Abstract:
OBJECTIVE:To develop attenuated strains of Salmonella enterica serovar Typhi (S. typhi) for the candidate vaccine by osmolar stress. METHODS:S. typhi SS3 and SS5 strains were isolated from asymptomatic typhoid carriers in Namakkal, Tamil Nadu, India. Both strains were grown in LB (Luria Bertani) medium supplemented with various concentration of NaCl (0.1-0.7M) respectively. The effect of osmolar stress was determined at molecular level by PCR using MGR 06 and MGR 07 primers corresponding to ompR with chromosomal DNA of S. typhi SS3 and SS5 strains. Attenuation by osmolar stress results in deletion mutation of the S. typhi strains was determined by agglutination assays, precipitation method, SDS PAGE analysis and by animal models. RESULTS:The 799 bp amplified ompR gene product from wild type S. typhi SS3 and SS5 illustrate the presence of virulent gene. Interestingly, there was only a 282 bp amplified product from S. typhi SS3 and SS5 grown in the presence of 0.5, 0.6 and 0.7 M NaCl. This illustrates the occurrence of deletion mutation in ompR gene at high concentration of NaCl. Furthermore, both the wild-type and mutant S. typhi outer membrane SDS-PAGE profile reveals the differences in the expression of ompF, ompC and ompA proteins. In mice, wild type and mutant strains lethal dose (LD50) were determined. The mice died within 72 h when both the wild type strains were injected intraperitoneally with 3 log CFU.mL(-1). When the mice were injected with the mutants in same dosage, no clinical symptoms were observed; whereas the serum antibody titre was elicited within two weeks indicated that the mutants have the ability to induce protective humoral immune response. These results suggest that S. typhi SS3 and SS5 may be used as good candidate strains for the development of live attenuated vaccine against salmonellosis. CONCLUSIONS:This study demonstrates that the S. typhi strains were attenuated and could be good vaccine candidates in future.
journal_name
Asian Pac J Trop Medjournal_title
Asian Pacific journal of tropical medicineauthors
Senthilkumar B,Anbarasu K,Senbagam D,Rajasekarapandian Mdoi
10.1016/S1995-7645(14)60165-6subject
Has Abstractpub_date
2014-12-01 00:00:00pages
933-9issue
12eissn
1995-7645issn
2352-4146pii
S1995-7645(14)60165-6journal_volume
7pub_type
杂志文章abstract:OBJECTIVE:To investigate the effects of ethanolic extract of Lagenaria siceraria fruit (ELSF) on fat amassment and serum TNF- α in high-fat diet-induced obese rats. METHODS:The high fat diet induced obese rats were orally treated with orlistat (50 mg/kg) and ELSF (100, 200, 300 mg/kg/day) to the respective treatment g...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/S1995-7645(12)60109-6
更新日期:2012-09-01 00:00:00
abstract:OBJECTIVE:To evaluate the anti-inflammatory, analgesic, antioxidant and acute toxicity of extracts obtained from a successive extraction with solvents of ascending polarity [hexane, hex; chloroform, CHCl3 and ethanol (EtOH)] of Ternstroemia sylvatica Schltdl. & Cham. METHODS:The antioxidant potential was evaluated by ...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/j.apjtm.2017.10.007
更新日期:2017-11-01 00:00:00
abstract:OBJECTIVE:To investigation the chemopreventive potential of Fumaria indica (F. indica) extract (FIE) on N-nitrosodiethylamine and CCl(4)-induced hepatocarcinogenesis in Wistar rats. METHODS:The experimental animals were divided into six groups (n=6). Hepatocellular carcinoma was induced by single intraperitoneal injec...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/S1995-7645(12)60128-X
更新日期:2012-08-01 00:00:00
abstract:OBJECTIVE:To clone the virB12 gene in pET28a expression vector for production of recombinant protein to be used as antigenic component for future serological test development. METHODS:Brucella melitensis (B. melitensis) 16M strain was cultured and bacterial DNA was extracted by Bioneer AccuPrep® Genomic DNA Extraction...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/S1995-7645(12)60089-3
更新日期:2012-07-01 00:00:00
abstract:OBJECTIVE:To investigate the levels of serum cortisol in patients with uncomplicated Plasmodium falciparum (P. falciparum) malaria in an area of unstable malaria transmission in eastern Sudan. METHODS:The concentrations of cortisol were measured in sera of 25 patients with uncomplicated P. falciparum malaria (at prese...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/S1995-7645(11)60056-4
更新日期:2011-02-01 00:00:00
abstract:OBJECTIVE:To analyze the protective efficacy of recombinant 78 kDa antigen of Leishmania donovani in combination with two adjuvants, that is, cationic liposomes or MPL-A against visceral leishmaniasis in BALB/c mice. METHODS:The genomic DNA of promastigotes was isolated and 583 bp of T cell epitopes of gene encoding 7...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/j.apjtm.2015.06.008
更新日期:2015-07-01 00:00:00
abstract:OBJECTIVE:To determine the impact of seasonal variations on health indices of free-ranging asymptomatic guinea fowls (Numida meleagris) in Zambia. METHODS:A time series analysis was carried out on a prospective cohort study over a 12 month period between March 2010 and February 2011 by examining a total 147 guinea fow...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/S1995-7645(14)60221-2
更新日期:2014-09-01 00:00:00
abstract:OBJECTIVE:To investigate the correlation between nasopharyngeal carcinoma cell WNT5A and epithelial-mesenchymal transition (emt)/metastasis, and investigate its possible mechanisms. METHODS:RT-PCR and gene transfection were used to detect the expression of nasopharyngeal carcinoma cell strains WNT5A and EMT related fa...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/S1995-7645(14)60080-8
更新日期:2014-06-01 00:00:00
abstract:OBJECTIVE:To determine drug resistance mutations and the HIV-1 subtypes among antiretroviral treatment naive HIV-1 patients in Peninsular Malaysia. METHODS:A total of 45 samples from four hospitals that provide HIV viral load services were subjected to the amplification of the protease and two third of reverse transcr...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/j.apjtm.2016.12.005
更新日期:2017-01-01 00:00:00
abstract:OBJECTIVE:To evaluate the curative effect of the 132 KD protein isolated from the seeds of Peganum harmala (P. harmala) L. against carbon tetrachloride (CCl(4)) induced oxidative stress in rats. METHODS:Animals were post treated intraperitoneally with 132 KD isolated protein at doses of 4 and 8 mg/kg body weight and b...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/S1995-7645(13)60058-9
更新日期:2013-04-13 00:00:00
abstract:OBJECTIVE:To invest the differences among mesenchymal stem cells (MSCs) derived from different tissues and their impacts on clinical applications. METHODS:In this study, MSCs were isolated from adipose tissue (AD), umbilical cord tissue (UC), and menstrual blood (Men) and compared their biological characteristics in t...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/j.apjtm.2015.07.022
更新日期:2015-09-01 00:00:00
abstract:OBJECTIVE:To explore the role of miR-214 in the progression of hepatocellular carcinoma (HCC) and its inhibitory mechanisms in depressing the signaling pathway of β-catenin, this study was conducted. METHODS:We ectopically expressed miR-214 in HepG2 cells to obtain cell lines Lv-miR-214-HepG2 and their control Lv-cont...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/S1995-7645(14)60350-3
更新日期:2015-05-01 00:00:00
abstract:OBJECTIVE:To confirm dengue infection among Russian tourists returned from Southeast and Mexico in 2010-2013 with clinical signs of infection. METHODS:Blood and serum samples from patients were collected. NS1 antigen and human IgM/IgG antibodies to dengue virus were identified using commercial tests manufactured by "S...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/S1995-7645(14)60194-2
更新日期:2015-02-01 00:00:00
abstract:OBJECTIVE:To investigate the effects of pectic polysaccharides extracted from Rauwolfia verticillata (Lour.) Baill.var.hainanensis Tsiang on an experimental murine colitis model. METHODS:Experimental colitis was induced by dextran sulfate sodium (DSS), and mice were divided into 4 groups: control, DSS alone, DSS plus ...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/S1995-7645(14)60306-0
更新日期:2015-02-01 00:00:00
abstract::We report two cases of pulmonary sequestration infected with nontuberculous mycobacteria (NTM): Mycobacterium avium and Mycobacterium abscessus. Chest computed tomography showed pneumonic consolidation in the right lower lobe, which received a systemic blood supply from the descending aorta in both patients. Video-ass...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章,评审
doi:10.1016/S1995-7645(12)60172-2
更新日期:2012-11-01 00:00:00
abstract:OBJECTIVE:To draw on data about publication patterns and citation indicators of Asian Pacific Journal of Tropical Medicine (APJTM) during 2008 and June 2014 in order to know about the current state of the journal. METHODS:Data used in this study were collected based on publications in APJTM from 2008 to June, 2014. In...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/S1995-7645(14)60109-7
更新日期:2014-08-01 00:00:00
abstract:OBJECTIVE:To investigate the biosorption potential of isolated bacteria as an alternative biosorbent material for the removal of zinc and nickel from aqueous solution in a bubble column bioreactor. METHORDS:In this study from four points of waste water treatment plant, some Gram-positive and Gram-negative bacteria und...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/S1995-7645(14)60231-5
更新日期:2014-09-01 00:00:00
abstract:OBJECTIVE:To determine the relationship between asymptomatic malaria parasitemia and some oxidative stress parameters in pregnant Nigerian women. METHODS:This is a cross-sectional study involving 130 normal pregnant women at various trimesters, who were attending antenatal clinic at the University of Nigeria Teaching ...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/S1995-7645(11)60076-X
更新日期:2011-03-01 00:00:00
abstract::We present an atypical case of disseminated cutaneous leishmaniasis in the Sihuas district, located in the Andean valleys of Ancash-Peru. A 62-year-old man with no particular medical history presented multiple lesions located on the inferior abdomen, lumbar region and the right anterior thigh. Histological analysis fo...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/j.apjtm.2017.10.001
更新日期:2017-11-01 00:00:00
abstract:OBJECTIVE:To determine resistance status of Culex species to different class of insecticides and assess the major anti-mosquito strategies employed by urban households and their possible effects on malaria acquisition. METHODS:Structured questionnaires were randomly administered to obtain information on demographic ch...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/S1995-7645(13)60153-4
更新日期:2013-11-01 00:00:00
abstract:OBJECTIVE:To demonstrate malaria situation analysis, stratification and planning for an endemic area in southern Iran. METHODS:Data on health system, population, meteorological parameters, malaria cases, anopheline vectors, and control activities during 2005-2007 was obtained from Minab Health Center, Minab Meteorolog...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/S1995-7645(11)60036-9
更新日期:2011-01-01 00:00:00
abstract:OBJECTIVE:To examine the acanthamoebicidal effects of ethyl acetate, aqueous and butanol fractions of dried flower buds of Lonicera japonica (L. japonica) Thunb. (Flos Lonicerae) in vitro. METHODS:Acanthamoeba triangularis isolates were obtained from environmental water samples and identified by PCR. They were exposed...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/j.apjtm.2016.07.008
更新日期:2016-09-01 00:00:00
abstract:OBJECTIVE:To investigate the effect of Cannabis sativa resin and/or tramadol, two commonly drugs of abuse on acetylcholinesterase and butyrylcholinesterase activities as a possible cholinergic biomarkers of neurotoxicity induced by these agents. METHODS:Rats were treated with cannabis resin (5, 10 or 20 mg/kg) (equiva...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/j.apjtm.2016.09.009
更新日期:2016-11-01 00:00:00
abstract:OBJECTIVE:To investigate the in vitro antioxidant and antiproliferative activity of rhizome extracts of Rhodiola imbricata (R. imbricata) in HT-29 human colon cancer cell line. METHODS:The successively extracted rhizome of R. imbricata using various solvents was analyzed for their total phenolics, tannins and flavonoi...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/S1995-7645(12)60194-1
更新日期:2013-01-01 00:00:00
abstract::Toxoplasmosis is a globally distributed parasitic protozoan disease, caused by Toxoplasma gondii. The infection can result in more severe symptoms with potentially life-threatening in case of immunocompromised individuals. Sulfadiazine and pyrimethamine are the two drugs used as a part of standard therapy for toxoplas...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章,评审
doi:10.1016/j.apjtm.2016.06.012
更新日期:2016-08-01 00:00:00
abstract:OBJECTIVE:To investigate the correlation between E670G polymorphism of proprotein convertase subtilisin/kexin type 9 (PCSK9) gene and coronary heart disease (CHD), and contrastively study the regional differences of E670G polymorphism of PCSK9 gene between patients with CHD among the Han population in Hainan and three ...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/j.apjtm.2016.01.008
更新日期:2016-02-01 00:00:00
abstract:OBJECTIVE:To evaluate efficiency of HAART in the prevention of mother to child HIV transmission. METHODS:A longitudinal study was conducted on 1 300 women attending the antenatal service at Saint Camille Medical Centre from September 2010 to July 2011. The HIV status of mothers was determined by rapid tests and ELISA....
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/S1995-7645(12)60188-6
更新日期:2012-12-01 00:00:00
abstract:OBJECTIVE:To evaluate a new pharmacological activity/effect of linolenic acid (α- and γ-form) and conjugated-linoleic acid (CLA) causing antibacterial activity against Mycobacterium tuberculosis (Mtb). METHODS:The anti-Mtb activity/effect of linolenic acid and CLA were determined using different anti-Mtb indicator met...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/j.apjtm.2016.01.021
更新日期:2016-02-01 00:00:00
abstract:OBJECTIVE:To analyze the phytochemical composition and in vitro antioxidant properties of aqueous extract of Aerva lanata (A. lanata) stem. METHODS:During the preliminary phytochemical analysis, the aqueous extract of A. lanata was screened for the presence of carbohydrates, proteins, phenolic compounds, oil and fats,...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/S1995-7645(13)60020-6
更新日期:2013-03-01 00:00:00
abstract:OBJECTIVE:To investigate the efficiency of β-galactosidase gene transfer into rat kidney with ultrasound-mediated microbubble destruction via different injection routes. METHODS:A total of 25 Wistar rats were randomly divided into 5 groups. Four groups received a mixture of optison microbubbles (0.2 mL) and lacz plasm...
journal_title:Asian Pacific journal of tropical medicine
pub_type: 杂志文章
doi:10.1016/S1995-7645(12)60099-6
更新日期:2012-07-01 00:00:00