Showing 17 results for Elisa
A Moradi,, A Ahmadi, S Bakhshandeh-Nosrat, E Sanee- Moghaddam, M Saeedi,
Volume 1, Issue 1 (4-2007)
Abstract
Abstract Background and objectives: HTLV-1 virus belongs to the retrovirus and infection with this virus mostly is seen among people having more than one time blood transfusion. Because of requiring repeated blood transfusions, thalassemic patients are considered to be high risk subjects in this regard. Thus, this study was carried out to indicate the frequency of HTLV-1 infection among the thalassemic patients. Materials and Methods: Blood samples of 181 thalassemic patients referred to Taleghani hospital during nearly two years (2004-2005) were taken. By using ELISA technique, the sera were assessed to determine HTLV antibody. The positive ones subsequently were examined by western Blot (kit, 2.4) to confirm the ELISA positive samples and also to recognize the HTLV type. Results: Of 181 thalassemic patients, 93 (51.4%) were male. The age was between one and twenty five (14.11 ± 6.5). 93.4% (169) were received packed cell only once in a month. 14.9% (27) were HTLV positive by ELISA technique, while just eight out of these 27 were considered to be true positive by Western blot and to be contaminated by type one virus. Of all subjects, 4.4% were positive HTLV1. Furthermore, the contamination with this virus is increased as the patients getting older. Conclusion: The findings indicated that among the thalassemic patients in Gorgan, there are cases with HTLV-1 whose frequency is correlated with the other part of our country. Consequently, further comprehensive studies are required to identify those infected blood donated to minimize the transmission risk of this infection in the society and in particular among the people receiving blood, such as thalassemic patients. Keywords: HTLV-1 antibody, thalassemic patients, ELISA, western Blood, Gorgan Journal
Kh Kalavi, A Moradi, Ar Ahmadi, Aj Sarikhani, M Bazoori, Mr Kyaee,
Volume 2, Issue 1 (4-2008)
Abstract
Abstract Background and objectives: Human T-Lymphocyte Virus-1 (HTLV- 1) is known as the etiologic factor of acute T-Lymphocytic Leukemia (ATL) and tropical spastic paralysis. (TSP). Endemic factors causing infection with Human T Lymphocyte Virus-1 (HTLV-1) is based on environmental, socio-economical and health behaviors of the individuals. This virus is well distributed in families with involved members. Golestan province is located in North West part of Northern Khorasan province that had already been known as an endemic area for HTLV-1. This virus is also known as the main etiologic factor for cancers and ATL, therefore we studied the prevalence of HTLV-1 seroepidemiology in Golestan province. Material and Methods: The subjects selected by cluster sampling were 2034 healthy cases residing in different parts of Golestan province. ELISA method using Dia- pro anti HTLV-1 antibody kits was applied for serological assessment. Western Blot (HTLV BLOT 2.4) was used for confirmation purposes. Results: The subjects aged 38.66±16.54 were 2034 healthy persons. Forty-one point seven of these cases were males and the rest females. Based on ELISA method there were15 HTLV-1 positive cases (0.7%). -1. (0.7%) Six out of 15 were confirmed by western blot method (95%, CI: 0.06-0.53%). The highest prevalence sigllificant) aiology is in the highat rate in 31-40 year old gro0.7%). onclusion: This study shows that HTLV-1 is prevalent in Golestan the same as the other parts of the world. There fere: we urse on performing screening test (HTLV-) on donated blood components before delivering (OK labeling). Key words: HTLV-1, Seroepidemiology, ELISA, Western Blot, Golestan ATL(Acute T lymphocytic Leukemia) Six cases out of 15 were confirmed by western blot method (95%, CI: 0.06-0.53%). The highest prevalence was 2.6% seen in Kalaleh city (east part of the province) [95%, Cl: 0.06-0.53%). There was significant difference between the prevalence of HTLV-1 and the dwelling place. (p=002). HTLV-1 seroepidemiology was in the highest rate in 31-40 year old group (0.7%). Conclusion: This study shows that HTLV-1 is prevalent in Golestan province, the same as the other parts of the world. Therefore, we recommend performing screening test (HTLV-) on donated blood components before delivering (OK labeling). Key words: HTLV-1, Seroepidemiology, ELISA, Western Blot, Golestan province, ATL (Acute T lymphocytic Leukemia)
A Ghazavi, M Khaki, N Mosakhani,
Volume 3, Issue 1 (4-2009)
Abstract
Abstract Background and objectives: Since Rubella is an infectious disease with a few clinical symptoms, it is hardly diagnosed. Especially in the first trimester of pregnancy, congenital rubella is one of the major causes of neonatal mortality and permanent disablement in children. The aim of this study was to determine the sero immunity Level of The single Female student's after national rubella vaccination program in Iran. Material and Methods: This descriptive seroepidemiologic study was conducted on 129 single medical students. After taking written consent form, blood Sample was drawn. The anti-rubella IgG titer was evaluated using ELISA method. Statistical analysis was performed using SPSS (version10). Results: All Subjects had protective titer of anti-rubella antibodies. One hundred and eighteen students (91.5%) were immunized by taking rubella vaccine in the national vaccination program and only 11(8.5%) students reported that they suffered from natural rubella infection in the past. Conclusion: Based on the results of our study, vaccination against rubella in national vaccination program along with natural immunity caused by natural rubella infection in children could produce a protective immunity against rubella. Key words: Rubella, ELISA, vaccination, medical students
A Choupani, Z Rostami, Aa, A Abdullahi,
Volume 7, Issue 1 (4-2013)
Abstract
Abstract
Background and Objective: Helicobacterpylorus is the major cause ofinflammation andulcer instomach, and immunoglobulin IgG is one of the antibodies produced against it, which is important in the course and diagnosis of the previoussufferers. The awareness of the prevalence of this disease can be helpful for the physicians to choose the way of treatment.
Material and Methods: In these cross-sectional study, 516patients referred to laboratory was studied. After separating the serum, Antibody Helicobacter pylori IgGtest wasdone by ELISA method.
Results: of 516, 156 (30.2 %) of the patients have a positive result, 51(32.7%) are males and 105 (67.3 %) are females. Positive percent of males (43.5%) is greater than females (26.5%).Over-45-year-old women (9.8 %) have the highest percentage of disease titers.
Conclusion: The percent of positive cases in men is more than that the women. Over-45-year-old women (9.8 %) have the highest percentage of positive case.
Keywords: Helicobacter pylori IgG, Tehran, ELISA
A Ebrahimzadeh, S Mohammadi, T Davoodi, Ar Salimi Khorashad, A Jamshidi,
Volume 7, Issue 3 (10-2013)
Abstract
Abstract
Background and Objective: Toxoplasmosis is one of the most prevalent parasitic infections worldwide. Contamination of pregnant women with toxoplasmosis may cause fetal death, preterm delivery and congenital toxoplasmosis. Due to importance of congenital Toxoplasmosis and the need of further study, this research was accomplished in Zahedan.
Material and Methods: The serum samples (N= 221) were collected from pregnant women referring to reference laboratory of Zahedan in 2011. The IgG and IgM antibody levels against toxoplasmosis were investigated using ELISA method.
Results: Out of all samples, 30.8% are IgG positive and 1.4% are both IgG and IgM positive. There is no significant difference between positive and negative groups using Chi-square tests.
Conclusion: The main part of pregnant women in Zahedan (69.2%) is serologically negative against toxoplasmosis therefore, hygiene education to eliminate risk factors especially during pregnancy period seems to be imperative.
Keywords: ELISA Antibody Pregnancy Toxoplasma Zahedan
H Baharifar,
Volume 7, Issue 4 (1-2014)
Abstract
Abstract
Background and Objective: Magnetic nanobeads have a large surface- area-to-volume ratio, which is used for immobilized antibody. Using nanoparticles could increase the amount of antibodies in surface in comparison to ELISA. We investigated the ability of magnetic nanobeads to evaluate CRP by colorimetric method and compared the results with ELISA.
Material and Methods: This study is an applicable research conducted in Tehran University of Medical Sciences, 2012. The Magnetic nanobeads conjugated by CRP antibodies were used to measure the protein in the concentration of 1-10 ng/ml (ELISA kit levels) and 0.1 – 0.01 ng/ml. After antigen measurement, the results were compared with Mann Whitney test.
Results: The results in concentration of 1-10 ng/ml are not significantly different (p = 0.78). But In concentrations of 0.1-0.01 ng/ml, the difference is significant (p= 0.02).
Conclusion: The ability of Magnetic nanobeads in measurement of low concentration of antigen is 100 times better than ELISA. Thus Magnetic nanobead method is useful for early measurement and can easily be used in clinical laboratory.
Keywords: CRP Magnetic Nanobead ELISA
H Ansarinia, F Zare, H Hadinedoushan,
Volume 7, Issue 5 (2-2014)
Abstract
Abstract
Background and Objective: In our country, the Wright test routinely is used for diagnosing brucellosis. Because of its low sensitivity, the range of false-negative results is high. Therefore, we aimed at comparing Wright and ELISA in the people suspected brucellosis.
Material and Methods: The results of Wright, 2ME, Coombs Wright tests were compared with Anti-Brucella IgG, Anti-Brucella IgM. Of 1183 subjects referred for Wright test, 148 of them were investigated for Coombs Wright and 228 for 2ME Wright. In addition to Wright test for 32 cases, Brucella IgG and IgM classes were also experimented.
Results: Wright test was negative in 95.4% of cases. Of these negative results, 2.3% were positive for Coombs Wright. Eight-point-five percent of the cases were positive for Coombs Wright test and 4.7% for 2ME Wright test. Sixteen cases were negative for both Wright and ELISA. In 8 cases of Wright-negative, ELISA IgM class was positive and IgG class was negative, and in 4 cases of Wright-negative, ELISA IgM was negative and IgG was positive. About 4 cases of Wright-positive, IgM and IgG antibody classes were positive.
Conclusion: Due to the mismatch between the results of Wright agglutination test and ELISA method and with regard to availability, high sensitivity and determining the type of antibody classes in ELISA, it is focused on ELISA method for brucellosis diagnosis.
Keywords: Brucellosis Wright ELISA
M Talkhabifard, M, N Javid, N, A Moradi, A, A Ghaemi, A, A Tabarraei, A,
Volume 8, Issue 5 (1-2015)
Abstract
Abstract Background and Objective: Human Cytomegalovirus (CMV) is an important cause of congenital viral infection that can lead to serious diseases and complications in infants. Application of rapid, sensitive, and specific HCMV detection methods is necessary for congenital infection detection. We aimed to optimize the use of PCR and ELISA for detection of HCMV in infants. Material and Methods: PCR–ELISA was performed by using specific primers and probe for detection of the HCMV glycoprotein B gene. First, the extracted DNA from urine samples and controls were labeled by digoxigenin during DIG-labeling PCR. After that, Biotin-labeled probe captured the DIG-labeled PCR products. The probe-PCR product hybrid is immobilized on a streptavidin-coated Microtiter plate, and detection was confirmed by proxidase-conjugated anti-digoxigenin antibody, and calorimetric substrate. Results: The clinical Human CMV strains isolated from16 patients were detected by this method. The optimized PCR-ELISA method was able to detect less than100 copies of HCMV genome. There was no non-specific reaction. Conclusion: PCR-ELISA can be applied as a sensitive, specific and reliable method for Semi-quantitative CMV detection in clinical samples. Keywords: Cytomegalovirus, Glycoprotein B, PCR-ELISA, Semi-Quantitative
Roohi, Z, Moradi Bidhendi, S, Khaki, P,
Volume 9, Issue 1 (4-2015)
Abstract
Abstract
Background and Objective: Leptospirosis is a zoonosis infectious disease that is prevalent in tropical and subtropical regions and is caused by the pathogenic serovars of leptospires. Hence, we aimed at investigating the prevalence of antibodies against these bacteria in the blood samples of suspected leptospirosis.
Material and Methods: the human serum samples (N = 130) were obtained from patients clinically suspected leptospirosis. The Serum level of IgM antibodies were studied by ELISA kit (PrioCHECK) in Razi Vaccine and Serum Research Institute (Karaj), 2011-2012.
Results: Anti-leptospira IgM class was observed in 21(16%) samples. The relative distribution of the disease was reported in men (80.95%), women (19.04%), and farmers (30.95%) and in 20-40-year group (57.14%). Contact with contaminated water was the most common cause of infection (52.38%) and fever was the most common sign of Leptospirosis (72.2%).
Conclusion: Due to the occurrence of anti-leptospira antibodies in 16% of suspected cases, it is recommended that routine ELISA be done at least in major diagnostic centers.
Keywords: Leptospira, Leptospirosis, Human, ELISA
Y Shamsizadeh , F Roodbari , N Arbab Soleymani ,
Volume 9, Issue 3 (9-2015)
Abstract
Abstract
Background and Objective: West Nile virus (WNV) is a member of the genus Flavivirus that can cause viral infections in human. This study aimed at detecting IgG antibodies against WNV in patients of two cities of Neka and Shiraz.
Material and Methods: the participants were 46 possible WNV case from Neka (13 women and 10 men) and Shiraz (10 women and 13 men). IgG assay was carried out using the Elisa method.
Results: Immune Status Ratio (ISR) in Neka was negative for WNV IgG, but 12 from Shiraz, including 2 women and 10 men, were positive for WNV IgG that was changed from 3.12 to 38.6. Considering ISR, there was significant variation between Neka and Shiraz (p<0.05). In addition, results showed that there was significant variation in WNV infection rate between men (39.19%) and women (13.04%) from Neka and Shiraz cities (p<0.05).
Conclusion: Because Shiraz has hot and semi-dry climate, whereas Neka temperate climate, the results were affected by climate variation. Given the outdoor job of men compared to women, they are exposed to the bite of mosquito vectors that transmit WNV.
Keywords: West Nile Virus; Elisa; IgG Antibody; Iran.
Sakine Tale Hel Abad , Hamid Reza Joshaghani , Mojgan Nejabat , Hadi Rahimzadeh , Farhad Niknejad , Mohammad Reza Kiaie,
Volume 10, Issue 1 (1-2016)
Abstract
ABSTRACT
Background and Objective: Ochratoxin is a fungal toxin produced by Penicillium verrucosum and some Aspergillus species. Ochratoxin is usually found in grains, cereal products and also animal feed of livestock. The aim of this study was to measure the level of Ochratoxin in pasteurized milk samples of Golestan Province, Iran.
Methods: Overall, 38 milk samples were collected from East and West of the Golestan province in accordance with standards 326 and 419 of the Institute of Standards and Industrial Research of Iran. The level of Ochratoxin was measured by ELISA method.
Results: The mean level of Ochratoxin A in 20 raw milk samples collected from the West of the Province was 3.32 ± 3.76 ng/ml. The mean level of Ochratoxin A in 18 raw milk samples collected from the East was 6.02 ± 4.42 ng/ml. Ochratoxin A levels in most samples were higher than the limits established by the European standards.
Conclusion: Based on the results of this study, Ochratoxin level of 84.2% and 52.6% of the samples from the West and East of the province are higher than the allowed limits (2 ng/ml), respectively.
Davoodi Jabber , Reza Norian , Mohammad Jalilvand ,
Volume 11, Issue 2 (3-2017)
Abstract
ABSTRACT
Background and Objectives: Ivermectin is an anti-parasitic medication frequently used in many food-producing animals. This study aimed to investigate the level of ivermectin residue in liver samples collected from slaughterhouses in Qazvin Province, Iran.
Methods: Overall, 88 bovine liver samples were randomly collected and analyzed for detection of ivermectin residues. The samples were analyzed for ivermectin contamination by enzyme-linked immunosorbent assay (ELISA) and high-performance liquid chromatography (HPLC). The samples were extracted using liquid-liquid extraction procedure for the ELISA. Solid phase extraction using a C18 column followed by fluorescence-derivatized with 1-methylimidazole and trifluoroacetic anhydride in acetonitrile were used for the HPLC assay. Recovery values obtained from the HPLC method ranged from 81.3 to 92.5%, with a relative standard deviation of 6.7-12.2%.
Results: First, all samples were screened by the ELISA method. Based on the results, 16 samples (18.2%) contained no detectable levels of Ivermectin residue, while Ivermectin was found in 72 samples (81.8%). In addition, 22 of the positive samples (30.55%) contained high Ivermectin level (>50 ppb). Analysis of the samples by the HPLC method showed that eight samples (9.09%) contained ivermectin levels above the maximum residue limit.
Conclusion: This study demonstrates the presence of different levels of Ivermectin residue in bovine liver samples collected from the Qazvin Province in Iran. Therefore, regulatory authorities should ensure proper withdrawal period before slaughter of the animals.
Keywords: Ivermectin, Cattle, Liver, ELISA, HPLC.
Hiro Memari , Keiwan Ebrahimi Mohammadi , Peiman Esmaeilzadeh,
Volume 11, Issue 5 (9-2017)
Abstract
ABSTRACT
Background and objectives: Contamination of food products with mycotoxins is a public health problem. The International Agency for Research on Cancer has identified mycotoxins as hepatotoxic and carcinogenic agents to humans (Group 1). The Kurdistan Province is the ninth largest producer of wheat in Iran. We aimed to determine the level of contamination with total aflatoxin (TAF), aflatoxin B1 (AFB1) and ochratoxin A (OTA) in 66 wheat samples randomly selected from 11 wheat flour factories in spring and summer.
Methods: The level of toxins was measured by microtiter plate enzyme-linked immunosorbent assay (ELISA) using a microtitre plate ELISA reader and total AF, AFB1 and OTA commercial kits.
Results: Overall, the level of TAF and AFB in 16.67% of the samples exceeded the maximum tolerable limit set by the Institute of Standard and Industrial Research of Iran (ISIRI). However, the level of OTA contamination did not exceed the maximum tolerable limit set by the ISIRI. In addition, the level of TAF, AFB1 and OTA exceeded the maximum tolerable limit set by the EU in 68.18, 90.91 and 36.36% of the samples, respectively. The level of contamination with these mycotoxins differed significantly in spring and summer (P<0.05).
Conclusion: The level of mycotoxin contamination in wheat samples produced in the Kurdistan Province is alarmingly high and appropriate measures should be taken to eliminate the causes of this issue.
KEYWORDS: Aflatoxin, Aflatoxin B1, Ochratoxin A, Wheat, ELISA.
Masood Ghane ,
Volume 12, Issue 1 (1-2018)
Abstract
ABSTRACT
Background and Objectives: Previous studies have demonstrated the relationship between viral infections and risk of developing type 1 diabetes. The aim of this study was to investigate the frequency of Herpes simplex virus (HSV) in patients with type 2 diabetes and healthy control individuals using PCR and ELISA.
Methods: Blood samples were taken from 180 diabetic patients and 187 healthy controls referred to the Pasteur medical laboratory in Tonekabon, in 2016. Human beta-globin gene was used as internal control to ensure extraction accuracy. Specific primers were used for amplification of the UL30 gene. In addition, level of anti-HSV IgG antibody was measured using a commercial ELISA kit (Euroimmun, Germany).
Results: DNA of HSV was found in the samples of 11 patients (6.1%) and five healthy controls (2.7%). In addition, anti-HSV IgG was found in the samples of 117 patients (65%) and 108 healthy controls (57.75%). There was a statistically significant relationship between frequency of anti-HSV IgG and diabetes.
Conclusion: Similar to previous studies, the present study demonstrated a relationship between frequency of HSV infection and type 2 diabetes. However, further studies should be performed to eliminate the effect of other risk factors to help clarify the exact role of viral infections in increasing the risk of diabetes.
Keywords: Diabetes, Herpes Simplex Virus, ELISA, PCR.
Awat Ebrahim, Keiwan Ebrahimi Mohammadi ,
Volume 12, Issue 3 (5-2018)
Abstract
ABSTRACT
Background and Objectives: Local cheese made from raw milk is one of the most commonly consumed dairy products in the world. Mycotoxin contamination of foodstuff and its transmission to consumers are extremely important public health issues. The purpose of this survey was to determine the level of aflatoxin M1 (AFM1) residues in Koupeh cheese, a traditional fermented Iranian cheese produced in spring and summer.
Methods: We randomly collected 48 local cheese samples produced in Mahabad (northwest of Iran) during spring and summer. The level of AFM1 was measured by enzyme-linked immunosorbant assay using commercial kits and a microplate reader.
Results: All samples contained measurable amounts of AFM1. Cow milk cheese samples contained higher level of AFM1 compared to sheep milk cheese samples. The level of AFM1 in the samples from both animals was lower in summer. There was no significant difference between the mean level of AFM1 in summer and spring. Moreover, 33.3% of cow milk cheese samples collected in spring and 16.6% of the samples collected in summer contained toxin levels higher than the maximum allowed concentration set by the European Commission (250 ng/Kg) and by the Institute of Standards and Industrial Research of Iran (200 ng/Kg).
Conclusion: The results of this study show that the level of AFM1in Koupeh cheese is influenced by the livestock type and production season, in a way that the level of contamination is higher in spring.
Keywords: Cheese, Cultured Milk Products, Aflatoxin M1, ELISA.
Afieh Samimi, Oghol Niaz Jorjani, Zohreh Sharifi, Faramarz Koohsar, Khodaberdi Kalavi, Fatemeh Mesgarian, Beniamin Talebi ,
Volume 16, Issue 3 (5-2022)
Abstract
Background and objectives: Cutaneous leishmaniasis is endemic in most areas of Iran, and the diagnosis of its species is essential for controlling the disease. Leishmania major is the causative agent for cutaneous leishmaniasis in humans. Molecular methods are generally more sensitive than microscopic methods. The present study aimed to use a polymerase chain reaction-enzyme linked immunosorbent assay (PCR-ELISA) technique for detecting live L. major from wounds of patients with cutaneous leishmaniasis.
Methods: In the present study, a standard strain of L. major promastigotes was used as the positive control for purification of DNA. The Novy–MacNeal–Nicolle and RPMI-1640 media were used for reproduction of parasites. DNA was isolated from specimens taken from 35 patients with suspected cutaneous leishmaniasis whose disease was confirmed by direct smear method. The PCR-ELISA technique was later applied by using the standard strain, patient specimens, and primers specific for the 18s rRNA.
Results: Out of 35 patients, 17 (48.6%) were male and 18 (51.4%) were female. In addition, 8.6% of the patients lived in the Gonbad-e Kavus County, while all patients had been infected in villages around Gonbad-e Kavus. Of 35 patients with confirmed cutaneous leishmaniasis according to the direct smear method, 31 patients (86.31%) had leishmaniasis based on the PCR method and the PCR-ELISA methods.
Conclusion: Based on the results, the PCR-ELISA method is more sensitive and accurate for detecting L. major.
Mana Zakeri, Elham Alimoradi, Effat Seyyedhashemi, Shayan Marhamati, Vahid Tajari, Hamidreza Joshaghani,
Volume 17, Issue 2 (3-2023)
Abstract
Background and objectives: Systemic lupus erythematosus (SLE) is a chronic autoimmune disease, caused by abnormal innate and adaptive immune responses. Anti-nuclear antibodies (ANA) and anti-double stranded DNA (anti-dsDNA) are reliable biomarkers for diagnosing SLE. Here, we aimed to investigate the serum levels of anti-dsDNA and ANA antibodies, their diagnostic utilities, and their relationship with disease activity and clinical/laboratory manifestations in patients with suspected.
Methods: We evaluated the plasma levels of ANA and anti-dsDNA antibodies in all individuals with suspected SLE (n=668) who had been referred to rheumatology clinics in Gorgan, Iran. The level of antibodies as well as C3, C4, and CH50 were determined using commercially available enzyme-linked immunosorbent assay kits.
Results: The mean level of ANA and anti-dsDNA antibodies differed significantly between the ANA-positive and ANA-negative groups (p<0.001). However, there was no significant difference in the mean values of C3 (p=0.233), C4 (p=0.415, and CH50 (p=0.482) between the two groups. Moreover, there was a significant positive correlation between ANA and anti-dsDNA levels (p<0.001, r=0.50).
Conclusion: Our findings indicate that anti-dsDNA levels are higher in ANA-positive individuals, and there may be a positive correlation between ANA and anti-dsDNA levels. It is recommended to evaluate the diagnostic and prognostic values of ANA and anti-dsDNA antibodies in future studies.
