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   2012| January-March  | Volume 4 | Issue 1  
    Online since March 13, 2012

 
 
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ORIGINAL ARTICLES
Analyzing a potential drug target N-myristoyltransferase of Plasmodium falciparum through in silico approaches
Amit Kumar Banerjee, Neelima Arora, USN Murty
January-March 2012, 4(1):43-54
DOI:10.4103/0974-777X.93761  
Background: Despite concerted global efforts to combat malaria, malaria elimination is still a remote dream. Fast evolution rate of malarial parasite along with its ability to respond quickly to any drug resulting in partial or complete resistance has been a cause of concern among researcher communities. Materials and Methods: Molecular modeling approach was adopted to gain insight about the structure and various analyses were performed. Modeller 9v3, Protparam, Protscale, MEME, NAMD and other tools were employed for this study. PROCHECK and other tools were used for stereo-chemical quality evaluation. Results and Conclusion: It was observed during the course of study that this protein contains 32.2% of aliphatic amino acids among which Leucine (9.5%) is predominant. Theoretical pI of 8.39 identified the protein as basic in nature and most of the amino acids present in N-Myristoyltransferase are hydrophobic (46.1%). Secondary structure analysis shows predominance of alpha helices and random coils. Motif analyses revealed that this target protein contains 2 signature motifs, i.e., EVNFLCVHK and KFGEGDG. Apart from motif search, three-dimensional model was generated and validated and the stereo-chemical quality check confirmed that 97.7% amino acid residues fall in the core region of Ramachandran plot. Molecular dynamics simulation resulted in maximum 1.3 Å Root Mean Square Deviation (RMSD) between the initial structure and the trajectories obtained later on. The template and the target molecule has shown 1.5 Å RMSD for the C alpha trace. A docking study was also conducted with various ligand molecules among which specific benzofuran compounds turned out to be effective. This derived information will help in designing new inhibitor molecules for this target protein as well in better understanding the parasite protein.
  6,217 19 2
Diagnosis of Trichomonas vaginalis from vaginal specimens by wet mount microscopy, in pouch TV culture system, and PCR
Madhumati J Patil, Jyoti M Nagamoti, Sharada C Metgud
January-March 2012, 4(1):22-25
DOI:10.4103/0974-777X.93756  
Background: In recent years, trichomoniasis has emerged as the most common sexually transmitted disease and limited data are available on the effective screening technique for the diagnosis of Trichomonas vaginalis. Aim : The aim was to compare and evaluate different diagnostic methods like wet mount microscopy, In Pouch TV culture, and Polymerase chain reaction (PCR) to establish which method or combination of methods was most effective for detection of Trichomonas vaginalis in vaginal swab specimens. Settings and Design : This is a cross-sectional study. Materials and Methods : A total of 200 patients complaining of vaginal discharge were included in the study. Three vaginal swabs were screened for trichomoniasis by wet mount microscopy, In Pouch TV culture system and PCR, using TVK3 and TVK7 specific primers. Results : Of the 200 cases studied, 36 (18%) were positive by wet mount microscopy, 44 (22%) by In Pouch TV culture system and 60(30%) by PCR. Sensitivity and specificity of wet mount were 60% and 100%, respectively, whereas sensitivity and specificity of the In Pouch TV culture system were 73.33% and 100%, respectively when compared to PCR. Conclusion : Comparison of different methods showed that at least two techniques, such as wet mount microscopy and culture have a better chance of detection of T. vaginalis infection. Diagnosis of trichomoniasis by PCR was found to be highly specific and sensitive, but its availability and cost effectiveness limit its use in routine diagnostic laboratories.
  5,238 21 4
Prevalence and risk factors of intestinal helminth infection among rural Malay children
Lim Boon Huat, Amal K Mitra, Noor Izani Noor Jamil, Pim Chau Dam, Hamid Jan Jan Mohamed, Wan Abdul Manan Wan Muda
January-March 2012, 4(1):10-14
DOI:10.4103/0974-777X.93753  
Background: Soil-transmitted intestinal helminth infection is prevalent in rural communities of Malaysia. Risk factors contributing to helminth infections are largely unknown in the country. Aim: To determine the prevalence and risk factors of intestinal helminth infections among children in Beris Lalang, a rural Muslim community of Malaysia. Settings and Design : In this cross-sectional study, children aged 7-9 years were recruited during the mass Friday prayer at Beris Lalang mosque by trained imams (religious leaders). A standardized questionnaire was used to obtain information on socio-demographic profile, daily hygienic practices, and history of helminth infection. Results: Out of 79 samples, 29 (37%) were positive for helminthic ova, of which 24 were ova of Trichuris trichiura. Poor education of the mother (primary education or less) (P=0.015), eating raw salad (P=0.03), and no physical activities (P=0.03) were found independent risk factors for the child's helminth infections in univariate analysis. A higher proportion of children with helminth infections complained of tiredness and fatigue compared to those without such infections (36% vs. 12%, P=0.019). In a multivariate analysis of predictors of helminth infection, poor education of the mother (P=0.02) and eating raw salad (P=0.04) remained statistically significant, after controlling for several other potential risk factors. Conclusions : T. trichiura was the most prevalent intestinal helminth infection in children in rural Malaysia. Risk factors of helminth infection included mother's poor education and eating raw salad and vegetables.
  4,992 17 3
CASE REPORTS
A 12-year-old child with trichinellosis, pyomyositis and secondary osteomyelitis
Sudesh Pebam, Vijay Goni, Sandeep Patel, Vishal Kumar, Saurabh Rawall, Kamal Bali
January-March 2012, 4(1):84-88
DOI:10.4103/0974-777X.93769  
Trichinellosis is a parasitic infestation affecting the skeletal muscles. Cases of trichinellosis in humans have been reported from most regions of the world. However, a review of literature revealed only two reported cases of human trichinellosis in India. Further, a diagnosis of superimposed pyomyositis in trichinellosis with secondary osteomyelitis has not been reported to our knowledge. This article reports this rare case presentation in a 12-year-old child. Timely intervention helped prevent long-term morbidity in our patient. In our case report, we also discuss in detail the pathogenesis of such a condition and discuss the role of imaging modalities and an early magnetic resonance imaging (MRI) to diagnose the condition and start an early treatment.
  4,758 16 1
EDITORIAL COMMENTARY
Male circumcision and HIV: Do all roads lead to Rome?
Maximo O Brito
January-March 2012, 4(1):4-5
DOI:10.4103/0974-777X.93748  
  4,521 14 -
REVIEW ARTICLE
Infection control during filoviral hemorrhagic fever outbreaks
N Raabe Vanessa, Borchert Matthias
January-March 2012, 4(1):69-74
DOI:10.4103/0974-777X.93765  
Breaking the human-to-human transmission cycle remains the cornerstone of infection control during filoviral (Ebola and Marburg) hemorrhagic fever outbreaks. This requires effective identification and isolation of cases, timely contact tracing and monitoring, proper usage of barrier personal protection gear by health workers, and safely conducted burials. Solely implementing these measures is insufficient for infection control; control efforts must be culturally sensitive and conducted in a transparent manner to promote the necessary trust between the community and infection control team in order to succeed. This article provides a review of the literature on infection control during filoviral hemorrhagic fever outbreaks focusing on outbreaks in a developing setting and lessons learned from previous outbreaks. The primary search database used to review the literature was PUBMED, the National Library of Medicine website.
  3,788 15 1
ORIGINAL ARTICLES
International nosocomial infection control consortium findings of device-associated infections rate in an intensive care unit of a Lebanese university hospital
SS Kanj, ZA Kanafani, N Sidani, L Alamuddin, N Zahreddine, VD Rosenthal
January-March 2012, 4(1):15-21
DOI:10.4103/0974-777X.93755  
Objectives: To determine the rates of device-associated healthcare-associated infections (DA-HAI), microbiological profile, bacterial resistance, length of stay (LOS), excess mortality and hand hygiene compliance in one intensive care unit (ICU) of a hospital member of the International Infection Control Consortium (INICC) in Beirut, Lebanon. Materials and Methods: An open label, prospective cohort, active DA-HAI surveillance study was conducted on adults admitted to a tertiary-care ICU in Lebanon from November 2007 to March 2010. The protocol and methodology implemented were developed by INICC. Data collection was performed in the participating ICUs. Data uploading and analyses were conducted at INICC headquarters on proprietary software. DA-HAI rates were recorded by applying the definitions of the National Healthcare Safety Network (NHSN) at the US Centers for Disease Control and Prevention (CDC). We analyzed the DA-HAI, mechanical ventilator-associated pneumonia (VAP), central line-associated bloodstream infection (CLA-BSI), and catheter-associated urinary tract infection (CAUTI) rates, microorganism profile, excess LOS, excess mortality, and hand hygiene compliance. Results: A total of 666 patients hospitalized for 5,506 days acquired 65 DA-HAIs, an overall rate of 9.8% [(95% confidence interval (CI) 7.6-12.3], and 11.8 (95% CI 9.1-15.0) DA-HAIs per 1000 ICU-days. The CLA-BSI rate was 5.2 (95% CI 2.8-8.7) per 1000 catheter-days; the VAP rate was 8.1 (95% CI 5.5-11.7) per 1000 ventilator-days; and the CAUTI rate was 4.1 (95% CI 2.6-6.2) per 1000 catheter-days. LOS of patients was 7.3 days for those without DA-HAI, 13.8 days for those with CLA-BSI, 18.8 days for those with VAP. Excess mortality was 40.9% [relative risk (RR) 3.14; P 0.004] for CLA-BSI. Mortality of VAP and CAUTI was not significantly different from patients without DA-HAI. Escherichia coli was the most common isolated microorganism. Overall hand hygiene compliance was 84.9% (95% CI 82.3-87.3). Conclusions: DA-HAI rates, bacterial resistance, LOS and mortality were moderately high, below INICC overall data and above CDC-NHSN data. Infection control programs including surveillance and antibiotic policies are essential and continue to be a priority in Lebanon.
  3,650 27 1
CASE REPORTS
Mycobacterium chelonae infection of the parotid gland
Hamid S Shaaban, Sharma L Bishop, Laila Menon, Jihad Slim
January-March 2012, 4(1):79-81
DOI:10.4103/0974-777X.93767  
Mycobacterium chelonae can cause numerous infections, including lung disease, local cutaneous disease, osteomyelitis, joint infections and ocular disease. With the exception of lung disease, these syndromes commonly develop after direct inoculation. The most common clinical presentation in immunocompetent individuals is skin and soft tissue infection. We present a case of M. chelonae infection of the parotid gland that was successfully treated with clarithromycin monotherapy. To our knowledge, this is the first case report of M. chelonae parotitis in an adult.
  2,925 16 3
ORIGINAL ARTICLES
Enterococcal bacteremia is associated with prolonged stay in the medical intensive care unit
Viju Moses, Jayakumar Jerobin, Anupama Nair, Sowmya Sathyendara, Veeraraghavan Balaji, Ige Abraham George, John Victor Peter
January-March 2012, 4(1):26-30
DOI:10.4103/0974-777X.93758  
Background: Although enterococci are relatively common nosocomial pathogens in surgical intensive care units (ICUs), their significance in blood cultures from patients in the medical ICU is unclear. Materials and Methods: In this retrospective study spanning 2 years, the clinical and microbiological characteristics of enterococcal bacteremia among medical ICU patients were evaluated. Results: Of 1325 admissions, 35 with enterococcal bacteremia accounted for 14.8% of positive blood cultures. They were significantly older (P=0.03) and had various co-morbidities. Most had vascular (96.9%) and urinary (85.3%) catheters, and 67.7% were mechanically ventilated. In addition to blood, enterococci were isolated from vascular catheters (8.6%) and other sites (20%), while no focus was identified in 77% of patients. Prior use of broad-spectrum antimicrobials was nearly universal. All isolates tested were sensitive to vancomycin and linezolid. Resistance to ampicillin and gentamicin were 44.7% and 52.6%, respectively. Compared with other medical ICU patients, patients with enterococcal bacteremia had a longer ICU stay (P<0.0001) and a trend toward higher ICU mortality (P=0.08). Conclusions: Enterococcal bacteremia is an important nosocomial infection in the medical ICU, with a predilection for older patients with multiple comorbidities. Its occurrence is associated with a significantly longer ICU stay and a trend to a higher mortality. The choice of antibiotics should be dictated by local susceptibility data.
  2,923 15 4
SPECIAL ARTICLE
Nanotechnology applications to HIV vaccines and microbicides
Sandhya Boyapalle, Subhra Mohapatra, Shyam Mohapatra
January-March 2012, 4(1):62-68
DOI:10.4103/0974-777X.93764  
Human immunodeficiency virus/acquired immunodeficiency syndrome (HIV/AIDS) remains one of the most serious threats to global health. Today there are no HIV vaccines which can prevent HIV infection. All of the candidates being studied are in the experimental stage. Preventive vaccine candidates are being tested in HIV-negative people to see if they can prevent infection. With of the development of a safe and effective vaccine still likely to be years away, topical microbicide formulations that are applied vaginally and rectally are receiving greater interest as an effective alternative to slow down the global spread of HIV. Current microbicide trials that aim to prevent the sexual transmission of HIV are using gels, creams, rings, films and there is also work underway to explore other types of 'delivery' systems. There have been numerous reports on safety and lack of toxicity of the application of nanotechnology for targeted delivery and slow, sustained release of drugs, proteins, peptides or nucleic acids by any route to maximize effectiveness and minimize adverse effects. The application of nanotechnology for targeting drugs and macromolecules to specific tissues or cells is one of the most important areas in nanomedicine research. Thus far nanoparticles provide a strong platform to combine protein and DNA based vaccines/microbicides and will facilitate the production, preclinical evaluation and clinical testing in the future.
  2,808 20 2
ORIGINAL ARTICLES
An investigation of an outbreak of viral hepatitis B in Modasa town, Gujarat, India
Disha A Patel, Praveg A Gupta, Deepa M Kinariwala, Hetal S Shah, Grishma R Trivedi, Mahendra M Vegad
January-March 2012, 4(1):55-59
DOI:10.4103/0974-777X.93762  
Background: Most outbreaks of viral hepatitis in India are caused by hepatitis E. Recently in the year 2009, Modasa town of Sabarkantha district in Gujarat witnessed the outbreak of hepatitis B. Purpose: An attempt was made to study the outbreak clinically and serologically, to estimate the seropositivity of hepatitis B Virus among the cases and their contacts and to know the seroprevalence of hepatitis B envelope antigen (HBeAg) and IgM antibody against hepatitis B core antigen (IgM HBcAb) out of all the Hepatitis B surface Antigen (HBsAg) positive ones. Materials and Methods: Eight hundred and fifty-six (856) cases and 1145 contacts were evaluated for hepatitis B markers namely HBsAg, HBeAg and IgM HBcAb by enzyme-linked immuno Sorbent Assay (ELISA) test. Results: This outbreak of viral hepatitis B in Modasa, Gujarat was most likely due to unsafe injection practices. Evidence in support of this was collected by Government authorities. Most of the patients and approximately 40% of the surveyed population gave history of injections in last 1.5-6 months. Total 664/856 (77.57%) cases and 20/1145 (1.75%) contacts were found to be positive for HBsAg. 53.41% of the positive cases and 52.93% of the positive contacts were HBeAg-positive and thus in a highly infectious stage. Conclusions: Inadequately sterilized needles and syringes are an important cause of transmission of hepatitis B in India. Our data reflects the high positivity rate of a hepatitis B outbreak due to such unethical practices. There is a need to strengthen the routine surveillance system, and to organise a health education campaign targeting all health care workers including private practitioners, especially those working in rural areas, as well as the public at large, to take all possible measures to prevent this often fatal infection.
  2,604 14 1
Assessment of Helicobacter pylori prevalence by scorpion real-time PCR in chronic tonsillitis patients
T Naserpour Farivar, AA Pahlevan, P Johari, F Safdarian, M Aslani Mehr, R Najafipour, F Ahmadpour
January-March 2012, 4(1):38-42
DOI:10.4103/0974-777X.93760  
Background: Occasionally, bacteria or viruses enter the tonsils and these organs become overwhelmed by bacterial or viral infection leading to inflammation. Some studies confirmed the presence of Helicobacter pylori in tonsillar specimens of patients suffering from chronic tonsillitis and some others did not. The difference in results in various studies might be due to different laboratory methods. The aim of this study was to investigate the presence of H. pylori Deoxynucleic acid (DNA) in archival tonsillar tissues of patients with chronic tonsillitis by a rapid, sensitive, and specific technique of Scorpion real-time polymerase chain reaction (PCR). Materials and Methods: Scorpion real-time PCR and modified McMullen's staining was performed on 103 archival paraffin-embedded tonsillar samples collected from patients with chronic tonsillitis following tonsillectomy operation. Results: Our findings showed that H Cell and Molecular Research Center. pylori DNA was present in 21.35% of total specimens by using Scorpion real-time PCR. Modified McMullen's staining of paraffin-embedded sections was positive in 19 patients. Out of our 103 samples, 50 samples showed positive a rapid urease test whereas 53 samples demonstrated negative results, 20 produced positive PCR results, and 83 were negative for H. pylori. There was no significant relationship between the presence of H. pylori, sex, age, and place of residence. Conclusion: Although the existence of H. pylori in tonsillar tissue samples of patients with chronic tonsillitis is controversial, however, our results showed that in our studied specimens, a significant number of patients with chronic tonsillitis had H. pylori colonization.
  2,511 17 8
CASE REPORTS
Suprasellar tuberculoma presenting as sudden onset blindness in a patient of lupus
Rudrajit Paul, Amit K Banerjee, Ramtanu Bandyopadhyay
January-March 2012, 4(1):75-78
DOI:10.4103/0974-777X.93766  
Tuberculosis can be an opportunistic infection complicating the course of patients receiving prolonged immunosuppression. In these patients, the tuberculosis can involve the central nervous system and can cause diagnostic difficulty due to atypical features. Often, the diagnosis of central nervous system tuberculosis in resource limited settings is indirect, like imaging. But anti-tubercular drugs, given even on empirical basis can be life saving. A case of a young female systemic lupus erythematosus patient (on prolonged steroids) with intracranial tuberculoma is presented here. She presented with blindness and headache and her computed tomography scan showed a calcified mass in the suprasellar location. However, she responded well to anti-tubercular drugs. The differential diagnoses of such lesions are also discussed.
  2,331 15 -
ORIGINAL ARTICLES
Increased likelihood of bacterial pathogens in the coronal sulcus and urethra of uncircumcised men in a diverse group of HIV infected and uninfected patients in India
John A Schneider, Sreenivasan Vadivelu, Chuanhong Liao, Shivani R Kandukuri, Bhavesh V Trikamji, Eugene Chang, Dionysis Antonopoulos, SV Prasad, Vemu Lakshmi
January-March 2012, 4(1):6-9
DOI:10.4103/0974-777X.93750  
Background: The biological mechanism of circumcision as potentiating HIV prevention is poorly understood. Foreskin microbiota has been postulated as having a potential role; however, little is known about the relationship between bacterial pathogens and circumcision in adults. Materials and Methods: We sampled the coronal sulcus of a diverse group of circumcised and uncircumcised men (n=315) from a government chest hospital and fertility clinic in Hyderabad, Andhra Pradesh, India. Genital examination was conducted on three groups of men: Group 1 - HIV infected; Group 2 - TB infected; Group 3 - control. Aerobic and anaerobic specimens were cultured according to standard clinical protocols, and results were analyzed following multivariate logistic regression models. Results: Three hundred fifteen study participants - 47.6% of Group 1, 36.5% of Group 2, and 15.9% of Group 3 - were enrolled in the study and included in all analyses. Overall 37.1% of the participants were circumcised without variation across groups (P=0.29). Smegma was observed in 18.7% of the participants with no cases observed in Group 3 (P<0.001). Gram-negative pathogens were more prevalent among study participants in Group 1 (22.7%) and Group 2 (30.4%) as compared with those in Group 3 (6.0%) (P=0.003). In multivariate regression analysis, controlling for group, age, and presence of smegma, uncircumcised men were more likely to be colonized with gram positives [Adjusted Odds Ratio (AOR) 1.9; P<0.05)], gram negatives (AOR 2.4; P<0.05), or any pathogen (AOR 2.8; P<0.005). Conclusions: Uncircumcised men in this population in South India are more likely to harbor bacterial pathogens in the coronal sulcus than do their circumcised counterparts. Future studies should examine the relationship between foreskin microbiota and HIV transmission.
  2,223 17 3
INFORMATION NOTE
Oral myiasis is a potential risk in patients with special health care needs
Akhilesh Sharma
January-March 2012, 4(1):60-61
DOI:10.4103/0974-777X.93763  
Myiasis is a rare disease caused by invasion of tissue by larvae of certain dipteran flies. It is more common in countries with tropical climate. Oral myiasis is not a very common condition and many clinicians are unaware of its diagnosis. Common predisposing factors are poor oral hygiene, halitosis, trauma, senility, learning disabilities, physically and mentally challenged conditions. Oral myiasis can lead to rapid tissue destruction and disfigurement and requires immediate treatment. Treatment consists of manual removal of maggots from oral cavity after application of chemical agents. Use of antibiotics reduces the duration of infection and hastens the recovery period. Good sanitation, personal and environmental hygiene and cleanliness and special care for debilitated persons are the best methods to prevent oral myiasis.
  2,186 12 2
CASE REPORTS
Recurrent sepsis due to Bacillus licheniformis
Irina A Haydushka, Nadya Markova, Vesselina Kirina, Maria Atanassova
January-March 2012, 4(1):82-83
DOI:10.4103/0974-777X.93768  
Bacillus licheniformis is recognized as a human pathogen causing infections, mainly in immunocompromised patients. We present a case of sepsis in an immunocompetent patient, caused by B. licheniformis. This case is of particular interest because the patient had no history of any immune deficiency and the disease did not respond to antibiotic treatment.
  2,157 13 2
ORIGINAL ARTICLES
Application of polymerase chain reaction to detect Burkholderia pseudomallei and Brucella species in buffy coat from patients with febrile illness among rural and peri-urban population
Balaji Nandagopal, Sathish Sankar, Karthikeyan Lingesan, KC Appu, Gopalan Sridharan, Anilkumar Gopinathan
January-March 2012, 4(1):31-37
DOI:10.4103/0974-777X.93759  
Context: Melioidosis and Brucellosis are important endemic infections among people in India, especially in rural settings. Conventional detection techniques have several limitations. Only a few studies exist on the prevalence of Melioidosis and Brucellosis in rural area especially in India. Aim: We sought to evaluate detection of Burkholderia pseudomallei and Brucella spp. among patients presenting febrile illness. Material and Methods: Previously described polymerase chain reaction ( PCR) assays for both pathogens were evaluated with Deoxyribonucleic acid extracts of buffy coat samples collected from 301 patients recruited prospectively. Data was not amenable to statistical analysis. Results: The PCR showed specific amplification and no non-specific amplification with heterologous Gram-negative bacilli. The lower limit of detection of the assay for B. pseudomallei was determined to be 1 colony-forming unit /mL and for Brucella it was 1.95 x 10 3 plasmids per microliter. Blood culture in automated blood culture system was negative for all the samples. This prospective study carried out in southern India for the first time. PCR for Brucella was positive in 1% of the patient samples whereas 0.3% was positive for B. pseudomallei. Conclusion: The finding of Brucella and Burkholderia infections in our populations leads us to suggest that tests for Brucella and B. pseudomallei should also form part of a diagnostic platform for patients with Pyrexia of unknown origin in tropical developing countries.
  2,127 12 1
EDITORIAL
State of the Globe: The relationship between male circumcision and genitourinary infections
Ahmed Nasr
January-March 2012, 4(1):1-3
DOI:10.4103/0974-777X.93747  
  1,827 16 -
LETTERS TO EDITOR
Salmonella paratyphi neck abscess
Bijayini Behera, Jagadishwar Goud, A Kamlesh, Yashwant K Thakur
January-March 2012, 4(1):89-89
DOI:10.4103/0974-777X.93770  
  1,503 12 -
Similarity in the isolation rate of Mycobacterium tuberculosis for new and treated cases of tuberculosis in sputum specimens preserved under cetylpyridinium chloride
Philip Raj Abraham, Sanjay M Kasetty, VD Sharma, Channappa T Shivannavar
January-March 2012, 4(1):90-91
DOI:10.4103/0974-777X.93771  
  1,368 16 -
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2008 Journal of Global Infectious Diseases | Published by Wolters Kluwer - Medknow
Online since 10th December, 2008