MyMedR

Shigellosis in Kobe City, Japan, after school excursion to Malaysia and Singapore

Kimura T, Inoue A, Kawakami Y, Shirai C

Jpn J Infect Dis, 2006 Aug;59(4):274.

PMID: 16936352

Matched MeSH terms: Dysentery, Bacillary/microbiology; Dysentery, Bacillary/epidemiology*

Fulltext Shigella vulvovaginitis in a three-year-old child: a case report

Cheong YM, Jegathesan M, Lim YS

Med J Malaysia, 1984 Mar;39(1):92-4.

PMID: 6392838

This is a report of a case of vulvovaginitis due to Shigella flexneri in a three-year-old child. This is probably the first documented case of shigella vulvovaginitis In Malaysia. The patient was successfully treated with cotrimoxazole. Extraintestinal infections by Shigella are rare and are briefly reviewed in this article.

Matched MeSH terms: Dysentery, Bacillary/diagnosis*

Fulltext Annual and geographical distribution of Shigella serotypes in Sabah, Malaysia from 1974 to 1978

Kan SKP, Chan MKC

Med J Malaysia, 1980 Sep;35(1):9-13.

PMID: 7254007

19,983 cases of diarrhoea throughout Sabah, Malaysia from January 1971 to December 1978 were bacteriologically examined for Shigella. A total of 241 Shigella isolates representing 9 serotypes were encountered. S. flexneri and S. sonnei accounted for 69.7% and 29.5% of the isolates respectively. S. flexneri type 2 was very common and comprised 47% of the flexneri strains. S. flexneri types 5.6 and Y were rarely found. Only two cases of S. boydii were isolated. S. dysenteriae was not encountered. Isolation rates ranged from 0.64% to 1.73% while the percentages or cases of diarrhoea bacteriologically examined in relation to the number notified range from 13.7 to 29.6. Kota Kinabalu. Tawau and Sandakan accounted for 50.6%. 21.2% and 8.2% of Shigella isolates respectively. However. no isolations were made from Lahad Datu, Semporna and Victoria [Labuan Island]. S. flexneri type 5 was only found in Sandakan while S. flexnert type Y was isolated from Kota Kinubulu. No S. Sonnel was found in Ranau and Tenom.

Matched MeSH terms: Dysentery, Bacillary/epidemiology*

Fulltext Long-term trends in the epidemiology of human enteropathogens in Malaysia

Shunmugam P, Kanapathy S, Chan SE, Singh KK

Braz J Infect Dis, 2012 Nov-Dec;16(6):603-4.

PMID: 23158263 DOI: 10.1016/j.bjid.2012.07.005

Matched MeSH terms: Dysentery, Bacillary/microbiology; Dysentery, Bacillary/epidemiology*

Fulltext Fulminant hepatic failure and shigella bacteremia

Abidin Z, Iyngkaran N, Puthucheary SD

Med J Malaysia, 1983 Jun;38(2):112-3.

PMID: 6353185

A three and a half year old boy with shigellosis developed fulminant hepatic failure. The hepatic derangements rapidly improved over a period of two weeks after treatment of the shigellosis with parenteral gentamicin. We believe this is the first documented report of fulminant hepatic failure due to shigella sepsis.

Matched MeSH terms: Dysentery, Bacillary/complications*; Dysentery, Bacillary/drug therapy

Fulltext Species distribution and antibiotic resistance of shigella isolates in an urban community in Malaysia

Lee WS, Puthucheary SD

Med J Malaysia, 2003 Jun;58(2):262-7.

PMID: 14569747 MyJurnal

There is an increasing trend for Shigella isolates worldwide to be resistant to commonly prescribed antibiotics. The species distribution and antibiotic resistance of Shigella species isolated from children in Kuala Lumpur, Malaysia from 1978 to 1997 was reviewed. Three hundred and eighty six isolates were positive for Shigella species, representing 1.4% (95% CI: 1.3%-1.6%) of the 26320 total stool specimens and 13% (95% CI: 11.8%-14.2%) of 2986 isolates positive for bacterial pathogens. Shigella flexneri, constituting 74% of all isolates in the first five years of the study, decreased by 40% during the last five years (95% CI of decrease: 22.1%-57.9%), p-value < 0.0001) to 34%. There was a significant reduction (chi2 for linear trend = 77.6, p-value < 0.001) in the number of Shigella isolates as a percentage of total stool isolates obtained. 58% of the 241 isolates tested for antibiotic sensitivity were resistant to at least one antibiotic, and 42% wEre multi-resistant to three or more antibiotics. Shigella species was not a common pathogen among children admitted with diarrhoea in Kuala Lumpur, and was more likely to be resistant to commonly prescribed antibiotics.

Matched MeSH terms: Dysentery, Bacillary/microbiology*; Dysentery, Bacillary/epidemiology*

Isolation of a Plesiomonas shigelloides in Malaysia

Ampalam SD, Fang L

Med J Malaya, 1971 Jun;25(4):282-4.

PMID: 4261301

Matched MeSH terms: Dysentery, Bacillary/diagnosis; Dysentery, Bacillary/microbiology*

Prevalence of multidrug-resistant Shigella isolated in Malaysia

Thong KL, Hoe CH, Koh YT, Yasin RM

J Health Popul Nutr, 2002 Dec;20(4):356-8.

PMID: 12659418

Matched MeSH terms: Dysentery, Bacillary/microbiology; Dysentery, Bacillary/epidemiology*

Fulltext A real-time loop-mediated isothermal amplification assay for rapid detection of Shigella species

Liew PS, Teh CS, Lau YL, Thong KL

Trop Biomed, 2014 Dec;31(4):709-20.

PMID: 25776596 MyJurnal

Shigellosis is a foodborne illness caused by the genus Shigella and is an important global health issue. The development of effective techniques for rapid detection of this pathogen is essential for breaking the chain of transmission. Therefore, we have developed a novel loop-mediated isothermal amplification (LAMP) assay targeting the invasion plasmid antigen H (ipaH) gene to rapidly detect Shigella species. This assay could be performed in 90 min at an optimal temperature of 64ºC, with endpoint results visualized directly. Notably, the method was found to be more sensitive than conventional PCR. Indeed, the detection limit for the LAMP assay on pure bacterial cultures was 5.9 x 10(5) CFU/ml, while PCR displayed a limit of 5.9 x 10(7) CFU/ml. In spiked lettuce samples, the sensitivity of the LAMP assay was 3.6 x 10(4) CFU/g, whereas PCR was 3.6 x 10(5) CFU/g. Overall, the assay accurately identified 32 Shigella spp. with one enteroinvasive Escherichia coli displaying positive reaction while the remaining 32 non-Shigella strains tested were negative.

Matched MeSH terms: Dysentery, Bacillary/diagnosis*; Dysentery, Bacillary/microbiology

Differential expression of cytokine genes in THP-1-derived macrophages infected with mild and virulence strains of Shigella flexneri 2a

Shabani NRM, Mokhtar M, Leow CH, Lean QY, Chuah C, Singh KKB, et al.

Infect Genet Evol, 2020 11;85:104532.

PMID: 32911076 DOI: 10.1016/j.meegid.2020.104532

Shigella is an intracellular bacterial pathogen that causes bacterial dysentery called shigellosis. The assessment of pro- and anti-inflammatory mediators produced by immune cells against this bacteria are vital in identifying the effectiveness of the immune reaction in protecting the host. In Malaysia, Shigella is ranked as the third most common bacteria causing diarrheal disease among children below 5 years old. In the present study, we aim to examine the differential cytokine gene expressions of macrophages in response to two types of clinical strains of Shigella flexneri 2a (S. flexneri 2a) isolated from patients admitted in Hospital Universiti Sains Malaysia, Kelantan, Malaysia. THP-1-derived macrophages, as the model of human macrophages, were infected separately with S. flexneri 2a mild (SH062) and virulence (SH057) strains for 6, 12, and 24 h, respectively. The gene expression level of inflammatory mediators was identified using real-time quantitative polymerase chain reaction (RT-qPCR). The production of nitric oxide (NO) by the macrophages was measured by using a commercialized NO assay kit. The ability of macrophages to kill the intracellular bacteria was assessed by intracellular killing assay. Induction of tumor necrosis factor-alpha (TNFα), interleukin (IL)-1β, IL-6, IL-12, inducible NO synthase (iNOS), and NO, confirmed the pro-inflammatory reaction of the THP-1-derived macrophages in response to S. flexneri 2a, especially against the SH507 strain. The SH057 also induced a marked increase in the expression levels of the anti-inflammatory cytokine mRNAs at 12 h and 24 h post-infection. In the intracellular killing assay, both strains showed less viable, indicating the generation of pro-inflammatory cytokines in the presence of iNOS and NO was crucial in the stimulation of macrophages for the host defense against shigellosis. Transcription analysis of THP-1-derived macrophages in this study identifies differentially expressed cytokine genes that correlated with the virulence factor of S. flexneri 2a.

Matched MeSH terms: Dysentery, Bacillary/genetics*; Dysentery, Bacillary/epidemiology; Dysentery, Bacillary/physiopathology*

Fulltext Characteristics of childhood diarrhea associated with enterotoxigenic Escherichia coli in Malaysia

Samuel S, Vadivelu J, Parasakthi N

Southeast Asian J Trop Med Public Health, 1997 Mar;28(1):114-9.

PMID: 9322293

Amongst 107 diarrheal cases studied a bacterial agent was isolated from 71 (66%) cases of which 60 (85%) were due to a single agent and the remaining 11 (15%) were of mixed infections. Enterotoxigenic Escherichia coli (ETEC) was isolated from 65 cases. Other pathogens isolated included Salmonella spp, Shigella spp and rotavirus. There was a higher isolation rate of ETEC from females and rotavirus from males. The infection rate was found to higher for the 0-2 year age group as compared to the 3-5 year age group. Amongst the ETEC isolated the STa 2 toxotype was the predominant type.

Matched MeSH terms: Dysentery, Bacillary/diagnosis; Dysentery, Bacillary/microbiology; Dysentery, Bacillary/epidemiology

Alteration in apyrase enzyme attenuated virulence of Shigella flexneri

BangaSingh KK, Nisha M, Lau HY, Ravichandran M, Salleh MZ

Microb Pathog, 2016 Feb;91:123-8.

PMID: 26706344 DOI: 10.1016/j.micpath.2015.12.004

Virulence of Shigella is attributed to the genes presence in chromosome or in the megaplasmid. The apy gene which is located in the megaplasmid of Shigella species encodes for apyrase enzyme, a pathogenesis-associated enzyme causing mitochondrial damage and host cell death. In this study we constructed an apy mutant of Shigella flexneri by insertional activation using a kanamycin resistant gene cassette. The wild type apy gene of S. flexneri 2a was PCR amplified, cloned and mutated with insertion of kanamycin resistant gene cassette (aphA). The mutated construct (apy: aphA) was subcloned into a conjugative suicidal vector (pWM91) at the unique Sma1 and Sac1 sites. The mutation of the wild apy gene in the construct was confirmed by DNA sequencing. The mutated construct was introduced into wild type S. flexneri 2a by conjugation with Escherichia coli. After undergoing homologous recombination, the wild apy gene was deleted from the construct using the sucrose selection method. Non-functional activity of the apyrase enzyme in the constructed strain by colorimetric test indicated the successful mutation of the apyrase enzyme. This strain with mutated apy gene was evaluated for its protective efficacy using the guinea pig keratoconjunctivitis model. The strain was Sereny negative and it elicited a significant protection following challenge with wild S. flexneri strain. This apy mutant strain will form a base for the development of a vaccine target for shigellosis.

Matched MeSH terms: Dysentery, Bacillary/microbiology*

Serotype prevalence and antibiotic susceptibility of Shigella strains isolated in Malaysia during 1980 and 1981

Jegathesan M

J Diarrhoeal Dis Res, 1984 Jun;2(2):102-4.

PMID: 6501820

Matched MeSH terms: Dysentery, Bacillary/microbiology*

Fulltext Characterization of Shigella sonnei in Malaysia, an increasingly prevalent etiologic agent of local shigellosis cases

Koh XP, Chiou CS, Ajam N, Watanabe H, Ahmad N, Thong KL

BMC Infect Dis, 2012;12:122.

PMID: 22606962 DOI: 10.1186/1471-2334-12-122

Shigellosis is a major public health concern worldwide, especially in developing countries. It is an acute intestinal infection caused by bacteria of the genus Shigella, with a minimum infective dose as low as 10-100 bacterial cells. Increasing prevalence of Shigella sonnei as the etiologic agent of shigellosis in Malaysia has been reported. As there is limited information on the genetic background of S. sonnei in Malaysia, this study aimed to characterize Malaysian S. sonnei and to evaluate the prospect of using multilocus variable-number tandem-repeat (VNTR) analysis (MLVA) for subtyping of local S. sonnei.

Matched MeSH terms: Dysentery, Bacillary/microbiology*; Dysentery, Bacillary/epidemiology*

Detection of virulence genes in Malaysian Shigella species by multiplex PCR assay

Thong KL, Hoe SL, Puthucheary SD, Yasin R

BMC Infect Dis, 2005 Feb 14;5:8.

PMID: 15707504

In Malaysia, Shigella spp. was reported to be the third commonest bacterial agent responsible for childhood diarrhoea. Currently, isolation of the bacterium and confirmation of the disease by microbiological and biochemical methods remain as the "gold standard". This study aimed to detect the prevalence of four Shigella virulence genes present concurrently, in randomly selected Malaysian strains via a rapid multiplex PCR (mPCR) assay.

Matched MeSH terms: Dysentery, Bacillary/diagnosis; Dysentery, Bacillary/microbiology

Fulltext Outer membrane proteins analysis of Shigella sonnei and evaluation of their antigenicity in Shigella infected individuals

Harikrishnan H, Banga Singh KK, Ismail A

PLoS One, 2017;12(8):e0182878.

PMID: 28846684 DOI: 10.1371/journal.pone.0182878

Bacillary dysentery caused by infection with Shigella spp. remains as serious and common health problem throughout the world. It is a highly multi drug resistant organism and rarely identified from the patient at the early stage of infection. S. sonnei is the most frequently isolated species causing shigellosis in industrialized countries. The antigenicity of outer membrane protein of this pathogen expressed during human infection has not been identified to date. We have studied the antigenic outer membrane proteins expressed by S. sonnei, with the aim of identifying presence of specific IgA and IgG in human serum against the candidate protein biomarkers. Three antigenic OMPs sized 33.3, 43.8 and 100.3 kDa were uniquely recognized by IgA and IgG from patients with S. sonnei infection, and did not cross-react with sera from patients with other types of infection. The antigenic proteome data generated in this study are a first for OMPs of S. sonnei, and they provide important insights of human immune responses. Furthermore, numerous prime candidate proteins were identified which will aid the development of new diagnostic tools for the detection of S. sonnei.

Matched MeSH terms: Dysentery, Bacillary/microbiology*

Fulltext Shigella flexneri serotype 1c derived from serotype 1a by acquisition of gtrIC gene cluster via a bacteriophage

Tang SS, Carlin NI, Talukder KA, Cam PD, Verma NK

BMC Microbiol, 2016 Jun 27;16(1):127.

PMID: 27349637 DOI: 10.1186/s12866-016-0746-z

BACKGROUND: Shigella spp. are the primary causative agents of bacillary dysentery. Since its emergence in the late 1980s, the S. flexneri serotype 1c remains poorly understood, particularly with regard to its origin and genetic evolution. This article provides a molecular insight into this novel serotype and the gtrIC gene cluster that determines its unique immune recognition.

RESULTS: A PCR of the gtrIC cluster showed that serotype 1c isolates from different geographical origins were genetically conserved. An analysis of sequences flanking the gtrIC cluster revealed remnants of a prophage genome, in particular integrase and tRNA(Pro) genes. Meanwhile, Southern blot analyses on serotype 1c, 1a and 1b strains indicated that all the tested serotype 1c strains may have had a common origin that has since remained distinct from the closely related 1a and 1b serotypes. The identification of prophage genes upstream of the gtrIC cluster is consistent with the notion of bacteriophage-mediated integration of the gtrIC cluster into a pre-existing serotype.

CONCLUSIONS: This is the first study to show that serotype 1c isolates from different geographical origins share an identical pattern of genetic arrangement, suggesting that serotype 1c strains may have originated from a single parental strain. Analysis of the sequence around the gtrIC cluster revealed a new site for the integration of the serotype converting phages of S. flexneri. Understanding the origin of new pathogenic serotypes and the molecular basis of serotype conversion in S. flexneri would provide information for developing cross-reactive Shigella vaccines.

Matched MeSH terms: Dysentery, Bacillary/microbiology

[Incidence of diarrhea and antibiotic therapy in cynomolgus monkeys imported for medical use (author's transl)]

Takasaka M, Morota S, Kasono T, Abe M, Honjo S

Jikken Dobutsu, 1973 Jul;22(3):227-36.

PMID: 4204642

Matched MeSH terms: Dysentery, Bacillary/veterinary

Severe infection with Trichuris trichiura in Malaysian children. A clinical study of 30 cases treated with stilbazium iodine

Kamath KR

Am J Trop Med Hyg, 1973 Sep;22(5):600-5.

PMID: 4729740

Matched MeSH terms: Dysentery, Bacillary/complications

A 9-year study of shigellosis in Northeast Malaysia: Antimicrobial susceptibility and shifting species dominance

Banga Singh KK, Ojha SC, Deris ZZ, Rahman RA

Z Gesundh Wiss, 2011 Jun;19(3):231-236.

PMID: 21654922

AIMS: In Malaysia, Shigella spp. is the third most common bacterial agent responsible for childhood diarrhoea. This study was conducted to determine the prevalence and antimicrobial susceptibility patterns of Shigella spp. isolated from patients admitted to the Hospital Universiti Sains Malaysia from January 2001 to December 2009. SUBJECTS AND METHODS: A hospital-based retrospective study was used. Stool samples from patients were cultured using a standard culture method. Shigella spp. isolates were identified by biochemical and serological methods, and the antimicrobial susceptibility pattern was evaluated using the Kirby-Bauer disc-diffusion method. RESULTS: A total of 138 Shigella spp. were isolated from a total of 14,830 routine stool specimens, yielding an isolation rate of 0.93% that corresponded to 9.99% of the 1,381 bacterial pathogens isolated. Of these isolates, S. sonnei was the predominant species, followed by S. flexneri and S. boydii. Seasonal variation was noticed, and no significant differences were detected in the demographic data for S. flexneri and S. sonnei. The susceptibility of all isolated Shigella strains was tested against seven antibiotics. Ceftriaxone (99.1%), ciprofloxacin (98.4%), and nalidixic acid (93.8%) were effective against the Shigella strains, whereas tetracycline and trimethoprim-sulfamethoxazole exhibited high frequencies of resistance (58.4% and 53.8%, respectively). CONCLUSION: This study is important for public health education aimed at reducing the morbidity and mortality associated with Shigella spp. infection. Our results also will be helpful for paediatricians and microbiologists in the selection of appropriate antibiotics for the management of diarrhoea.

Matched MeSH terms: Dysentery, Bacillary

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