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PMCID: PMC1740059  PMID: 11600733
2.  Primary polypseudophakia for cataract surgery in hypermetropic eyes: refractive results and long term stability of the implants within the capsular bag 
The British Journal of Ophthalmology  2001;85(10):1198-1202.
AIM—To determine the long term visual and refractive results, and stability and complications of primary polypseudophakia using poly(methylmethacrylate) (PMMA) intraocular lenses (IOLs) for cataract surgery in hypermetropic eyes.
METHODS—Prospective study of 15 short or hypermetropic eyes undergoing phacoemulsification with primary polypseudophakia with two PMMA IOLs implanted within the capsular bag.
RESULTS—The spherical equivalent was reduced from a mean +4.87 (SD 3.00) dioptres (D) to −0.12 (1.40 D), and the deviation from the intended refraction was +0.005 (1.30) D, 23.6 (12.36) months post-implantation. The deviation from intended refraction was not statistically significant (p = 0.989; paired t test). Postoperative best corrected visual acuity (BCVA) was 6/12 or better in all eyes without macular or optic nerve co-morbidity. Interlenticular opacification (ILO) in the form of peripheral Elschnig pearls was seen in four (26.67%) eyes. A new type of ILO in the form of usually pigmented deposits in the central interface developed in five (33.33%) eyes and resulted in the appearance of Newton's rings in three. None of the eyes with ILO had any loss of BCVA or hyperopic shift. Six (40%) eyes were within 1 D from the intended refraction and 14 (93.33%) within 2 D. There was no statistically significant difference in the accuracy of the two intraocular lens calculation formulas used (SRK II and SRK/T).
CONCLUSION—Peripheral Elschnig pearl-type ILO can occur as a late complication of primary in the bag implantation of two PMMA IOLs. A new type of ILO is described. Both types of ILO have not to date resulted in deterioration of visual acuity in our cohort. Use of appropriate biometry techniques and IOL calculation formulas may yield more accurate refractive results.

PMCID: PMC1723740  PMID: 11567964
3.  An unusually aggressive case of endometriosis showing p53 expression 
Journal of Clinical Pathology  2001;54(5):396-398.
A 43 year old woman who underwent a hysterectomy and bilateral salpingo-oophorectomy for secondary dysmenorrhoea was found to have bilateral ovarian endometriosis. During the following four years she developed a series of tumour-like vaginal masses, which were locally excised, a pelvic mass causing acute large bowel obstruction, which necessitated an emergency Hartmann's procedure, and a further pelvic mass causing hydronephrosis with a non-functioning kidney. Pathological examination of all the resected specimens showed endometriosis with abundant stromal and glandular elements. Immunoreactivity for p53 protein was detected within endometriotic foci from the initial oophorectomy as well as the latest resection specimens. Immunostaining for p53 may help identify potentially aggressive cases of endometriosis for proactive treatment.
Key Words: endometriosis • p53 • immunocytochemistry
PMCID: PMC1731432  PMID: 11328841
4.  New challenges facing ill health in Gulf war veterans 
PMCID: PMC1740136  PMID: 11303076
5.  Hsp90 
The Journal of Cell Biology  2001;154(2):267-274.
Hsp90 is unique among molecular chaperones. The majority of its known substrates are signal transduction proteins, and recent work indicates that it uses a novel protein-folding strategy.
PMCID: PMC2150759  PMID: 11470816
Hsp90; molecular chaperones; protein folding; signal transduction; ansamycin
8.  Development of a Canadian Standardized Protocol for Subtyping Methicillin-Resistant Staphylococcus aureus Using Pulsed-Field Gel Electrophoresis 
Journal of Clinical Microbiology  2001;39(10):3481-3485.
A panel of 24 methicillin-resistant Staphylococcus aureus strains was distributed to 15 laboratories in Canada to evaluate their in-house pulsed-field gel electrophoresis (PFGE) protocols and interpretation criteria. Attempts to compare fingerprint images using computer-aided analysis were not successful due to variability in individual laboratory PFGE protocols. In addition, individual site interpretation of the fingerprint patterns was inadequate, as 7 of 13 sites (54%) made at least one error in interpreting the fingerprints from the panel. A 2-day standardized PFGE protocol (culture to gel image) was developed and distributed to all of the sites. Each site was requested to use the standardized protocol on five strains from the original panel. Thirteen sites submitted gel images for comparisons. The protocol demonstrated excellent reproducibility and allowed interlaboratory comparisons with Molecular Analyst DST software (Bio-Rad) and 1.5% band tolerance.
PMCID: PMC88375  PMID: 11574559
9.  Wrong biochemistry results  
BMJ : British Medical Journal  2001;323(7315):705-706.
PMCID: PMC1121270  PMID: 11576963
10.  Predisposing factors for delirium in the surgical intensive care unit 
Critical Care  2001;5(5):265-270.
Delirium is a sign of deterioration in the homeostasis and physical status of the patient. The objective of our study was to investigate the predisposing factors for delirium in a surgical intensive care unit (ICU) setting.
Between January 1996 and 1997, we screened prospectively 818 patients who were consecutive applicants to the general surgery service of Dicle-University Hospital and had been kept in the ICU for delirium. All patients were hospitalized either for elective or emergency services and were treated either with medication and/or surgery. Suspected cases of delirium were identified during daily interviews. The patients who had changes in the status of consciousness (n = 150) were consulted with an experienced consultation-liaison psychiatrist. The diagnosis of delirium was based on Diagnostic and Statistical Manual of Mental Disorders (revised third edition) criteria and established through psychiatric interviews. Patients were divided into two groups: the 'delirious group' (DG) (n = 90) and the 'non-delirious group' (NDG) (n = 728). During delirium, all abnormal findings related to physical conditions, laboratory features, and additional diseases were evaluated as probable risk factors of delirium.
Of 818 patients, 386 (47.2%) were male and 432 (52.8%) were female. Delirium developed in 90 of 818 patients (11%). The cases of delirium in the DG were more frequent among male patients (63.3%) than female patients (36.7%) (χ2 = 10.5, P = 0.001). The mean age was 48.9 ± 18.1 and 38.5 ± 13.8 years in the DG and NDG, respectively (t = 6.4, P = 0.000). Frequency of delirium is higher in the patients admitted to the Emergency Department (χ2 = 43.6, P = 0.000). The rate of postoperative delirium was 10.9%, but there was no statistical difference related to operations between the DG and NDG (χ2 = 0.13, P = 0.71). The length of stay in the ICU was 10.7 ± 13.9 and 5.6 ± 2.9 days in the DG and NDG, respectively (t = 0.11, P = 0.000). The length of stay in hospital was 15.6 ± 16.5 and 8.1 ± 2.7 days in the DG and NDG, respectively (t = 11.08, P = 0.000). Logistic regression was used to explore the associations between probable risk factors and delirium. Delirium was not correlated with conditions such as hypertension, hypo/hyperpotassemia, hypernatremia, hypoalbuminemia, hypo/hyperglycemia, cardiac disease, emergency admission, age, length of stay in the ICU, length of stay in hospital, and gender. It was determined that conditions such as respiratory diseases (odds ratio [OR] = 30.6, 95% confidence interval [CI] = 9.5–98.4), infections (OR = 18.0, 95% CI = 3.5–90.8), fever (OR = 14.3, 95% CI = 4.1–49.3), anemia (OR = 5.4, 95% CI = 1.6–17.8), hypotension (OR = 19.8, 95% CI = 5.3–74.3), hypocalcemia (OR = 30.9, 95% CI = 5.8–163.2), hyponatremia (OR = 8.2, 95% CI = 2.5–26.4), azotemia (OR = 4.6, 95% CI = 1.4–15.6), elevated liver enzymes (OR = 6.3, 95% CI = 1.2–32.2), hyperamylasemia (OR = 43.4, 95% CI = 4.2–442.7), hyperbilirubinemia (OR = 8.7, 95% CI = 2.0–37.7) and metabolic acidosis (OR = 4.5, 95% CI = 1.1–17.7) were predicting factors for delirium.
We determined that conditions such as respiratory diseases, infections, fever, anemia, hypotension, hypocalcemia, hyponatremia, azotemia, elevated liver enzymes, hyperamylasemia, hyperbilirubinemia and metabolic acidosis were predicting factors for delirium.
PMCID: PMC83853  PMID: 11737901
delirium; intensive care unit; predisposing factors
Obtain the undergraduate medical students’ evaluation of an objective structured clinical examination (OSCE) formed by two stations in neurology.
The fifth-year medical students taking the neurology course at King Faisal University during the first rotation of academic year 1420-1421H (2000-2001G) made the evaluation. The time for each station was seven minutes. After finishing the examination, each student completed a six-item questionnaire on coverage, question clarity, time, patients, educational usefulness and organization of the examination with yes, no or don’t know responses.
A total of 48 students (30 males and 18 females) took the examination. The average time to complete the examination for a group of 16 students was 2 hours. The responses were positive for clarity of questions and organization of the examination 41(85%), and allotted time 36(75%). Thirty-two students (67%) found the structured examination a useful educational experience. About half the students expressed their concern about the coverage of taught material and the number of patients seen in the examination as representative of those seen during the course, and 11 students (23%) requested more time.
The students’ response to the use of the structured clinical examination as an objective tool for evaluation of clinical skills in neurology was favorable and comparable to reports from other parts of the world. Improvement is required in the number of patients, coverage and allotted time to optimize outcome by improving content validity and reducing stress on participating patients.
PMCID: PMC3439748  PMID: 23008655
Neurology; undergraduate; medical education; OSCE; Saudi Arabia
12.  Prevalence of Gulf war veterans who believe they have Gulf war syndrome: questionnaire study 
BMJ : British Medical Journal  2001;323(7311):473-476.
To determine how many veterans in a random sample of British veterans who served in the Gulf war believe they have “Gulf war syndrome,” to examine factors associated with the presence of this belief, and to compare the health status of those who believe they have Gulf war syndrome with those who do not.
Questionnaire study asking British Gulf war veterans whether they believe they have Gulf war syndrome and about symptoms, fatigue, psychological distress, post-traumatic stress, physical functioning, and their perception of health.
2961 respondents to questionnaires sent out to a random sample of 4250 Gulf war veterans (69.7%).
Main outcome measure
The proportion of veterans who believe they have Gulf war syndrome.
Overall, 17.3% (95% confidence interval 15.9 to 18.7) of the respondents believed they had Gulf war syndrome. The belief was associated with the veteran having poor health, not serving in the army when responding to the questionnaire, and having received a high number of vaccinations before deployment to the Gulf. The strongest association was knowing another person who also thought they had Gulf war syndrome.
Substantial numbers of British Gulf war veterans believe they have Gulf war syndrome, which is associated with psychological distress, a high number of symptoms, and some reduction in activity levels. A combination of biological, psychological, and sociological factors are associated with the belief, and these factors should be addressed in clinical practice.
What is already known on this topicThe term Gulf war syndrome has been used to describe illnesses and symptoms experienced by veterans of the 1991 Gulf warConcerns exist over the validity of Gulf war syndrome as a unique entityWhat this study adds17% of Gulf war veterans believe they have Gulf war syndromeHolding the belief is associated with worse health outcomesKnowing someone else who believes they have Gulf war syndrome and receiving more vaccinations were associated with holding the belief
PMCID: PMC48129  PMID: 11532836
14.  Epidemiological Screening of Lymphatic Filariasis Among Immigrants Using Dipstick Colloidal Dye Immunoassay 
We have recently reported that a dipstick colloidal dye immunoassay (DIA) that detect parasite antigens in human serum is sensitive and specific for the diagnosis of active infection of lymphatic filariasis. Rabbit polyclonal antibodies (RbBmCAg) labelled with a commercial dye, palanil navy blue was used to detect filarial antigenemia among Indonesian and Bangladeshi immigrant workers (N= 630) at oil palm estates at Hulu Trengganu District, Peninsular Malaysia. Microfilaremia with Brugia malayi were detected in 51 (8.10 %) individuals, of which 42 (6.67 %) were among the Indonesians and 9 (1.98 %) among the Bangladeshis. Microfilaremia with Wuchereria bancrofti were detected in 33 (5.24 %) individuals of which 15 (2.38 %) were among the Indonesians and 18 (2.86 %) among the Bangladeshis workers. The DIA detected 96 (15.24 %) antigenemic cases which comprise of all the microfilaremic cases and 15 (2.38 %) amicrofilaremic cases. The amicrofilaremic cases with filarial antigenemia consisted of 9 (1. 43 %) Indonesians and 6 (0.95%) Bangladeshis. We have used 6 ul of the RbBmCAg and diluted (1:10) patients’ sera per dipstick which make the DIA reagent conservative. The DIA is a rapid test and can be read in approximate 2 hours.. Additionally, coloured dots developed in the DIA can be qualitatively assessed visually for intensity. The DIA does not require sophisticated equipment or radioactivity, and therefore suitable for field application.
PMCID: PMC3413645  PMID: 22893756
Dipstick; Colloidal Dye; Immunoassay; Filariasis
15.  Gitelman's syndrome 
PMCID: PMC1281532  PMID: 11387426
18.  Use of Intron-Disrupted Polyadenylation Sites To Enhance Expression and Safety of Retroviral Vectors 
Journal of Virology  2001;75(1):199-204.
Normal mRNA polyadenylation signals are composed of an AAUAAA motif and G/U box spaced 20 to 30 bp apart. If this spacing is increased further, then polyadenylation is disrupted. Previously it has been demonstrated that insertion of an intron will similarly disrupt this signal even though such introns are removed during a nuclear splicing reaction (X. Liu and J. Mertz, Nucleic Acids Res. 21:5256–5263, 1993). This observation has led to the suggestion that polyadenylation site selection is undertaken prior to intron excision. We now present results that both support and extend these observations and in doing so create a novel class of retroviral expression vector with improved qualities. We found that when an intron-disrupted polyadenylation signal is inserted within a retroviral expression vector, such a signal, although reformed in the producer cell, remains benign until transduction, where it is then preferentially used. Thus, we demonstrate that upon transduction these vectors now produce a majority of shortened subgenomic species and as a consequence have a reduced tendency for subsequent mobilization from transduced cells. In addition, we demonstrate that the use of this internal signal leads to enhanced expression from such vectors and that this is achieved without any loss in titer. Therefore, split polyadenylation signals confer enhanced performance and improved safety upon retroviral expression vectors into which they are inserted. Such split signals may prove useful for the future optimization of retroviral vectors in gene therapy.
PMCID: PMC113913  PMID: 11119589

Results 1-19 (19)