Linezolid-induced lactic acidosis.

Linezolid is a commonly prescribed antibiotic in clinical practice. Although thrombocytopenia and peripheral neuropathy are frequently encountered following prolonged administration of linezolid, lactic acidosis is a rare adverse drug reaction. We present the case of a patient on linezolid for disseminated multidrug-resistant tuberculosis who presented with vomiting, dyspnoea, hypotension and high anion gap metabolic acidosis. The initial presentation mimicked sepsis syndrome. Ketoacidosis and renal dysfunction were ruled out. There was no history of ingestion of toxins/toxic alcohols. Sepsis was unlikely because extensive radiological and microbiological testing could not identify an infection. Given the possibility of linezolid-induced lactic acidosis (LILA), linezolid was discontinued on admission. The patient's lactic acidosis resolved, and his overall condition improved. A retrospective diagnosis of LILA was thus established. LILA should be considered when patients on linezolid present with lactic acidosis and other causes for the lactic acidosis have been ruled out.

Rare and unexpected cause for retropharyngeal abscess in an immunocompetent man: metastatic community-acquired methicillin-resistant Staphylococcus aureus infection.

Staphylococcus aureus causes clinical diseases ranging from mild skin infections to devastating conditions such as septic shock, endocarditis and osteomyelitis. S. aureus is a common cause of community-acquired bacteraemia. Prolonged bacteraemia may cause metastatic infection, manifesting as endocarditis, osteomyelitis and abscesses. A man in his 20s presented with a short-duration of fever and odynophagia. CT of the neck suggested a retropharyngeal abscess. Retropharyngeal abscesses are typically polymicrobial and caused by resident oral cavity flora. In the hospital, he developed shortness of breath and hypoxia. CT of the chest showed peripheral, subpleural nodular opacities raising suspicion for septic pulmonary emboli. Blood cultures demonstrated the growth of methicillin-resistant S. aureus The patient completely recovered with antibiotic therapy alone. This is a unique and rare presentation case of metastatic S. aureus bacteraemia, manifesting as a retropharyngeal abscess without any evidence of infective endocarditis on transoesophageal echocardiography.

Diagnostic Values of Laboratory Biomarkers in Predicting a Severe Course of COVID-19 on Hospital Admission.

Objective: We intend to identify differences in the clinicodemographic and laboratory findings of COVID-19 patients to predict disease severity and outcome on admission. Methods: This single-centred retrospective study retrieved laboratory and clinical data from 350 COVID-19 patients on admission, represented as frequency tables. A multivariate regression model was used to assess the statistically significant association between the explanatory variables and COVID-19 infection outcomes, where adjusted odds ratio (AOR), p value, and 95% CI were used for testing significance. Results: Among the 350 COVID-19 patients studied, there was a significant increase in the WBC count, neutrophils, aggregate index of systemic inflammation (AISI), neutrophil-to-lymphocyte ratio (dNLR), neutrophil-to-lymphocyte and platelet ratio (NLPR), monocyte-to-lymphocyte ratio (MLR), systemic immune-inflammation index (SII), systemic inflammation response index (SIRI), D-dimer, interleukin-6 (IL-6), ferritin, lactate dehydrogenase (LDH), prothrombin time (PT), glucose, urea, urea nitrogen, creatinine, alanine phosphatase (ALP), and aspartate aminotransferase (AST) and a significant decrease in lymphocytes, eosinophils, total protein, albumin, prealbumin serum, and albumin/globulin (A/G) ratio in the severe group when compared with the mild and moderate groups. However, after adjusting their age, gender, and comorbidities, WBC count (adjusted odds ratio (AOR) = 6.888, 95% CI = 1.590-29.839, p = 0.010), neutrophils (AOR = 5.912, 95% CI = 2.131-16.402, p = 0.001), and urea (AOR = 4.843, 95% CI = 1.988-11.755, p = 0.001) were strongly associated with disease severity. Interpretation and Conclusion. On admission, WBC count, neutrophils, and urea, with their cut of values, can identify at-risk COVID-19 patients who could develop severe COVID-19.

A challenging case of pyrexia of unknown origin: adrenal histoplasmosis mimicking tuberculosis in a patient with chronic hepatitis C.

We present an unusual case of fever of unknown origin with bilateral adrenal masses in a patient with compensated chronic liver disease (compensated) due to hepatitis C who had been treated elsewhere with four months of anti-tuberculous therapy for suspected disseminated tuberculosis (TB). At our institution, he underwent a CT-guided biopsy of the adrenal lesion which to our surprise did not reveal any evidence of TB but a close mimic.

An unusual case of tropical pyomyositis: cryptococcal pyomyositis.

The more common manifestations of cryptococcal infections are restricted to the central nervous system and lungs. A young man, suffering from idiopathic dilated cardiomyopathy with a left ventricular ejection fraction of 20%, presented with subacute, painful tender swelling in both legs initially attributed to congestive cardiac failure. No response to diuretics was achieved. Metabolically active lesions in the muscles of both lower limbs suggestive of muscle abscesses were found. A diagnosis of tropical pyomyositis was therefore made, but aspiration surprisingly revealed gram-positive yeast cells, staining of which on India ink and culture confirmed Cryptococcus. A good response to a combination of liposomal amphotericin B and flucytosine was obtained, but nevertheless the patient died from heart failure after induction of antifungal therapy.

An unusual cause for rib osteomyelitis in the tropics: Cryptococcal osteomyelitis.

The more common manifestations of cryptococcal infections are restricted to the central nervous system and lungs. We report an unusual case of fungal osteomyelitis due to Cryptococcus. The patient was a young man who had been adequately treated for pulmonary tuberculosis three years prior. Three months before, he sustained a minor road-traffic accident with only minor abrasions. He presented with subacute chest pain of 15 days' duration and was found to have radiological evidence of a lytic lesion of the fifth rib. Given prior tuberculosis, he was thought to have a relapse of disease with tuberculous osteomyelitis. Surprisingly, a biopsy revealed evidence of fungal osteomyelitis with Cryptococcus. An evaluation for primary immunodeficiency revealed low CD4 cell counts with undetectable serum IgA and IgM levels. Genetic sequencing proved a genetic mutation consistent with primary T-cell immunodeficiency. The patient responded well to treatment and is asymptomatic on follow-up.

Fever, thrombocytopenia, and AKI-A profile of malaria, dengue, and leptospirosis with renal failure in a South Indian tertiary-care hospital.

INTRODUCTION: In the tropics, the triad of fever, thrombocytopenia, and AKI portends a grim prognosis with high mortality and a severe strain on already-stretched resources. Malaria, dengue, and leptospirosis account for most cases. We undertook a review of cases to determine factors accounting for adverse prognosis. METHODS: All patients presenting to the emergency room (ER) with a history of fever, thrombocytopenia, and renal failure were included in the study. Patients were followed until discharge or death, and end points looked at were 1-week and 30-day mortality, and renal function upon discharge. Parameters like liver function test (LFT), renal function, and platelet count upon discharge were also documented. RESULTS: A total of 43 patients was included in the study. Mean age was 42.5 years with 86% males. Mean APACHE and SOFA scores on admission were 23.89 and 15.42, respectively. Mean admission platelet counts were 41,000. Mean serum creatinine was 4.1, and bilirubin was 9.94. A platelet count of < 34,000, serum creatinine of > 4, albumin of > 2.3, SOFA score of > 20, and APACHE score of > 32.2 were significantly predictive of 1 week mortality. Need for mechanical ventilation, oliguria on admission, and need for dialysis all were highly predictive of 30-day mortality. In addition, a serum bicarbonate of < 12, INR of > 1.5, hemoglobin of < 9.5 were highly predictive of higher 30 day mortality. Overall, 1-week mortality was 16.3%, of which 48% was accounted for by patients with leptospirosis. CONCLUSIONS: Factors like low platelet count, oliguria, need for dialysis, high APACHE and SOFA scores on admission, need for mechanical ventilation, and low serum albumin portend a grave prognosis. There is need for randomized control trials (RCT) to further determine adverse prognostic factors in this subsect of patients.

An unusual case of refractory wheeze.

A 37-year-old man presented with a history of episodic wheeze and breathlessness of 3 years' duration refractory to treatment. Physical examination revealed diffuse expiratory polyphonic rhonchi while the remainder of the examination including the cardiac examination was reported as normal. Pulmonary function testing revealed mild obstruction with bronchodilator reversibility. The patient was discharged on a 6-month course of antitubercular treatment (ATT) as bronchial brush cytology (obtained via bronchoscopy) was positive for acid-fast bacilli. The patient presented after completing 6 months of ATT with persistent symptoms, a loud S1 and a mid-diastolic murmur at the apex. High-resolution CT of the chest showed bilateral dependent ground glass opacities. An echocardiogram revealed a left atrial myxoma, and normal RV size and pressures. The patient underwent successful surgical removal of the same, and made a complete recovery. Refractory wheeze is a very unusual presentation of a left atrial myxoma.

Development and validation of HPLC analytical method for nepafenac in ophthalmic dosage form (suspension).

The aim of the present study was to develop and validate an analytical method for the estimation of nepafenac as a raw material as well as in dosage form (suspension) by using reverse phase high performance liquid chromatographic (RP-HPLC). The target was to obtain an easy, rapid, reproducible as well as a rugged method. The HPLC system that was used in the proposed study was LC-20AD liquid chromatograph equipped with SPD-20A UV-VIS detector. The separation was performed on C18 column which was attached with loop 20 ß l. Elution was done at ambient temperature with a mobile phase consisting of acetonitrile: Water (40: 60v/v) at a flow rate of 1ml/min and at a wavelength of 254 nm. The proposed method was validated as per the ICH guidelines. The retention time for nepafenac was 7.49 minutes (% CV=0.0076). The percentage coefficient variation (CV) of six consecutive peak areas of injections was 0.34% with tailing factor 1.76. The peak area responses were linear within the concentration range of 0.078-20.0 ßg/ml (R(2)=0.9993). The sensitivity of the method could be evaluated by limits of detection (LOD) (0.0195 ß g/ml) and limits of quantitation (LOQ) (0.039 ß g/ml). Nepafenac drug is s in its diluent that could see by intra-day (% CV =0.45-1.96) and inter-day variation (%CV=0.173-1.898%). The accuracy and recovery results of 80%, 100% and 120% were 97.40% to 102.10% with % CV of 0.3201% to 1.3496%. The robustness and ruggedness of the method are significantly broader and is reproducible. It could be used as a more convenient, efficient, easy and time saving method for the analysis of drug in raw material as well as in dosage form (ophthalmic suspension).

Widespread capillary malformation associated with global developmental delay and megalencephaly.

Although port wine stains are seen in 0.3% births, widespread cutaneous capillary malformations are unusual and an association with static gliosis has not been previously reported. This is a report of a 3-year-old boy with a fixed widespread capillary naevus (port wine stain), megalencephaly and global developmental, and features of gliosis on brain magnetic resonance imaging (MRI).