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Abbas MA, Ismail AS, Zakaria K, El Shamy AM, El Abedin SZ. Author Correction: Adsorption, thermodynamic, and quantum chemical investigations of an ionic liquid that inhibits corrosion of carbon steel in chloride solutions. Sci Rep 2023; 13:2101. [PMID: 36747040 PMCID: PMC9902463 DOI: 10.1038/s41598-023-28979-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Affiliation(s)
- Mohamed A. Abbas
- grid.454081.c0000 0001 2159 1055Petroleum Applications Department, Egyptian Petroleum Research Institute, Nasr City, P.B. 11727, Cairo, Egypt
| | - Amr S. Ismail
- grid.454081.c0000 0001 2159 1055Petrochemicals Department, Egyptian Petroleum Research Institute, Nasr City, P.B. 11727, Cairo, Egypt
| | - K. Zakaria
- grid.454081.c0000 0001 2159 1055Analysis and Evaluation Department, Egyptian Petroleum Research Institute, Nasr City, P.B. 11727, Cairo, Egypt
| | - A. M. El Shamy
- grid.419725.c0000 0001 2151 8157Electrochemistry and Corrosion Laboratory, Physical Chemistry Department, National Research Centre, Dokki, Cairo, 12622 Egypt
| | - S. Zein El Abedin
- grid.419725.c0000 0001 2151 8157Electrochemistry and Corrosion Laboratory, Physical Chemistry Department, National Research Centre, Dokki, Cairo, 12622 Egypt
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Abbas MA, Ismail AS, Zakaria K, El-Shamy AM, El Abedin SZ. Author Correction: Adsorption, thermodynamic, and quantum chemical investigations of an ionic liquid that inhibits corrosion of carbon steel in chloride solutions. Sci Rep 2022; 12:17029. [PMID: 36220916 PMCID: PMC9553942 DOI: 10.1038/s41598-022-22010-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Mohamed A Abbas
- Petroleum Applications Department, Egyptian Petroleum Research Institute, P.B. 11727, Nasr City, Cairo, Egypt.,Petrochemicals Department, Egyptian Petroleum Research Institute, P.B. 11727, Nasr City, Cairo, Egypt
| | - Amr S Ismail
- Petroleum Applications Department, Egyptian Petroleum Research Institute, P.B. 11727, Nasr City, Cairo, Egypt.,Petrochemicals Department, Egyptian Petroleum Research Institute, P.B. 11727, Nasr City, Cairo, Egypt
| | - K Zakaria
- Petrochemicals Department, Egyptian Petroleum Research Institute, P.B. 11727, Nasr City, Cairo, Egypt.,Analysis and Evaluation Department, Egyptian Petroleum Research Institute, P.B. 11727, Nasr City, Cairo, Egypt
| | - A M El-Shamy
- Electrochemistry and Corrosion Laboratory, Physical Chemistry Department, National Research Centre, Dokki, 12622, Cairo, Egypt.
| | - S Zein El Abedin
- Electrochemistry and Corrosion Laboratory, Physical Chemistry Department, National Research Centre, Dokki, 12622, Cairo, Egypt
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Abbas MA, Ismail AS, Zakaria K, El-Shamy AM, El Abedin SZ. Adsorption, thermodynamic, and quantum chemical investigations of an ionic liquid that inhibits corrosion of carbon steel in chloride solutions. Sci Rep 2022; 12:12536. [PMID: 35869239 PMCID: PMC9307760 DOI: 10.1038/s41598-022-16755-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 07/14/2022] [Indexed: 02/08/2023] Open
Abstract
The purpose of this work lies in the use of ionic liquids as corrosion inhibitors due to the difficulty in some oil fields with the solubility of corrosion inhibitors and these materials can be miscible with water and thus provide a solution to such problems in the industry. The second purpose is concerned with the lower toxicity of these compounds compared with the most common corrosion inhibitors. The study covered the corrosion inhibition performance of the ionic liquid 1-butyl-3-methylimidazolium trifluoromethyl sulfonate ([BMIm]TfO) for carbon steel in 3.5% NaCl solutions. The study comprised electrochemical, adsorption, and quantum chemical investigations. The results manifested that [BMIm]TfO can be considered a promising corrosion inhibitor and the inhibition efficacy intensifies as the concentration rises. The observed inhibitive effect can be correlated to the adsorption of the ionic liquid species and the creation of protecting films on the surface. The mode of adsorption follows the Langmuir adsorption isotherm. The polarization results showed that the ionic liquid [BMIm]TfO functions as a mixed inhibitor. Reliance of the corrosion influence on the temperature in the existence and absence of [BMIm]TfO was demonstrated in the temperature range of 303-333 K using polarization data. Activation parameters were determined and discussed. The observed inhibition performance of [BMIm]TfO was correlated with the electronic properties of the ionic liquid using a quantum chemical study.
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Affiliation(s)
- Mohamed A. Abbas
- grid.454081.c0000 0001 2159 1055Petroleum Applications Department, Egyptian Petroleum Research Institute, P.B. 11727, Nasr City, Cairo Egypt
| | - Amr S. Ismail
- grid.454081.c0000 0001 2159 1055Petrochemicals Department, Egyptian Petroleum Research Institute, P.B. 11727, Nasr City, Cairo Egypt
| | - K. Zakaria
- grid.454081.c0000 0001 2159 1055Analysis and Evaluation Department, Egyptian Petroleum Research Institute, P.B. 11727, Nasr City, Cairo Egypt
| | - A. M. El-Shamy
- grid.419725.c0000 0001 2151 8157Electrochemistry and Corrosion Laboratory, Physical Chemistry Department, National Research Centre, Dokki, 12622 Cairo Egypt
| | - S. Zein El Abedin
- grid.419725.c0000 0001 2151 8157Electrochemistry and Corrosion Laboratory, Physical Chemistry Department, National Research Centre, Dokki, 12622 Cairo Egypt
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Ismail AS, Tawfik SM, Mady AH, Lee YI. Preparation, Properties, and Microbial Impact of Tungsten (VI) Oxide and Zinc (II) Oxide Nanoparticles Enriched Polyethylene Sebacate Nanocomposites. Polymers (Basel) 2021; 13:polym13050718. [PMID: 33652902 PMCID: PMC7956248 DOI: 10.3390/polym13050718] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 02/21/2021] [Accepted: 02/22/2021] [Indexed: 11/16/2022] Open
Abstract
Nanoparticles of tungsten oxide (WO3) and zinc oxide (ZnO) enriched polyethylene sebacate (PES) nanocomposites were prepared through the coprecipitation process and condensation polymerization reaction. The obtained nano-sized particles of WO3 and ZnO, PES, and nanocomposites (WO3-PES NC and ZnO-PES NC) were investigated. The average molecular weight of the cured PES was measured by employing the gel permeation chromatography (GPC) technique. Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) spectra assured the formation of the polymeric nanocomposites.WO3 and ZnO nanoparticles supposed a condensed porous spherical phase found implanted in the polymer structure, as detected by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) methods. These nano-scale systems achieved an electrical activity based on the conductive nanoparticles embedded matrix as a result of the ion-ion interactions. The microbial influence of the nanocomposites was examined against pathogenic bacteria; Pseudomonas aeruginosa,Escherichia coli, Staphylococcus aureus, and Bacillus subtilis, and Fungi; Aspergillus niger, and Candidaalbicans. Results exhibited that these nanocomposites have antimicrobial effects from moderate to slightly high on bacteria and high on fungi which was confirmed by a clear zone of inhibition. This study contributes to the design of reasonable composites to be under evaluation for their catalytic effect.
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Affiliation(s)
- Amr S. Ismail
- Petrochemicals Department, Egyptian Petroleum Research Institute (EPRI), Nasr City 11727, Cairo, Egypt; (S.M.T.); (A.H.M.)
- Correspondence: (A.S.I.); (Y.-I.L.)
| | - Salah M. Tawfik
- Petrochemicals Department, Egyptian Petroleum Research Institute (EPRI), Nasr City 11727, Cairo, Egypt; (S.M.T.); (A.H.M.)
| | - Amr H. Mady
- Petrochemicals Department, Egyptian Petroleum Research Institute (EPRI), Nasr City 11727, Cairo, Egypt; (S.M.T.); (A.H.M.)
| | - Yong-Ill Lee
- Department of Chemistry, Changwon National University (CNU), Changwon 51140, Korea
- Correspondence: (A.S.I.); (Y.-I.L.)
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Alanazi HO, Abdullah AH, Qureshi KN, Ismail AS. Accurate and dynamic predictive model for better prediction in medicine and healthcare. Ir J Med Sci 2017; 187:501-513. [PMID: 28756541 DOI: 10.1007/s11845-017-1655-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 07/04/2017] [Indexed: 12/11/2022]
Abstract
INTRODUCTION Information and communication technologies (ICTs) have changed the trend into new integrated operations and methods in all fields of life. The health sector has also adopted new technologies to improve the systems and provide better services to customers. Predictive models in health care are also influenced from new technologies to predict the different disease outcomes. However, still, existing predictive models have suffered from some limitations in terms of predictive outcomes performance. AIMS AND OBJECTIVES In order to improve predictive model performance, this paper proposed a predictive model by classifying the disease predictions into different categories. To achieve this model performance, this paper uses traumatic brain injury (TBI) datasets. TBI is one of the serious diseases worldwide and needs more attention due to its seriousness and serious impacts on human life. CONCLUSION The proposed predictive model improves the predictive performance of TBI. The TBI data set is developed and approved by neurologists to set its features. The experiment results show that the proposed model has achieved significant results including accuracy, sensitivity, and specificity.
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Affiliation(s)
- H O Alanazi
- Faculty of Computing, Universiti Teknologi Malaysia, Johor Bahru, Malaysia.,Department of Medical Science Technology, Faculty of Applied Medical Science, Majmaah University, Al Majmaah, Kingdom of Saudi Arabia
| | - A H Abdullah
- Faculty of Computing, Universiti Teknologi Malaysia, Johor Bahru, Malaysia
| | - K N Qureshi
- Department of Computer Science, Bahria University Islamabad, Islamabad, Pakistan.
| | - A S Ismail
- Faculty of Computing, Universiti Teknologi Malaysia, Johor Bahru, Malaysia
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Ismail AS, Grem JL. Thymidylate synthase inhibitors. CANCER CHEMOTHERAPY AND BIOLOGICAL RESPONSE MODIFIERS 2002; 19:1-19. [PMID: 11686010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Affiliation(s)
- A S Ismail
- NCI-Medicine Branch, National Naval Medical Center, 8901 Wisconsin Ave., Bldg. 8, Rm 5101, Bethesda, MD 20889-5105, USA
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Grem JL, Quinn M, Ismail AS, Takimoto CH, Lush R, Liewehr DJ, Steinberg SM, Balis FM, Chen AP, Monahan BP, Harold N, Corse W, Pang J, Murphy RF, Allegra CJ, Hamilton JM. Pharmacokinetics and pharmacodynamic effects of 5-fluorouracil given as a one-hour intravenous infusion. Cancer Chemother Pharmacol 2001; 47:117-25. [PMID: 11269737 DOI: 10.1007/s002800000189] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
PURPOSE Clinical toxicity associated with 5-fluorouracil (5-FU) is related to the area under the plasma concentration-time curve (AUC). Recently, short-term infusions of 5-FU given over 30 or 60 min have been substituted for conventional "bolus" 5-FU given over 3-5 min in randomized clinical trials, but there are only limited pharmacokinetic data for these altered infusion durations. We therefore wished to determine the pharmacokinetics and toxicity associated with 5-FU given as a 1-h intravenous (i.v.) infusion. METHODS A group of 22 adults with advanced gastrointestinal tract cancers and no prior systemic chemotherapy for advanced disease received interferon alpha-2a (5 MU/m2 s.c., days 1-7), leucovorin (500 mg/m2 i.v. over 30 min, days 2-6) and 5-FU (370 mg/m2 i.v. over 1 h, days 2-6). The doses of 5-FU and interferon-alpha were adjusted according to individual tolerance. The pharmacokinetics and clinical toxicity were retrospectively compared with patients receiving the same regimen under the same treatment guidelines except that 5-FU was given over 5 min. RESULTS The regimen was well tolerated, and 41% of the patients tolerated 5-FU dose escalations to 425-560 mg/m2 per day. Grade 3 or worse diarrhea and fatigue ultimately occurred in 14% of the patients each. Granulocytopenia, mucositis, and diarrhea appeared to be appreciably milder in the present trial compared with our prior phase II experience in colorectal cancer. The peak 5-FU plasma levels and AUC with 370 mg/m2 5-FU given over 1 h were 7.3-fold and 2.4-fold lower than previously measured in 31 patients who received 5-FU over 5 min. CONCLUSION Increasing the length of 5-FU infusion to 1 h seemed to substantially reduce the clinical toxicity with this modulated 5-FU regimen, likely due to markedly lower peak 5-FU plasma levels and AUC. Changes in the duration of a short infusion of 5-FU clearly affects the clinical toxicity, but raises the concern of a potentially adverse impact on its antitumor activity. These results suggest the importance of including precise guidelines concerning the time over which 5-FU is given in clinical trials. Having a specified duration of 5-FU infusion is also important if 5-FU dose escalation is considered.
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Affiliation(s)
- J L Grem
- National Cancer Institute-Medicine Branch, National Naval Medical Center, Bethesda, MD 20889, USA.
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Guemei AA, Cottrell J, Band R, Hehman H, Prudhomme M, Pavlov MV, Grem JL, Ismail AS, Bowen D, Taylor RE, Takimoto CH. Human plasma carboxylesterase and butyrylcholinesterase enzyme activity: correlations with SN-38 pharmacokinetics during a prolonged infusion of irinotecan. Cancer Chemother Pharmacol 2001; 47:283-90. [PMID: 11345644 DOI: 10.1007/s002800000258] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE To characterize the relationships between human plasma irinotecan carboxylesterase-converting enzyme activity, caboxylesterase-mediated hydrolysis of p-nitrophenyl acetate (pNPA), and the butyrylcholinesterase-mediated hydrolysis of butyrylthiocholine in human plasma and to test the ability of these in vitro tests to predict the variability in SN-38 pharmacokinetics in adult patients during a prolonged infusion of irinotecan. METHODS Individual plasma-converting enzyme activity was measured in 20 adult cancer patients participating in a pharmacokinetic and phase I clinical trial of a prolonged 96-h intravenous infusion of irinotecan. The pNPA and butyrylthiocholine hydrolysis in patient plasma was also assayed. RESULTS The irinotecan carboxylesterase-converting enzyme in human plasma had a Vmax of 89.9 +/- 22.7 pmol/h per ml plasma and a Km of 207 +/- 56 microM (mean +/- SD, n = 3). The mean value of the specific activity of this enzyme in 20 adult cancer patients was 10.08 +/- 2.96 pmol/h per ml plasma ranging from 5.43 to 15.39 pmol/h per ml. The area-under-the-concentration-versus time curve (AUC) ratio of SN-38 to irinotecan (AUCSN-38/AUCCPT-11) was used to assess the relative SN-38 exposure to the active metabolite in individual patients. Pharmacokinetic variations in the relative exposure to SN-38 did not correlate with the measured carboxylesterase-converting enzyme activity nor with plasma butyrylcholinesterase activity in our patient population. However, it did correlate with the measured pNPA hydrolysis activity in patient plasma (r2 = 0.350, P = 0.0124, n = 18). CONCLUSIONS Determination of patient plasma pNPA hydrolysis activity may have utility in predicting SN-38 pharmacokinetics during prolonged infusions of irinotecan.
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Affiliation(s)
- A A Guemei
- Developmental Therapeutics Department, Medicine Branch, Division of Clinical Sciences, National Cancer Institute, Bethesda, MD 20889, USA
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Takimoto CH, Morrison G, Harold N, Quinn M, Monahan BP, Band RA, Cottrell J, Guemei A, Llorens V, Hehman H, Ismail AS, Flemming D, Gosky DM, Hirota H, Berger SJ, Berger NA, Chen AP, Shapiro JD, Arbuck SG, Wright J, Hamilton JM, Allegra CJ, Grem JL. Phase I and pharmacologic study of irinotecan administered as a 96-hour infusion weekly to adult cancer patients. J Clin Oncol 2000; 18:659-67. [PMID: 10653882 DOI: 10.1200/jco.2000.18.3.659] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
PURPOSE We conducted a phase I and pharmacologic study of a weekly 96-hour infusion of irinotecan to determine the maximum-tolerated dose, define the toxicity profile, and characterize the clinical pharmacology of irinotecan and its metabolites. PATIENTS AND METHODS In 26 adult patients with solid tumors, the duration and dose rate of infusion were escalated in new patients until toxicity was observed. RESULTS In 11 patients who were treated with irinotecan at 12.5 mg/m(2)/d for 4 days weekly for 2 of 3 weeks, dose-limiting grade 3 diarrhea occurred in three patients and grade 3 thrombocytopenia occurred in two patients. The recommended phase II dose is 10 mg/m(2)/d for 4 days given weekly for 2 of 3 weeks. At this dose, the steady-state plasma concentration (Css) of total SN-38 (the active metabolite of irinotecan) was 6.42 +/- 1.10 nmol/L, and the Css of total irinotecan was 28.60 +/- 17.78 nmol/L. No patient experienced grade 3 or 4 neutropenia during any cycle. All other toxicities were mild to moderate. The systemic exposure to SN-38 relative to irinotecan was greater than anticipated, with a molar ratio of the area under the concentration curve (AUC) of SN-38 to irinotecan of 0.24 +/- 0.08. One objective response lasting 12 months in duration was observed in a patient with metastatic colon cancer. CONCLUSION The recommended phase II dose of irinotecan of 10 mg/m(2)/d for 4 days weekly for 2 of 3 weeks was extremely well tolerated. Further efficacy testing of this pharmacologic strategy of administering intermittent low doses of irinotecan is warranted.
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Affiliation(s)
- C H Takimoto
- Developmental Therapeutics Department, Medicine Branch, Division of Clinical Sciences, and Investigational Drug Branch, Cancer Therapy Evaluation Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, Bethesda, MD, USA
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Abstract
The crude fibrinolytic enzyme preparation from Fusarium oxysporum N.R.C.1 was purified into two enzymes by ammonium sulphate precipitation followed by chromatography on Sephadex G-100 and DEAE-cellulose. Both fibrinolytic enzymes were more active on human than on bovine fibrin. The activity of the "major" enzyme component on human fibrin was 72-fold that of the "minor" enzyme component. Both enzymes had the same temperature (37 degrees C) and pH (6.98) optima. The "minor" enzyme component was more stable than the "major" one against heat and pH treatments. Both enzymes were significantly activated with Co2+ and inhibited with EDTA.
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Affiliation(s)
- A F Abdel-Fattah
- Department of Natural and Microbial Products Chemistry, National Research Centre, Dokki-Cairo, Egypt
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Abdel-Fattah AF, Ismail AS. Production of proteolytic enzymes with special reference to fibrinolytic enzymes by fungi. Microbiol Esp 1983; 36:59-64. [PMID: 6379376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Schmatz HD, Krauss H, Viertel P, Ismail AS, Hussein AA. [Seroepidemiological investigations in domestic ruminants from Egypt, Somalia and Jordan for the demonstration of complement fixing antibodies against Rickettsia and Chlamydia (author's transl)]. Acta Trop 1978; 35:101-11. [PMID: 28651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
1450 random serum samples of domestic ruminants from Egypt, Somalia and Jordan were investigated for complement fixing antibodies against Rickettsia and Chlamydia. Between 1.5 and 3.4% of the samples from the animals investigated had antibodies against the RMSF-group of Rickettsia, with exception of the sera from Somalian cattle and sheep from Jordan. Antibodies against Rickettsia of the Typhus-group were found in 4 cattle and 1 goat from Jordan and 2 sheep from Egypt; by agglutination test with type-specific antigen they were identified as antibodies against R. typhi. Using 2 different antigens, antibodies against Coxiella burnetii were found in every population tested. The prevalence was 2.0 to 12.2%, with the exception of cattle in Somalia, where only 1 positive serum (0.2%) was found. 27% of the serum samples from Jordan and 22% from Egypt but none of the 802 samples from Somalia had antibodies against Chlamydia. The results are discussed under an epidemiological point of view.
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Ismail AS, Krauss H, Geissler H. [Demonstration of group-specific precipitation antibodies in Chlamydia infections of poultry]. Berl Munch Tierarztl Wochenschr 1975; 88:21-4. [PMID: 1131157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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