Browse publications by year: 2013

  1. Singh B, Daneshvar C
    Clin Microbiol Rev, 2013 Apr;26(2):165-84.
    PMID: 23554413 DOI: 10.1128/CMR.00079-12
    Plasmodium knowlesi is a malaria parasite that is found in nature in long-tailed and pig-tailed macaques. Naturally acquired human infections were thought to be extremely rare until a large focus of human infections was reported in 2004 in Sarawak, Malaysian Borneo. Human infections have since been described throughout Southeast Asia, and P. knowlesi is now recognized as the fifth species of Plasmodium causing malaria in humans. The molecular, entomological, and epidemiological data indicate that human infections with P. knowlesi are not newly emergent and that knowlesi malaria is primarily a zoonosis. Human infections were undiagnosed until molecular detection methods that could distinguish P. knowlesi from the morphologically similar human malaria parasite P. malariae became available. P. knowlesi infections cause a spectrum of disease and are potentially fatal, but if detected early enough, infections in humans are readily treatable. In this review on knowlesi malaria, we describe the early studies on P. knowlesi and focus on the epidemiology, diagnosis, clinical aspects, and treatment of knowlesi malaria. We also discuss the gaps in our knowledge and the challenges that lie ahead in studying the epidemiology and pathogenesis of knowlesi malaria and in the prevention and control of this zoonotic infection.
    MeSH terms: Animals; Antimalarials/therapeutic use; Asia, Southeastern/epidemiology; Communicable Disease Control/methods; Disease Reservoirs; Humans; Macaca/parasitology; Malaria/diagnosis*; Malaria/drug therapy; Malaria/epidemiology*; Malaria/pathology; Zoonoses/epidemiology*; Plasmodium knowlesi/isolation & purification*
  2. Wickersham JA, Marcus R, Kamarulzaman A, Zahari MM, Altice FL
    Bull World Health Organ, 2013 Feb 01;91(2):124-9.
    PMID: 23554524 DOI: 10.2471/BLT.12.109132
    PROBLEM: In Malaysia, human immunodeficiency virus (HIV) infection is highly concentrated among people who inject opioids. For this reason, the country undertook a three-phase roll-out of a methadone maintenance treatment (MMT) programme. In Phase 3, described in this paper, MMT was implemented within prisons and retention in care was assessed.

    APPROACH: After developing standard operating procedures and agreement between its Prisons Department and Ministry of Health, Malaysia established pilot MMT programmes in two prisons in the states of Kelantan (2008) and Selangor (2009) - those with the highest proportions of HIV-infected prisoners. Community-based MMT programmes were also established in Malaysia to integrate treatment activities after prisoners' release.

    LOCAL SETTING: Having failed to reduce the incidence of HIV infection, in 2005 Malaysia embarked on a harm reduction strategy.

    RELEVANT CHANGES: STANDARD OPERATING PROCEDURES WERE MODIFIED TO: (i) escalate the dose of methadone more slowly; (ii) provide ongoing education and training for medical and correctional staff and inmates; (iii) increase the duration of methadone treatment before releasing prisoners; (iv) reinforce linkages with community MMT programmes after prisoners' release; (v) screen for and treat tuberculosis; (vi) escalate the dose of methadone during treatment for HIV infection and tuberculosis; and (vii) optimize the daily oral dose of methadone (> 80 mg) before releasing prisoners.

    LESSONS LEARNT: Prison-based MMT programmes can be effectively implemented but require adequate dosing and measures are needed to improve communication between prison and police authorities, prevent police harassment of MMT clients after their release, and improve systems for tracking release dates.

    MeSH terms: Adult; Female; Health Plan Implementation; Humans; Malaysia/epidemiology; Male; Methadone/administration & dosage; Methadone/therapeutic use*; Prisons/trends*; HIV Infections/epidemiology; HIV Infections/prevention & control; HIV Infections/transmission*; Substance Abuse, Intravenous/complications; Substance Abuse, Intravenous/rehabilitation*; Harm Reduction/drug effects; Opiate Substitution Treatment/methods*; Opiate Substitution Treatment/trends
  3. Neo ML, Erftemeijer PL, van Beek JK, van Maren DS, Teo SL, Todd PA
    PLoS One, 2013;8(3):e58819.
    PMID: 23555597 DOI: 10.1371/journal.pone.0058819
    Recruitment constraints on Singapore's dwindling fluted giant clam, Tridacna squamosa, population were studied by modelling fertilisation, larval transport, and settlement using real-time hydrodynamic forcing combined with knowledge of spawning characteristics, larval development, behaviour, and settlement cues. Larval transport was simulated using a finite-volume advection-diffusion model coupled to a three-dimensional hydrodynamic model. Three recruitment constraint hypotheses were tested: 1) there is limited connectivity between Singapore's reefs and other reefs in the region, 2) there is limited exchange within Singapore's Southern Islands, and 3) there exist low-density constraints to fertilisation efficacy (component Allee effects). Results showed that connectivity among giant clam populations was primarily determined by residual hydrodynamic flows and spawning time, with greatest chances of successful settlement occurring when spawning and subsequent larval dispersal coincided with the period of lowest residual flow. Simulations suggested poor larval transport from reefs located along the Peninsular Malaysia to Singapore, probably due to strong surface currents between the Andaman Sea and South China Sea combined with a major land barrier disrupting larval movement among reefs. The model, however, predicted offshore coral reefs to the southeast of Singapore (Bintan and Batam) may represent a significant source of larvae. Larval exchange within Singapore's Southern Islands varied substantially depending on the locations of source and sink reefs as well as spawning time; but all simulations resulted in low settler densities (2.1-68.6 settled individuals per 10,000 m(2)). Poor fertilisation rates predicted by the model indicate that the low density and scattered distribution of the remaining T. squamosa in Singapore are likely to significantly inhibit any natural recovery of local stocks.
    MeSH terms: Animals; Geography; Models, Theoretical*; Oceans and Seas; Population Density; Population Dynamics; Singapore; Ecosystem; Bivalvia*; Hydrodynamics; Coral Reefs; Islands
  4. Kuldas S, Ismail HN, Hashim S, Bakar ZA
    Springerplus, 2013 Dec;2(1):105.
    PMID: 23556145 DOI: 10.1186/2193-1801-2-105
    This review aims to provide an insight into human learning processes by examining the role of cognitive and emotional unconscious processing in mentally integrating visual and verbal instructional materials. Reviewed literature shows that conscious mental integration does not happen all the time, nor does it necessarily result in optimal learning. Students of all ages and levels of experience cannot always have conscious awareness, control, and the intention to learn or promptly and continually organize perceptual, cognitive, and emotional processes of learning. This review suggests considering the role of unconscious learning processes to enhance the understanding of how students form or activate mental associations between verbal and pictorial information. The understanding would assist in presenting students with spatially-integrated verbal and pictorial instructional materials as a way of facilitating mental integration and improving teaching and learning performance.
  5. Sim MS, Hatim A, Reynolds GP, Mohamed Z
    Pharmacogenomics, 2013 Apr;14(5):505-14.
    PMID: 23556448 DOI: 10.2217/pgs.13.25
    FAAH is a membrane enzyme that terminates the activity of a large class of endogenous signaling lipids. Recent studies suggest that the FAAH Pro129Thr polymorphism is a common mutation in the FAAH gene that is significantly associated with drug-addictive traits. This study investigated the association of the Pro129Thr polymorphism of the FAAH gene with methamphetamine dependence, methamphetamine-induced psychosis, manic episodes and panic disorder in a Malaysian population.
    MeSH terms: Adult; Amidohydrolases/genetics*; Humans; Male; Methamphetamine/administration & dosage; Methamphetamine/adverse effects*; Phenotype; Polymorphism, Genetic; Psychoses, Substance-Induced/genetics; Case-Control Studies; Panic Disorder/chemically induced; Panic Disorder/genetics; Substance-Related Disorders/genetics*; Substance-Related Disorders/pathology; Amphetamine-Related Disorders/genetics; Genetic Predisposition to Disease; Genetic Association Studies*
  6. Hara Y, Chin CY, Mohamed R, Puthucheary SD, Nathan S
    BMC Infect Dis, 2013;13:165.
    PMID: 23556548 DOI: 10.1186/1471-2334-13-165
    Burkholderia pseudomallei, the causative agent of melioidosis, is endemic to Southeast Asia and northern Australia. Clinical manifestations of disease are diverse, ranging from chronic infection to acute septicaemia. The current gold standard of diagnosis involves bacterial culture and identification which is time consuming and often too late for early medical intervention. Hence, rapid diagnosis of melioidosis is crucial for the successful management of melioidosis.
    MeSH terms: Adult; Aged; Aged, 80 and over; Antibodies, Bacterial/blood*; Antigens, Bacterial*; Enzyme-Linked Immunosorbent Assay/methods; Female; Humans; Male; Melioidosis/diagnosis*; Middle Aged; Recombinant Proteins; Sensitivity and Specificity; Serologic Tests/methods; Burkholderia pseudomallei/immunology*
  7. Banerjee S, Theesar SJ, Kurths J
    Chaos, 2013 Mar;23(1):013118.
    PMID: 23556955 DOI: 10.1063/1.4791589
    We study generalized variable projective synchronization between two unified time delayed systems with constant and modulated time delays. A novel Krasovskii-Lyapunov functional is constructed and a generalized sufficient condition for synchronization is derived analytically using the Lyapunov stability theory and adaptive techniques. The proposed scheme is valid for a system of n-numbers of first order delay differential equations. Finally, a new neural oscillator is considered as a numerical example to show the effectiveness of the proposed scheme.
    MeSH terms: Communication; Computer Simulation; Feasibility Studies; Information Theory*; Numerical Analysis, Computer-Assisted; Oscillometry; Periodicity*; Time Factors; Neural Networks (Computer); Nonlinear Dynamics*
  8. Amal MN, Zamri-Saad M, Siti-Zahrah A, Zulkafli AR, Nur-Nazifah M
    J Appl Microbiol, 2013 Jul;115(1):20-9.
    PMID: 23557382 DOI: 10.1111/jam.12210
    AIMS: The aim of this study was to characterize Streptococcus agalactiae strains that were isolated from fishes in Malaysia using random amplified polymorphic DNA (RAPD) and repetitive extragenic palindromic PCR (REP-PCR) techniques.

    METHODS AND RESULTS: A total of 181 strains of Strep. agalactiae isolated from red hybrid tilapia (Oreochromis sp.) and golden pompano (Trachinotus blochii) were characterized using RAPD and REP-PCR techniques. Both the fingerprinting techniques generated reproducible band patterns, differing in the number and molecular mass amplicons. The RAPD technique displayed greater discriminatory power by its production of more complex binding pattern and divided all the strains into 13 groups, compared to 9 by REP-PCR technique. Both techniques showed the availability to differentiate the genetic profiles of the strains according to their geographical location of origin. Three strains of Strep. agalactiae that were recovered from golden pompano showed a genetic dissimilarity from the strains isolated from red hybrid tilapia, while the strain of ATCC 27956 that recovered from bovine displayed a unique profile for both methods.

    CONCLUSIONS: Both techniques possess excellent discriminative capabilities and can be used as a rapid means of comparing Strep. agalactiae strains for future epidemiological investigation.

    SIGNIFICANCE AND IMPACT OF THE STUDY: Framework as the guideline in traceability of this disease and in the search for potential local vaccine candidates for streptococcosis in this country.

    MeSH terms: Animals; Cattle; Fishes/microbiology*; Malaysia; Streptococcus agalactiae/classification; Streptococcus agalactiae/genetics*; Streptococcus agalactiae/isolation & purification; Genetic Variation; Bacterial Typing Techniques/methods; Polymerase Chain Reaction/methods*; DNA Fingerprinting/methods; Random Amplified Polymorphic DNA Technique/methods*
  9. Zakaria SM, Sharif Zein SH, Othman MR, Yang F, Jansen JA
    Tissue Eng Part B Rev, 2013 Oct;19(5):431-41.
    PMID: 23557483 DOI: 10.1089/ten.TEB.2012.0624
    Hydroxyapatite is a biocompatible material that is extensively used in the replacement and regeneration of bone material. In nature, nanostructured hydroxyapatite is the main component present in hard body tissues. Hence, the state of the art in nanotechnology can be exploited to synthesize nanophase hydroxyapatite that has similar properties with natural hydroxyapatite. Sustainable methods to mass-produce synthetic hydroxyapatite nanoparticles are being developed to meet the increasing demand for these materials and to further develop the progress made in hard tissue regeneration, especially for orthopedic and dental applications. This article reviews the current developments in nanophase hydroxyapatite through various manufacturing techniques and modifications.
    MeSH terms: Animals; Bone Regeneration*; Humans; Durapatite/chemistry*; Bone Substitutes/chemistry*; Tissue Engineering/methods*; Tissue Engineering/trends; Nanoparticles/chemistry*
  10. Wei CT, Al-Hassan FM, Naim N, Knight A, Joshi SR
    Asian J Transfus Sci, 2013 Jan;7(1):26-8.
    PMID: 23559760 DOI: 10.4103/0973-6247.106725
    Diego blood group antigen, Di(a), is very rare among Caucasians and Blacks, but relatively common among the South American Indians and Asians of Mongolian origin. The antibody to Di(a) is clinically significant to cause hemolytic disease in a new-born or hemolytic transfusion reaction.
  11. Usman AS, Mustaffa R, Ramli N, Diggi SA
    Asian J Transfus Sci, 2013 Jan;7(1):84-5.
    PMID: 23559775 DOI: 10.4103/0973-6247.106750
    OBJECTIVE: Maternal allo-antibody production is stimulated when fetal red blood cells are positive for an antigen absent on the mother's red cells. The maternal IgG antibodies produced will pass through the placenta and attack fetal red cells carrying the corresponding antigen. Allo-immune hemolytic disease of the fetus and newborn caused by anti-E rarely occurs.

    CASE SUMMARY: We report two cases of anti-E hemolytic diseases in neonates. One of the neonates had severe hemolysis presenting with severe anemia, thrombocytopenia, and conjugated hyperbilirubinemia, while the other had moderate anemia and unconjugated hyperbilrubinemia. Although both the neonates were treated by phototherapy and intravenous immunoglobulin, one of them received double volume exchange transfusion.

    CONCLUSION: There appeared to be an increase in the occurrence of hemolytic disease of the fetus and newborn caused by Rh antibodies other than anti-D. In this case report, both patients presented with anemia and hyperbilirubinemia but were successfully treated, with a favorable outcome.

    MeSH terms: Anemia; Antibody Formation; Erythrocytes; Exchange Transfusion, Whole Blood; Female; Fetus; Hemolysis; Humans; Hyperbilirubinemia; Infant, Newborn; Isoantibodies; Mothers; Phototherapy; Placenta; Pregnancy; Thrombocytopenia; Immunoglobulins, Intravenous; Rho(D) Immune Globulin
  12. Khalid R, Nawawi MK, Kawsar LA, Ghani NA, Kamil AA, Mustafa A
    PLoS One, 2013;8(4):e58402.
    PMID: 23560037 DOI: 10.1371/journal.pone.0058402
    M/G/C/C state dependent queuing networks consider service rates as a function of the number of residing entities (e.g., pedestrians, vehicles, and products). However, modeling such dynamic rates is not supported in modern Discrete Simulation System (DES) software. We designed an approach to cater this limitation and used it to construct the M/G/C/C state-dependent queuing model in Arena software. Using the model, we have evaluated and analyzed the impacts of various arrival rates to the throughput, the blocking probability, the expected service time and the expected number of entities in a complex network topology. Results indicated that there is a range of arrival rates for each network where the simulation results fluctuate drastically across replications and this causes the simulation results and analytical results exhibit discrepancies. Detail results that show how tally the simulation results and the analytical results in both abstract and graphical forms and some scientific justifications for these have been documented and discussed.
    MeSH terms: Computer Simulation; Humans; Markov Chains; Software*; Models, Statistical*; Efficiency, Organizational/statistics & numerical data*
  13. Kassim NK, Rahmani M, Ismail A, Sukari MA, Ee GC, Nasir NM, et al.
    Food Chem, 2013 Aug 15;139(1-4):87-92.
    PMID: 23561082 DOI: 10.1016/j.foodchem.2013.01.108
    The ethyl acetate and methanol bark extracts of Melicope glabra were evaluated for their antioxidant capacities by 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging activity and β-carotene bleaching/linoleic acid system. Both extracts exhibited strong inhibition against the DPPH radical (IC50 values of 24.81 and 13.01 μg ml(-1), respectively) and strong antioxidant activity in β-carotene bleaching assay. Both samples were found to have high phenolic content with values of 39 and 44 mg GAE/g as indicated by Follin-Ciocalteau's reagent. Antioxidant TLC assay-guided isolation on the methanol extract led to the isolation of a new pyranocoumarin, glabranin (1), umbelliferone (2), scopoletin (3) and sesamin (4), and their structures were determined by spectroscopy. Compounds (1-3) showed significant activities on DPPH free radical with the IC50 of 240.20, 810.02 and 413.19 μg ml(-1), respectively. However, in β-carotene bleaching assay, sesamin (4) showed higher inhibitory activity (1 mg ml(-1), 95%) than glabranin (1) (1 mg ml(-1), 74%), whilst umbelliferone (2) and scopoletin (3) were slightly pro-oxidant.
    MeSH terms: Antioxidants/isolation & purification; Antioxidants/chemistry*; Chromatography, Thin Layer; Coumarins/isolation & purification; Coumarins/chemistry*; Plant Extracts/isolation & purification; Plant Extracts/chemistry*; Molecular Structure; Lignans/isolation & purification; Lignans/chemistry*; Rutaceae/chemistry*
  14. Zare D, Muhammad K, Bejo MH, Ghazali HM
    Food Chem, 2013 Aug 15;139(1-4):320-5.
    PMID: 23561112 DOI: 10.1016/j.foodchem.2012.12.040
    Histamine, putrescine cadaverine and cis-urocanic acid (UCA) have all been implicated or suggested in scombroid fish poisoning. However, there is little information on UCA especially during storage. Changes in their contents during storage of whole Indian mackerel at 0, 3±1, 10±1 for up to 15 days and 23±2°C for up to 2 days were monitored. Fresh muscles contained 14.83 mg/kg trans-UCA, 2.23 mg/kg cis-UCA and 1.86 mg/kg cadaverine. Histamine and putrescine were not detected. After 15 days at 0 and 3°C, trans-UCA content increased to 52.83 and 189.51 mg/kg, respectively, and decreased to <2 mg/kg at the other two temperatures. Storage at 10°C also resulted in an increase in trans-UCA after 3 days, only to decrease after 6 days. The concentration of cis-UCA increased nearly 13-fold after 15 days at 0 and 3°C, decreased at 10°C and remained unchanged at 23°C. Histamine, putrescine and cadaverine levels increased significantly (P value<0.05) at all temperatures especially at 23°C.
    MeSH terms: Animals; Cadaverine/analysis*; Histamine/analysis*; Perciformes*; Putrescine/analysis*; Temperature; Urocanic Acid/analysis*; Seafood/analysis*; Food Storage/methods*
  15. Ho LH, Abdul Aziz NA, Azahari B
    Food Chem, 2013 Aug 15;139(1-4):532-9.
    PMID: 23561142 DOI: 10.1016/j.foodchem.2013.01.039
    The physico-chemical and sensorial properties of the control (BCtr), commercial wheat flour (CWF) bread substituted with 10% BPF (banana pseudo-stem flour) (B10BPF) and B10BPF with added 0.8% w/w (flour weight basis) xanthan gum (XG) or sodium carboxymethylcellulose (CMC) (B10BPFXG and B10BPFCMC, respectively) were examined. The proximate analyses revealed that the composite bread had significantly higher moisture, ash, crude fibre, soluble, insoluble and total dietary fibre contents but lower protein, fat and carbohydrate contents than the BCtr. Bread incorporated with BPF resulted in a lower volume, darker crumb and lighter crust colour than the BCtr. The addition of CMC improved the bread volume. All breads containing BPF had greater total phenolics, and antioxidant properties than the control bread. Sensory evaluation indicated that the B10BPFCMC bread had the highest acceptability.
    MeSH terms: Antioxidants/analysis; Bread/analysis*; Flour/analysis*; Food Handling/methods*; Humans; Nutritive Value; Taste; Triticum/chemistry*; Musa/chemistry*
  16. Saadati N, Abdullah MP, Zakaria Z, Sany SB, Rezayi M, Hassonizadeh H
    Chem Cent J, 2013;7(1):63.
    PMID: 23561579 DOI: 10.1186/1752-153X-7-63
    Reliable values for method validity of organochlorine pesticides determination were investigated, in water by solid phase extraction and in sediment by Soxhlet extraction, followed by gas chromatography equipped with an electron capture detector. Organochlorine pesticides are categorized as Persistent Organic Pollutants. Hence, critical decisions to control exposure to these chemicals in the environment are based on their levels in different media; it is important to find valid qualitative and quantitative results for these components. In analytical chemistry, internal quality procedures are applied to produce valid logical results.
  17. Jayasimhan S, Yap NY, Roest Y, Rajandram R, Chin KF
    Clin Nutr, 2013 Dec;32(6):928-34.
    PMID: 23561636 DOI: 10.1016/j.clnu.2013.03.004
    Probiotics is an emerging therapeutic agent which may alleviate the symptoms of constipation. We evaluated the effectiveness of microbial cell preparation (Hexbio(®)) containing fructooligosaccharide, Bifidobacterium and Lactobacillus in improving stool frequency and symptoms of chronic constipation.
    MeSH terms: Adolescent; Adult; Aged; Aged, 80 and over; Bifidobacterium/metabolism; Chronic Disease; Constipation/microbiology*; Constipation/therapy*; Defecation/physiology; Double-Blind Method; Feces/microbiology; Female; Humans; Lactobacillus/metabolism; Male; Middle Aged; Oligosaccharides/administration & dosage; Probiotics/administration & dosage; Young Adult
  18. Lananan F, Jusoh A, Ali N, Lam SS, Endut A
    Bioresour Technol, 2013 Aug;141:75-82.
    PMID: 23562179 DOI: 10.1016/j.biortech.2013.03.006
    A study was performed to determine the effect of Conway and f/2 media on the growth of microalgae genera. Genera of Chlorella sp., Dunaliella sp., Isochrysis sp., Chaetoceros sp., Pavlova sp. and Tetraselmis sp. were isolated from the South China Sea. During the cultivation period, the density of cells were determined using Syringe Liquid Sampler Particle Measuring System (SLS-PMS) that also generated the population distribution curve based on the size of the cells. The population of the microalgae genera is thought to consist of mother and daughter generations since these microalgae genera reproduce by releasing small non-motile reproductive cells (autospores). It was found that the reproduction of Tetraselmis sp., Dunaliella sp. and Pavlova sp. could be sustained longer in f/2 Medium. Higher cell density was achieved by genus Dunaliella, Chlorella and Isochrysis in Conway Medium. Different genera of microalgae had a preference for different types of cultivation media.
    MeSH terms: China; Chlorella/growth & development*; Nitrates/metabolism; Nitrates/chemistry; Oceans and Seas; Population Density; Seawater/chemistry*; Time Factors; Water Purification/methods*; Microalgae/drug effects; Microalgae/growth & development*; Waste Water/chemistry*
  19. Deshpande PS, Kotresha D, Noordin R, Yunus MH, Saadatnia G, Golkar M, et al.
    Rev Inst Med Trop Sao Paulo, 2013 4 9;55(2):79-83.
    PMID: 23563759
    Toxoplasmosis is an important cause of congenital infection. The present study was performed to evaluate the usefulness of recombinant (r) GRA-7 cloned from nucleotides (n) 39-711 in discriminating between acute and chronic toxoplasmosis. First, commercial IgM, IgG and IgG avidity ELISAs were used to determine the serological profile of the sera. Serum samples were from 20 symptomatic patients with acute infection (low IgG avidity, IgM positive), 10 with chronic infection (high IgG avidity, IgM negative) and 10 with indeterminate IgG avidity (IgM positive) which were tested for IgG avidity status with an in-house developed IgG avidity Western blot using the rGRA-7 recombinant antigen. All 20 sera from cases of probable acute infection showed bands which either faded out completely or reduced significantly in intensity after treatment with 8 M urea, whereas the band intensities of the 10 serum samples from chronic cases remained the same. Of the 10 sera with indeterminate IgG avidity status, after treatment with 8 M urea the band intensities with six sera remained the same, two sera had completely faded bands and another two sera had significantly reduced band intensities. Discrimination between acute and chronic toxoplasmosis was successfully performed by the in-house IgG avidity Western blot.
    MeSH terms: Acute Disease; Antibodies, Protozoan/blood*; Antibody Affinity; Chronic Disease; Enzyme-Linked Immunosorbent Assay; Humans; Immunoglobulin G/blood; Nucleotides; Recombinant Proteins/genetics; Sensitivity and Specificity; Toxoplasma/immunology*; Toxoplasmosis/diagnosis*; Blotting, Western; Cloning, Organism
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