A study of hospitalized COVID-19 patients with AKI in a setting of multiracial developing country.

BACKGROUND: The commonest indication for hospitalization in COVID-19 patients is hypoxemia or severe respiratory symptoms. However, COVID-19 disease may result in extrapulmonary complications including kidney-related pathology. The reported incidence of renal involvement related to COVID infection varies based on geographical location. OBJECTIVE: This study aimed to assess the incidence rate of AKI in hospitalized COVID-19 patients and identify risk factors and prognostic predictors. METHOD: In this retrospective study, we recruited hospitalized COVID-19 patients from January 2021 until June 2021 at the University Malaya Medical Center. The inclusion criteria were hospitalized for ≥ 48 h with confirmed COVID-19 infection and at least 18 years old. Patient demographic and clinical data were collected from electronic medical records. The staging of AKI was based on criteria as per KDIGO guidelines. RESULTS: One thousand five hundred twenty-nine COVID patients fulfilled the inclusion criteria with a male-to-female ratio of 759 (49.6%) to 770 (50.3%). The median age was 55 (IQR: 36-66). 500 patients (32.7%) had diabetes, 621 (40.6%) had hypertension, and 5.6% (n = 85) had pre-existing chronic kidney disease (CKD). The incidence rate of AKI was 21.1% (n = 323). The percentage of COVID patients in different AKI stages of 1,2 and 3 were 16.3%, 2.1%, and 2.7%, respectively. Fifteen hospitalized patients (0.98%) required renal replacement therapy. 58.8% (n = 190) of AKI group had complete recovery of kidney function. Demographic factors included age (p < 0.001), diabetes (p < 0.001), hypertension (p < 0.012), CKD (p < 0.001), and vaccination status (p = 0.042) were associated with an increased risk of developing AKI. We found that the AKI cohort had statistically significant lower platelet counts and higher ferritin levels than the non-AKI cohort. AKI is a risk predictor of prolonged hospitalization (p < 0.001) and higher mortality rates (P < 0.001). CONCLUSION: AKI is a common clinical complication among hospitalized COVID-19 patients. The etiology of AKI is multifactorial and may have an adverse impact on patient morbidity and mortality.

Cockayne Syndrome due to a maternally-inherited whole gene deletion of ERCC8 and a paternally-inherited ERCC8 exon 4 deletion.

Cockayne Syndrome (CS) is an autosomal recessive disorder that causes neurological regression, growth failure and dysmorphic features. We describe a Chinese female child with CS caused by deletions of exon 4 of ERCC8 on one chromosome and exons 1-12 on the other chromosome. By using chromosomal microarray, multiplex ligation-dependant probe analysis and long range PCR, we showed that she inherited a 277 kb deletion affecting the whole ERCC8 gene from the mother and a complex rearrangement resulting in deletion of exon 4 together with a 1,656 bp inversion of intron 4 from the father. A similar complex rearrangement has been reported in four unrelated Japanese CS patients. Analysis of the deletion involving exon 4 identified LINE and other repeat elements that may predispose the region to deletions, insertions and inversions. The patient also had insulin-dependent diabetes mellitus, a rare co-existing feature in patients with CS. More research will be needed to further understand the endocrine manifestations in CS patients.

Ovitrap surveillance of the dengue vectors, Aedes (Stegomyia) aegypti (L.) and Aedes (Stegomyia) albopictus Skuse in selected areas in Bentong, Pahang, Malaysia.

Ovitrap surveillance was conducted in methodically selected areas in Bentong, Pahang, Malaysia from June 2008 till December 2009 in order to identify insular sites with stable Aedes aegypti population. Eleven sites were surveyed in Bentong district, Pahang, and one of these locations (N3º33' E101º54') was found to have an ovitrap index of Ae. aegypti and Aedes albopictus ranging from 8%-47% and 37%-78% respectively, indicating that this site could be a high-risk area for dengue outbreak. Ae. aegypti larvae were found in both indoor and outdoor ovitraps (p>0.05) while significant difference between the populations of Ae. albopictus larvae from indoors and outdoors was observed (p<0.01). Data collected in this study could provide important entomological information for designing an effective integrated vector control programme to combat Aedes mosquitoes in this area.

Dengue vector surveillance in insular settlements of Pulau Ketam, Selangor, Malaysia.

A year-long ovitrap surveillance was conducted between November 2007 and October 2008 in two insular settlements (Kampung Pulau Ketam and Kampung Sungai Lima) within the Malaysian island of Pulau Ketam. Eighty standard ovitraps were placed indoors and outdoors of randomly selected houses/locations. Results demonstrated an endemic baseline Aedes population throughout the year without weekly large fluctuations. Kampung Pulau Ketam has high Aedes aegypti and Aedes albopictus population, but only Ae. aegypti was found in Kampung Sungai Lima. Aedes aegypti showed no preference for ovitraps placed indoor versus outdoor. However, as expected, significantly more outdoor ovitraps were positive for Ae. albopictus (p<0.05). Trends in Ae. albopictus and Ae. aegypti populations mirrored each other suggesting that common factors influenced these two populations.

Down-regulation of PPARgamma2-induced adipogenesis by PEGylated conjugated linoleic acid as the pro-drug: Attenuation of lipid accumulation and reduction of apoptosis.

This study is designed to evaluate whether the PEGylated conjugated linoleic acid (PCLA) as the pro-drug can have favorable stability, bioavailability, and anti-adipogenic activity in 3T3-L1 cells for anti-obesity when compared with conjugated linoleic acid (CLA) itself. The CLA was simply coupled to poly(ethylene glycol) (PEG) at the melting state without solvents or catalysts through ester linkages between the carboxylic group of CLA and the hydroxyl group of PEG. To confirm of PCLA as the pro-drug, CLA release from PCLA was investigated by using high-performance liquid chromatographic (HPLC), showing that CLA release from PCLA was almost 90% in a nearly continuous fashion over the next 75h. Apoptosis was promoted by both CLA- and PCLA-treatments with increasing concentrations. However, the level of cell apoptosis induced by PCLA was lower than that induced by CLA owing to the biocompatible and hydrophilic properties of PEG. Moreover, the PCLA decreased glycerol-3-phosphate dehydrogenase (GPDH) activity in 3T3-L1 cells by acting upon major adipocyte marker proteins such as PPARgamma2, C/EBPalpha, and aP2 modulators. Furthermore, either CLA or PCLA stimulated basal, but not isoproterenol-sensitive, lipolysis in our cell model, suggesting that both CLA and PCLA may stimulate lipolysis via hormone sensitive lipase (HSL)-independent mechanisms. These results suggest that the PCLA may prove to be a stable pro-drug to control the deposition of fat in the human body, and that the anti-adipogenic effect of the PCLA on 3T3-L1 cells will offer a challenging approach for anti-obesity.

Clinical Analysis of PTEN, p53 and Her-2/neu Expressions in Thyroid Cancers.

PURPOSE: The dual-specificity phosphatase PTEN/ MMAC1/TEP1 has recently been identified as the tumor suppressor gene most frequently mutated and/or deleted in human tumors. However, PTEN mutations have rarely been detected in sporadic thyroid cancers. Therefore, this study investigated the PTEN expression of thyroid cancer and the relationship between PTEN, clinical status and other biologic factors such as HER-2/neu and p53. MATERIALS AND METHODS: The study samples consisted of 62 thyroid cancer specimens and 24 benign thyroid tumor specimens from patients who were operated on the Department of Surgery, Uijongbu St. Mary's hospital during the 5 years from January 1995 until January 2000. All tumors were studied by immunohistochemical staining using monoclonal antibodies against PTEN, HER-2/neu and p53. The results were analyzed statistically. RESULTS: PTEN protein was found to be under-expressed more frequently in thyroid cancers (29%) than in benign thyroid tumors (4.2%). The reduction in PTEN expression in thyroid cancers was not significantly related with the recorded clinical factors such as size, age, lymph node metastasis and p53, except for HER-2 which was found to be significantly related (p=0.001). HER-2 over- expression was noted in thyroid cancer (83.8%) more frequently than in benign tumors (16.7%). CONCLUSION: This study has demonstrated that the under-expression of PTEN protein and the over-expression of HER-2 protein may play a role in the carcinogenesis and development of thyroid cancer.

A case of primary leiomyosarcoma of the lesser omentum.

Leiomyosarcoma is a rare tumor that originates in the smooth muscle, usually in the gastrointestinal tract, the retroperitoneum and the genitourinary tract. The omentum has been rarely reported as a primary site of occurrence with leiomyosarcoma. A 72 year-old woman, with palpable mass on the left upper quadrant of abdomen and weight loss, was admitted to St. Paul's Hospital. Abdominal CT scan showed a 12 x 8 x 8 cm-sized cystic mass in the left upper quadrant of the abdomen. Endoscopic ultrasonography showed a large cystic mass between the stomach and the liver, which was 1.6 cm length in wall thickness. Laparotomy and resection of the mass was performed. A 12 x 8 x 8 cm-sized mass, originated from the lesser omentum, was discovered near the lesser curvature of the stomach. Microscopic examination revealed spindle-shaped cells with 7-8 mitoses per high power field. She was diagnosed as primary leiomyosarcoma originated from the lesser omentum.

Complicated varicella zoster infection in 8 paediatric patients and review of literature.

BACKGROUND: This is a study of complicated varicella zoster infection in paediatric patients. AIM: To find out the number of patients with such complications, the types of complications and their outcome. METHOD: This involved a retrospective review of the case records of 8 patients who presented to our unit over a 12-month period (Jan-Dec 96). All patients were previously well without any underlying immunodeficiency. Varicella zoster (VZ) infection was confirmed by VZ immunofluorescence from vesicular fluid. RESULTS: CMS complications accounted for 6 of the 8 cases. Of these, 3 presented with encephalitis, 2 with cerebella ataxia and 1 with aseptic meningitis and cerebella ataxia. Of the non-CNS cases, 1 presented with glomerulonephritis with superimposed staphylococcus infection of skin ulcers; the other had disseminated VZ infection with haemorrhagic vesicles, hepatitis, ileus with mesenteric adenitis and disseminated intravascular coagulation. OUTCOME: The patient with disseminated VZ infection and multiple organ involvement died 5 days after a stormy course. One patient with encephalitis who had status epilepticus for 2 hours had behavioural problems and poor memory. The remaining 6 patients had no sequelae. CONCLUSION: VZ infection usually a minor illness, can result in serious life-threatening complications in previously healthy patients.

Sulphite oxidase deficiency--a report of two siblings.

Isolated sulphite oxidase deficiency is a rare metabolic disorder characterised by neurological abnormalities, lens subluxation and seizures. Inheritance is autosomal recessive. We report two siblings with onset of clinical symptoms at 6 months of age, progressing to severe mental retardation, spasticity and seizures which were difficult to control. One of the siblings had lens subluxation. Diagnosis is made upon the increased levels of urinary sulphite, and high plasma S-sulphocysteine and thiosulphate levels. No treatment is known to be of help. Prenatal diagnosis is possible from the analysis of uncultured chorionic villus material for sulphite oxidase.

A case of combined gastrojejunal and gastrocolic fistula secondary to gastric cancer.

A rare case of gastric cancer associated with gastrojejunal and gastrocolic fistula is presented. A 56-year-old man who had been diagnosed with advanced gastric cancer(Borrmann's type III) 5 months previously was admitted due to watery diarrhea and frequent vomiting for 2 weeks. Fluoroscopic examination was visualized two abnormal passage of contrast medium from the stomach, one to the colon, and the other to the jejunum. Gastrofiberscopy revealed that the tumor on the great curvature of the body appeared to penetrate into the colon, while the other one on the antrum directly invaded into the jejunum. The patient was treated conservatively with total parenteral nutrition and pain control.

Improvement on image transform coding by reducing interblock correlation.

We try to improve transform coding efficiency by alleviating the interblock correlation due to the small size of the block. The proposed method needs minor modification from conventional transform coding techniques such as JPEG, and reduces the information loss in the coding procedure for a given bit rate. Simulation results demonstrate that the method drastically diminishes the blocking effects and enhances the subjective visual quality compared with such existing algorithms as JPEG and LOT.

Multiple pterygium syndrome (Escobar syndrome)--a case report.

A 4-year-old boy with Escobar Syndrome, a rare syndrome of sporadic or autosomal recessive inheritance is described. The main features include small stature, multiple pterygia of the neck, axilla, antecubital area, a typical facies and limb abnormalities with normal intelligence.

Etiology of acute severe lower respiratory tract infection in hospital-based patients.

Acute respiratory infections are common childhood illnesses. Most are mild and self-limiting. Five percent are lower respiratory tract diseases and are potentially serious. A prospective study was conducted to ascertain the etiology of community-acquired severe lower respiratory tract infections (LRTI) in hospital based patients. Mycoplasma was the most frequently identified agent (33%). This was followed by viruses (28%) and bacteria (15%). Twenty-four percent of children had no identified causative agent.

Complications of severe lower respiratory tract infections in Singapore children.

Over one year period, 240 children with severe lower respiratory infection was admitted to a general paediatric department. The mortality was 1.6%. Apart from pleural effusions and skin exanthems, several major complications were noted. These were septicaemia (1), apnoea (2), encephalopathy (3), meningitis (1), Stevens Johnson Syndrome (1), bronchiectasis (1) and lung abscess (1).

Mycoplasma infection in children.

One hundred and eleven children with Mycoplasma pneumonia infection were studied. Their mean age was 6.2 +/- 3.1 years. The two commonest symptoms were cough (98%) and fever (95%). Only 23% of children had cough of greater than one week's duration. Ninety one per cent had positive chest signs. Radiological abnormalities were seen in 95% of chest x-ray. Complications included dermatological (10%), pleural effusion (5%), neurological disorder (3%), septicaemia (1%), bronchiectasis (1%). Two children with Down's Syndrome died. A rare case of Mycoplasma bronchitis with Reye's Syndrome was observed.

Severe bronchiolitis in children.

Acute viral bronchiolitis is one of the most common causes of paediatric respiratory disease, especially in the first year of life. Young infants and those with pre-existent cardiorespiratory problems are at an increased risk of acute respiratory failure necessitating mechanical ventilation. A prospective study was carried out from November 1988 to October 1989, to analyse the clinical features, aetiology and outcome of patients with severe bronchiolitis. 52 (29.9%) out of 174 cases of acute bronchiolitis admitted were found to be severe. A virus aetiology was identified in 75% of the cases, respiratory syncytial virus (RSV) being the commonest agent. 88.5% of the patients were less than 1 year of age, with a male preponderance of 1.4:1. There was a higher incidence in the Malay ethic group. Despite the viral aetiology, 88.2% were treated with a course of antibiotics. There was one death, and 2 patients had apnea requiring mechanical ventilation.

Cockayne's syndrome--difficulties with early diagnosis.

The features of Cockayne's syndrome do not appear until 4 to 5 years of age. Early diagnosis is important for proper genetic counselling and antenatal screening. Despite various "diagnostic tests" offered by many authors, early diagnosis of the syndrome is still problematic. Four cases which were initially diagnosed as cerebral palsy are presented to illustrate this difficulty. Two cases were diagnosed as spastic cerebral palsy and the other two as familial spastic paraplegia. The features of Cockayne's syndrome appeared later.

Margosa oil poisoning as a cause of toxic encephalopathy.

Margosa Oil is an extract of the seed of the Neem tree and is widely used as a traditional medicine by Indians in India, Sri Lanka, Burma, Thailand, Malaysia and Indonesia. Used mainly for external applications, it is often administered orally to neonates and infants regularly in small amounts. Margosa Oil causes toxic encephalopathy particularly in infants and young children. The usual features are vomiting, drowsiness, tachypnea and recurrent generalised seizures. Leucocytosis and metabolic acidosis are significant laboratory findings. Management is aimed primarily towards the control of convulsions although supportive management is equally important. Prognosis is usually good but fatalities and neurological deficits have been reported. We report here two infants with Margosa Oil poisoning presenting with encephalopathy.

Enteroviral meningitis in neonates.

We present 4 neonates with enteroviral meningitis. The cerebrospinal fluid findings were variable and posed a diagnostic problem. Immediate outcome was excellent and 3 of the 4 infants were normal at follow-up at 6 months of age. However long-term follow-up will be necessary to to determine any long-term sequelae.

Bacterial meningitis--a four year survey in a paediatrics unit.

The aim of this prospective survey was to study the clinical profile, the incidence among the various age groups, the bacteriology, sequelae and mortality in patients, with bacterial meningitis. Patients included in the study were 36 cases of bacterial meningitis admitted to the Paediatric Unit, Tan Tock Seng Hospital, Singapore, between the period January 1984 to December 1987. Of the total number of patients, 36% were in the neonatal age group. Positive bacterial cultures were obtained in 45% of cases in both the cerebrospinal fluid and blood. The incidence of neurological sequelae was about 10%. 14% of the patients died and the majority of deaths were patients in the neonatal age group. Among the patients studied, was one who had recurrent episodes of bacterial meningitis.