296447
a south australian salmonella mbandaka outbreak investigation using a database to select controls.	between april and june 1996, 15 persons with salmonella enterica serovar mbandaka infection were reported in south australia (population 1.6 million) compared with 12 over the previous five years. to identify a possible source for the infections a case control study was conducted.	1998	9744205
serotyping delays and implications for public health action: the northern territory experience of the 1996 national outbreak of salmonella mbandaka and a comparison with western australia.		1998	9847958
isolation of salmonella spp. from the housefly, musca domestica l., and the dump fly, hydrotaea aenescens (wiedemann) (diptera: muscidae), at caged-layer houses.	flies, especially houseflies, are widely recognized as potential reservoirs and vectors of foodborne salmonella pathogens. in this study, flies were collected at caged-layer facilities that had produced eggs that were implicated as the food vehicle in two recent outbreaks of salmonella enteritidis infections. the flies were separated by species into pools for microbiological testing. a total of 15 species pools of houseflies, musca domestica l., and 7 species pools of bronze dump flies, hydrotae ...	2000	10914668
survey of salmonella serotypes shed in feces of beef cows and their antimicrobial susceptibility patterns.	salmonella prevalence on cow-calf operations was studied as a part of a national study of health and management of the u.s. beef cow-calf industry and was conducted as part of the national animal health monitoring system. within this study, the prevalence of salmonella spp. shed in feces was determined. a total of 5,049 fecal samples were collected from 187 beef cow-calf operations each visited on a single occasion. the number of fecal samples collected per operation was predetermined based on h ...	2000	11131885
typing of salmonella enterica subsp. enterica serovar mbandaka isolates.	recently, salmonella enterica subsp. enterica serovar mbandaka (s. mbandaka) has gained some importance in the epidemiology of salmonellosis in poland. since biotyping, resistance typing, and plasmid profiling were insufficient for strain differentiation, genome macrorestriction by means of pulse-field gel electrophoresis (pfge) was applied and proved to be the method of choice in s. mbandaka epidemiological studies. xbai and bcui macrorestriction produced 15 and 14 pulse-field profiles (pfp), r ...	2001	11295334
colonization of broiler chicks by salmonella typhimurium definitive phage type 104.	the prevalence of an antibiotic-resistant strain of salmonella typhimurium definitive phage type 104 (dt104) has increased dramatically in recent years resulting in increased morbidity and mortality in both animals and humans. colonization and shedding of salmonella typhimurium dt104 was studied in broiler chickens in two trials. in trial 1, 180 day-of-hatch chicks (n = 60 per group, n = 30 per replicate) were challenged with 10(6) cfu dt104 (wild-type isolate from poultry) or were commingled wi ...	2001	11726146
monitoring of chicken houses and an attached egg-processing facility in a laying farm for salmonella contamination between 1994 and 1998.	two chicken houses and an attached egg-processing facility in a laying farm were sampled between 1994 and 1998 to investigate salmonella contamination. each of the houses was environmentally controlled and fitted with egg belts that transported eggs from the houses to the egg-processing facility. four hundred twenty-eight salmonella isolates were obtained from 904 environmental samples collected from the houses. two hundred fifty-two of the 428 (58.9%) isolates yielded five serotypes as follows: ...	2001	11770616
detection and elimination of salmonella mbandaka from naturally contaminated alfalfa seed by treatment with heat or calcium hypochlorite.	in 1999, consumption of alfalfa sprouts contaminated with salmonella mbandaka led to a multistate outbreak of salmonellosis. in this study, the implicated alfalfa seed lot (no. 8,119) was confirmed to be contaminated with salmonella mbandaka at a detection frequency of approximately 72% per replicated 100 g of seed. the sensitivity of detection was improved by a combination of nonselective and selective enrichment of 5.0 ml of germination effluent, followed by immunomagnetic separation. detectio ...	2002	11899042
serotyping and antibiotic resistance profiling of salmonella in feedlot and nonfeedlot beef cattle.	as part of a larger study to assess risk factors associated with hide and carcass contamination of beef cattle during transport to slaughter, a total of 281 salmonellae were isolated from 1,050 rectal, hide, carcass, and environmental samples. for feedlot cattle, salmonellae were recovered from 4.0% of rectal samples, 37.5% of hide samples, 19.0% of carcass samples, and 47.4% of environmental samples. for nonfeedlot cattle, salmonellae were recovered from 10.9% of rectal samples, 37.5% of hide s ...	2002	12430688
prevalence of salmonella in two botswana abattoir environments.	a 1-year study was carried out to investigate the prevalence of salmonella in two abattoir environments coded "a" and "b" in gaborone, botswana. the total number of environmental samples collected from abattoirs a and b was 250 and 300, respectively. the samples were taken from soils in the corrals, knife blades, saw blades, cattle-drinking water, cattle feces, and feed. preenrichment, enrichment, and selective/differential media, which enabled the favorable growth of salmonella, were used in th ...	2002	12495003
occurrence of selected foodborne pathogens on poultry and poultry giblets from small retail processing operations in trinidad.	we conducted a study to determine quantitatively and qualitatively the presence of campylobacter spp., escherichia coli, staphylococci, total coliforms, total aerobic bacteria, and salmonella on broiler carcasses from selected small retail processors in trinidad. we used standard media and procedures for detection and quantification. all carcass and weep samples were positive for aerobic bacteria, e. coli, total coliforms, and staphylococci. significant differences in the mean counts of aerobic ...	2006	16715810
competitive inhibition bacteria of bovine origin against salmonella serovars.	studies were conducted to isolate bacteria inhibitory to salmonella enterica serovar typhimurium definitive type (dt) 104 in vitro from cattle not carrying salmonella and to determine the inhibitory activity of the isolated bacteria through competitive growth in cattle feces artificially contaminated with salmonella typhimurium dt104 and s. enterica serovar newport. fecal samples (108) were obtained from dairy and beef cows. s. enterica serovars were isolated from 9.25% of the samples and includ ...	2007	17803135
survey of salmonella contamination of raw shell eggs used in food service premises in the united kingdom, 2005 through 2006.	this survey was launched after an unusual number of salmonella enteritidis outbreaks associated with the use of eggs in food service premises in england and wales. between november 2005 and december 2006, 9,528 eggs (1,588 pooled samples of 6 eggs) were collected from 1,567 food service premises in the united kingdom, most of which (89%) were produced in the united kingdom. salmonella was isolated from 6 (0.38%) pools of eggs. of these, 5 (0.31%) were salmonella enteritidis, which were further c ...	2008	18236658
salmonella in broiler flocks in the republic of ireland.	in order to obtain an estimation of the prevalence of salmonella spp. in flocks of broilers in the republic of ireland, a study was conducted in 2006 in a total of 362 broiler flocks associated with four integrated companies. salmonella spp. was isolated from 27.3% of flocks, and eight salmonella serovars were identified, none of which were salmonella enteritidis or salmonella typhimurium. the most prevalent serovar was salmonella mbandaka, followed by salmonella kentucky, which respectively acc ...	2009	19061369
salmonella serotype distribution in the dutch broiler supply chain.	salmonella serotype distribution can give insight in contamination routes and persistence along a production chain. therefore, it is important to determine not only salmonella prevalence but also to specify the serotypes involved at the different stages of the supply chain. for this purpose, data from a national monitoring program in the netherlands were used to estimate the serotype distribution and to determine whether this distribution differs for the available sampling points in the broiler ...	2009	19903970
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 ...	2010	21219710
occurrence of escherichia coli o157:h7, listeria monocytogenes, salmonella and campylobacter spp. on beef carcasses in northern ireland.	a survey of beef carcasses was conducted in all 10 european community approved abattoirs in northern ireland to determine the incidence of escherichia coli o157:h7. analyses were based on excised samples of neck meat taken less than 48 h post-kill. overall, 780 carcasses were sampled and all were negative for e. coli o157:h7. a sub-set of samples was analysed for the presence of listeria monocytogenes (n=200), salmonella (n=200) and campylobacter spp.(n=100). l. monocytogenes was not detected bu ...	2001	22062423
molecular typing in public health laboratories: from an academic indulgence to an infection control imperative.	using three austrian case studies, the variegated applications of molecular typing in today's public health laboratories are discussed to help illustrate preventive management strategies relying on dna subtyping. dna macrorestriction analysis by pulsed field gel electrophoresis has become the gold standard for subtyping of food borne pathogens like listeria, salmonella, campylobacter and bacillus cereus. using a salmonella mbandaka outbreak from the year 2010 as example, it is shown how the comp ...	2012	22389752
travel-associated salmonella mbandaka sacroiliac osteomyelitis in a healthy adolescent.	pyogenic infections of the sacroiliac joint are rare and usually caused by staphylococcus aureus. we describe a case of a 16 year-old gymnast who was subsequently diagnosed with salmonella mbandaka sacroiliac osteomyelitis with adjacent psoas abscess and hepatitis one week after returning from a holiday in crete. this case highlights a rare presentation of a common travel-associated foodborne infection.	2013	23607008
occurrence of extended-spectrum β-lactamases among isolates of salmonella enterica subsp. enterica from food-producing animals and food products, in portugal.	a total of 1120 salmonella spp. isolates, recovered from poultry, swine and food products of animal origin (bovine, swine and poultry) over the period of 2009-2011, were investigated in order to determine their serotype, susceptibility to a panel of eleven antimicrobials (a, ampicillin; ct, cefotaxime; cp, ciprofloxacin; tm, trimethoprim; su, sulfamethoxazole; c, chloramphenicol; s, streptomycin; g, gentamicin; t, tetracycline; na, nalidixic acid; fl, florfenicol), and the presence of resistance ...	2013	24135677
a comparison of the bax system method to the u.s. food and drug administration's bacteriological analytical manual and international organization for standardization reference methods for the detection of salmonella in a variety of soy ingredients.	the performances of two dupont bax system pcr assays for detecting salmonella on a variety of low-moisture soy ingredients were evaluated against the u. s. food and drug administration's bacteriological analytical manual (fda bam) method or the international organization for standardization (iso) 6579 reference method. these evaluations were conducted as a single laboratory validation at an iso 17025 accredited third-party laboratory. validations were conducted on five soy ingredients: isolated ...	2014	25285497
an outbreak of multiple serotypes of salmonella in new zealand linked to consumption of contaminated tahini imported from turkey.	a widespread salmonellosis outbreak linked to consumption of hummus made from contaminated tahini imported from turkey occurred in new zealand in november 2012. this article summarizes the outbreak detection, investigation, and control. the new zealand enteric reference laboratory alerted public health units regarding a cluster of 11 persons with salmonella montevideo infection identified from different regions of the north island of new zealand. a multiagency outbreak investigation commenced to ...	2014	25393669
prevalence and characteristics of salmonella spp. isolated from commercial layer farms in korea.	salmonellosis is one of the most prevalent foodborne illnesses. the outbreak of this disease is often associated with eggs. in this study, the prevalence and characteristics of salmonella was surveyed in layer farms in korea. in addition, the risk factors affecting the prevalence of salmonella in these farms were also assessed. of the 32 farms and 67 flocks examined, 19 farms (59.3%) and 34 flocks (50.7%) were observed to be positive for salmonella contamination. salmonella was detected in the s ...	2015	26015591
improvements to a pcr-based serogrouping scheme for salmonella enterica from dairy farm samples.	molecular serotyping through the use of pcr is a simple and useful technique for characterizing isolates of salmonella enterica subsp. enterica belonging to serogroups b, c1, c2, d1, and e1, which are the majority of the isolates associated with human disease outbreaks. however, many of the salmonella strains currently isolated from dairy farms in the northeastern united states are serovar cerro, a group k strain not detected by this assay. primers from a well-known pcr assay for the identificat ...	2015	26038910
study of salmonella typhimurium infection in laying hens.	members of salmonella enterica are frequently involved in egg and egg product related human food poisoning outbreaks worldwide. in australia, salmonella typhimurium is frequently involved in egg and egg product related foodborne illness and salmonella mbandaka has also been found to be a contaminant of the layer farm environment. the ability possessed by salmonella enteritidis to colonize reproductive organs and contaminate developing eggs has been well-described. however, there are few studies ...	2016	26941727
correlating bacterial shedding with fecal corticosterone levels and serological responses from layer hens experimentally infected with salmonella typhimurium.	salmonella enteriditis and salmonella typhimurium are commonly isolated during egg-related outbreaks of salmonellosis and represent a significant international public health issue. in australia, salmonella typhimurium is the most common serovar identified in egg product related foodborne outbreaks. while a number of studies have investigated salmonella shedding and host responses to infection, they have been conducted over a short time period. the present study sought to characterise bacterial s ...	2017	28166810