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Malaria elimination relies on detection of Plasmodium falciparum Histidine-Rich Proteins 2/3 (HRP2/3) through rapid diagnostic tests (RDTs) and treatment with artemisinin-combination therapies (ACTs). Data from the Horn of Africa suggest increasing hrp2/3 gene deletions and ACT partial resistance kelch13 (k13) mutations. To assess this, 233 samples collected during a national survey from 7 regions of Ethiopia were studied for hrp2/3 deletions by droplet digital dPCR and k13 mutations by DNA sequencing. Approximately 22% of the study population harbored complete hrp2/3 deletions by ddPCR. Thirty-two of 42 of k13 SNPs identified were R622I associated with ACT partial resistance. Both hrp2/3 deletions and k13 mutations associated with ACT partial resistance appear to be co-occurring especially in Northwest Ethiopia. Ongoing national surveillance relying on accurate laboratory methods are required to fully elaborate the genetic diversity of P. falciparum to inform public health policy makers.
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Until now, no specific and effective treatment exists for coronavirus disease 2019 (COVID-19). Since honey and Nigella sativa (HNS) have established antiviral, antibacterial, antiinflammatory, antioxidant, and immunomodulatory properties, we tested their efficacy for this disease in a multicenter, placebo-controlled, and randomized clinical trial at four medical care facilities in Pakistan. RT-PCR confirmed COVID-19 adults showing moderate or severe disease were enrolled in the trial. Patients were randomly assigned in a 1:1 ratio to receive either honey (1 g kg-1 day-1 ) and Nigella sativa seeds (80 mg kg-1 day-1 ) or a placebo for up to 13 days along with standard care. The outcomes included symptoms' alleviation, viral clearance, and 30-day mortality in the intention-to-treat population. Three hundred and thirteen patients, 210 with moderate and 103 with severe disease, underwent randomization from April 30 to July 29, 2020. Among the moderate cases, 107 were assigned to HNS, whereas 103 were assigned to the placebo group. Among the severe cases, 50 were given HNS, and 53 were given the placebo. HNS resulted in ~50% reduction in time taken to alleviate symptoms as compared to placebo (moderate cases: 4 vs. 7 days, Hazard Ratio [HR]: 6.11; 95% Confidence Interval [CI]: 4.23-8.84, p < 0.0001 and for severe cases: 6 vs. 13 days, HR: 4.04; 95% CI: 2.46-6.64; p < 0.0001). HNS also cleared the virus earlier than placebo in both moderate cases (6 vs. 10 days, HR: 5.53; 95% CI: 3.76-8.14, p < 0.0001) and severe cases (8.5 vs. 12 days, HR: 4.32; 95% CI: 2.62-7.13, p < 0.0001). HNS further led to a better clinical score on day 6 with normal activity resumption in 63.6% vs. 10.9% among moderate cases (OR: 0.07; 95% CI: 0.03-0.13, p < 0.0001) and hospital discharge in 50% versus 2.8% in severe cases (OR: 0.03; 95% CI: 0.01-0.09, p < 0.0001). In severe cases, the mortality rate was less than 1/4th in the HNS group than in placebo (4% vs. 18.87%, OR: 0.18; 95% CI: 0.02-0.92, p = 0.029). No HNS-related adverse effects were observed. HNS, compared with placebo, significantly improved symptoms, expedited viral load clearance, and reduced mortality in COVID-19 patients. This trial was registered on April 15, 2020 with ClinicalTrials.gov Identifier: NCT04347382.
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COVID-19 , Mel , Nigella sativa , Adulto , Humanos , SARS-CoV-2 , Paquistão/epidemiologia , Resultado do TratamentoRESUMO
Rapid and accurate diagnosis of bacterial carbapenemases remains a major challenge for clinical laboratories. A novel assay was developed here using fluorescence identification of ß-lactamase activity (FIBA) to permit rapid detection and classification of bacterial carbapenemases. By mixing a fluorogenic ß-lactamase substrate, ß-LEAF (ß-lactamase enzyme-activated fluorophore), with bacterial isolates plus the respective inhibitor (imipenem for noncarbapenemase ß-lactamases, clavulanic acid for type A carbapenemases, and EDTA for type B carbapenemases), objective results with 95% to 100% sensitivity and specificity were generated in 10 min. FIBA is ≈$1/test and consists of only a single mixing step. Given the combination of rapidity, accuracy, low cost, and simplicity, this novel carbapenemase detection and classification assay is well positioned to be applied in clinical microbiology laboratories to provide guidance for the choice of proper treatment and control of globally prevalent carbapenemase-positive infections.
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Enterobacteriaceae , beta-Lactamases , Antibacterianos/farmacologia , Proteínas de Bactérias/genética , Humanos , Testes de Sensibilidade Microbiana , beta-Lactamases/genéticaRESUMO
We developed a carbapenemase test based on the ability of imipenem to inhibit noncarbapenemase ß-lactamases. The test uses bacterial isolates with a fluorescent ß-lactamase substrate, producing objective results with 100% sensitivity and specificity in 10 minutes. The assay is inexpensive and consists of only 1 mixing step.
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Proteínas de Bactérias , beta-Lactamases , Antibacterianos/farmacologia , Proteínas de Bactérias/genética , Imipenem/farmacologia , Testes de Sensibilidade Microbiana , Sensibilidade e Especificidade , beta-Lactamases/genéticaRESUMO
Control of equine nematodes has relied on benzimidazoles (BZs), tetrahydropyrimidines and macrocyclic lactones. The intensive use of anthelmintics has led to the development of anthelmintic resistance (AR) in equine cyathostomins and Parascaris equorum. Field studies indicate that BZ and pyrantel resistance is widespread in cyathostomins and there are also increasing reports of resistance to macrocyclic lactones in cyathostomins and P. equorum. The unavailability of reliable laboratory-based techniques for detecting resistance further augments the problem of nematode control in horses. The only reliable test used in horses is the fecal egg count reduction test; therefore, more focus should be given to develop and validate improved methodologies for diagnosing AR at an early stage, as well as determining the mechanisms involved in resistance development. Therefore, equine industry and researchers should devise and implement new strategies for equine worm control, such as the use of bioactive pastures or novel feed additives, and control should increasingly incorporate alternative and evidence-based parasite control strategies to limit the development of AR. This review describes the history and prevalence of AR in equine nematodes, along with recent advances in developing resistance diagnostic tests and worm control strategies in horses, as well as giving some perspective on recent research into novel control strategies.
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Anti-Helmínticos/farmacologia , Resistência a Medicamentos , Gastroenteropatias/veterinária , Doenças dos Cavalos , Nematoides/efeitos dos fármacos , Infecções por Nematoides/veterinária , Animais , Gastroenteropatias/diagnóstico , Gastroenteropatias/tratamento farmacológico , Doenças dos Cavalos/diagnóstico , Doenças dos Cavalos/tratamento farmacológico , Cavalos , Infecções por Nematoides/diagnóstico , Infecções por Nematoides/tratamento farmacológicoRESUMO
The present study is about to prepare stable cream of water-in-oil emulsion containing extracts of Crocus sativus against its base (without extracts) taken as control, to determine its stability on different storage conditions and effects on skin moisture contents and transepidermal water loss. The formulation contains 3% Crocus sativus (Saffron) concentrated extracts, and the base containing no extract, were formulated. Different stability tests were done on samples, which placed at 8°C, 25°C, 40°C and 40°C with 75% relative humidity, for 4 week period. These formulations (Creams) were applied on the cheeks of human volunteers for 8week period. To evaluate any effect produced by these formulations different skin parameters were monitored every week. The significant results of this study explored the fact that water-in-oil emulsion topical cream of saffron formulated from Crocus sativus extract has absolute physical stability at different storage conditions. The increase in skin moisture contents and changes in transepidermal water loss were significant (p<0.05) with respect to base and formulation respectively. Topical cream of Crocus sativus showed significant moisturizing effects on human skin.
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Crocus , Emolientes/farmacologia , Extratos Vegetais/farmacologia , Água Corporal/metabolismo , Emulsões , Humanos , Concentração de Íons de Hidrogênio , Pomadas , Pele/efeitos dos fármacos , Pele/metabolismoRESUMO
Takotsubo syndrome (TTS) is a transient ventricular dysfunction with apical ballooning triggered by emotional and/or physical stress. A few risk factors have been observed in patients with recurrent TTS, for example, excessive sympathetic stimuli, medications, stress, and tumors. Clinical features can vary from chest pain to overt hemodynamic instability. Diagnosis requires both electrocardiographic features and invasive imaging such as angiography to rule out other causes of cardiomyopathy prior to diagnosis. In addition, renal infarcts presenting as a complication of TTS are relatively uncommon. In this case report, we discuss the case of a 61-year-old African American woman with a prior history of TTS being managed for abdominal pain who developed a recurrence of the TTS during the hospital course. Prompt diagnosis and management of the condition is crucial to improve outcomes especially in patients with thromboembolic phenomenon or hemodynamic instability. Further large-scale studies are warranted to determine outcomes of patients with recurrent Takotsubo cardiomyopathy with thromboembolic phenomenon.
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Eletrocardiografia , Recidiva , Cardiomiopatia de Takotsubo , Tromboembolia , Humanos , Cardiomiopatia de Takotsubo/complicações , Cardiomiopatia de Takotsubo/diagnóstico , Feminino , Pessoa de Meia-Idade , Tromboembolia/complicaçõesRESUMO
The aim of the study is to compare the outcomes among ST-segment elevation myocardial infarction (STEMI) cases with early treatment vs delayed treatment. It was a prospective comparative study on 186 patients with consecutive (nonprobability) sampling. Two groups of cases were made as per their time to get admitted to the hospital (ie, within 2 hours of symptom onsetâ¯=â¯Group A; after 2 hours of symptom onsetâ¯=â¯Group B). Patients were asked for factors causing a delay in treatment after the onset of symptoms and were monitored for STEMI outcomes. The mean age of all patients was 46.62 ± 9.76 years and there were 140 (75.27%) male and 46 (24.73%) female, and male to female ratio 3:1.Factors significant for delayed treatment vs nondelayed treatment were poor social economic status (65.6% vs 20.4%), history of chronic stable angina (33.3% vs 11.8%), delayed response in the emergency room (20.4% vs 8.6%), delayed ECG acquisition (26.9% vs 8.6%), delayed ECG interpretation (25.8% vs 4.3%), pain at night 12:00-6:00 AM (21.5% vs 9.7%) and belief that the chest pain is noncardiac (26.9% vs 3.2%). Acute heart failure was significantly greater in group B (9.7%) in comparison with group A (2.2%), re-infarction was 18.3% in group B in comparison with 7.5% group A. Similarly sustained ventricular tachycardia and ventricular fibrillation and in-hospital mortality were higher in group B (12.9%, 14%, and 12.9% respectively). Due to delayed treatment patients had higher hospital stays, and complications, like acute heart failure, re-infarction, ventricular fibrillation, and in-hospital mortality.
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Insuficiência Cardíaca , Infarto do Miocárdio , Infarto do Miocárdio com Supradesnível do Segmento ST , Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Infarto do Miocárdio com Supradesnível do Segmento ST/diagnóstico , Infarto do Miocárdio com Supradesnível do Segmento ST/terapia , Infarto do Miocárdio/diagnóstico , Centros de Atenção Terciária , Fibrilação Ventricular , Países em Desenvolvimento , Estudos ProspectivosRESUMO
The prevalence of COVID-19 infection-related myocarditis, its in-hospital cardiovascular outcomes, and its impact on hospital cost and stay at national level are not well studied in the literature. The Nationwide Inpatient Sample Database from 2020 was queried to identify patients with COVID-19 and myocarditis versus those without myocarditis. Cardiovascular outcomes and resource utilization were studied among cohorts with COVID-19, with and without myocarditis, using descriptive statistics, multivariate regression matching, and propensity score matching using STATA version 17. Of 1,678,995 patients, 3,565 (0.21%) had COVID-19 with myocarditis, and 1,675,355 (99.78%) had COVID-19 without myocarditis. On multivariate regression analysis, we found higher odds of in-hospital mortality (adjusted odds ratio [aOR] 1.59, 95% confidence interval [CI] 1.27 to 1.9) in patients with myocarditis than in those without myocarditis, in addition to higher odds of major adverse cardiovascular and cerebrovascular events (aOR 3.54, 95% CI 2.8 to 4.4), acute kidney injury (aOR 1.29, 95% CI 1.27 to 1.9), heart failure (aOR 2.77, 95% CI 2.3 to 3.4), cardiogenic shock (aOR 10.2, 95% CI 7.9 to 13), myocardial infarction (aOR 5.74, 95% CI 4.5 to 7.3), and use of mechanical circulatory support (aOR 2.81, 95% CI 1.6 to 4.9). The propensity-matched cohort also favored similar outcomes. In conclusion, patients with COVID-19 and myocarditis had worse clinical outcomes, having a higher rate of in-hospital mortality, major adverse cardiovascular and cerebrovascular events with longer length of hospital stay, and higher hospitalization costs. Large prospective trials are necessary to validate these findings with diagnostic measures, including biopsy and cardiac magnetic resonance imaging for the extent of myocardial involvement.
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COVID-19 , Miocardite , Humanos , Pacientes Internados , Estudos Prospectivos , Hospitais , Mortalidade Hospitalar , Estudos RetrospectivosRESUMO
Background: Radiation exposure is an occupational hazard for interventional cardiologists and cardiac catheterisation laboratory staff that can manifest with serious long-term health consequences. Personal protective equipment, including lead jackets and glasses, is common, but the use of radiation protective lead caps is inconsistent. Methods: A systematic review qualitative assessment of five observational studies using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines protocol was performed. Results: It was concluded that lead caps significantly reduce radiation exposure to the head, even when a ceiling-mounted lead shield was present. Conclusion: Although newer protective systems are being studied and introduced, tools, such as lead caps, need to be strongly considered and employed in the catheterisation laboratory as mainstay personal protective equipment.
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A balanced diet with many dietary components maintains immune homeostasis directly by interacting with innate and adaptive immune components or indirectly through gut microbiota and their metabolites. Dietary components may inhibit pro-inflammatory mediators and promote anti-inflammatory functions or vice versa. Western diets with imbalanced dietary components skew the immune balance toward pro-inflammation and induce intestinal inflammation, consequently leading to many intestinal and systemic inflammatory diseases like ulcerative colitis, Crohn's disease, irritable bowel syndrome, cardiovascular problems, obesity, and diabetes. The dietary component-induced inflammation is usually chronic in nature and frequently caused or accompanied by alterations in gut microbiota. Therefore, microbiome-targeted therapies such as probiotics, prebiotics and synbiotics hold great potentials to amend immune dysregulation and gut dysbiosis, preventing and treating intestinal and systemic inflammatory diseases. Probiotics, prebiotics and synbioitcs are progressively being added to foods and beverages, with claims of health benefits. However, the underlining mechanisms of these interventions for preventing and treating dietary component-induced inflammation are still not very clear. In addition, possibly ineffective or negative consequences of some probiotics, prebiotics and synbiotics call for stringent testing and regulation. Here, we will first briefly review inflammation, in terms of its types and the relationship between different dietary components and immune responses. Then, we focus on current knowledge about the direct and indirect effects of probiotics, prebiotics and synbiotics on intestinal and systemic inflammation. Understanding how probiotics, prebiotics and synbiotics modulate the immune system and gut microbiota will improve our strategies for preventing and treating dietary component-induced intestinal inflammation and inflammatory diseases.
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Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) is increasingly recognized as an inherited and autosomal dominant arteriopathy of the cerebral vasculature, which is commonly misdiagnosed due to its different modes of presentation. It is characterized by variable manifestations of ischemic episodes, migraine with aura, cognitive deficits, and psychiatric disturbances. CADASIL is caused by a genetic mutation in the NOTCH3 gene, which is present on chromosome 19. The diagnosis of CADASIL can be made by personal and family history, skin biopsy, and magnetic resonance imaging (MRI) of the head showing high-intensity signal lesions, microbleeds, and white matter changes. There are currently no disease-modifying therapies available for CADASIL, and management focuses on reducing risk factors such as diabetes and hypertension and control of symptoms. We present a rare cause of transient ischemic attack (TIA) in a young female who was later diagnosed with CADASIL and aim to highlight rare and inherited causes of TIA and strokes in younger patients.
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Metformin is widely prescribed as the first-line medication for type II diabetes mellitus. While the gastrointestinal side effects of metformin such as nausea, vomiting, diarrhea, and heartburn are quite common, one dangerous side effect of metformin, lactic acidosis, is extensively discussed yet rarely reported. Here, we discuss a 53-year-old female with type II diabetes mellitus who presented to an emergency department (ED) with chief complaints of dizziness and lightheadedness. The patient had chronic kidney disease (CKD) with a baseline estimated glomerular filtration rate (eGFR) of 45 mL/minute/1.73 m2. Initial laboratory results showed acute kidney injury (AKI) with hyperkalemia and lactic acidosis of 20 mmol/L. The patient was admitted to the ICU requiring emergent dialysis. Later, she was diagnosed with metformin-associated lactic acidosis (MALA). Her AKI and lactic acidosis subsequently improved. Metformin-associated lactic acidosis (MALA) is a rare but serious side effect of metformin. It is primarily reported in patients with chronic renal failure; therefore, it should be used with caution in these patients. Renal replacement therapy (RRT) is the critical management option for patients with MALA. Because of this, physicians prescribing metformin should carefully monitor all patients and assess the risk of developing severe side effects.
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Medullary thyroid cancer (MTC) is a neuroendocrine tumor of the parafollicular cells of the thyroid gland. The prognosis is very poor in patients with advanced MTC. Vandetanib was approved for advanced MTC after randomized control trials showed that it had therapeutic efficacy and considerably prolonged progression-free survival. Vandetanib therapy is associated with serious cardiovascular side effects including hypertensive crisis and arrhythmias due to prolonged QTc. We present a case of an 83-year-old female with advanced metastatic MTC who is under treatment with vandetanib 300 mg/day and developed medication-related hyponatremia, QTc prolongation, ventricular fibrillation (VF), and torsades de pointes (TdP). Her vandetanib therapy was held. Subsequently, she did not show recurrences of TdP. This is the second such case report in the literature.
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Eradication of malaria, a mosquito-borne parasitic disease that hijacks human red blood cells, is a global priority. Microscopy remains the gold standard hallmark for diagnosis and estimation of parasitemia for malaria, to date. However, this approach is time-consuming and requires much expertise especially in malaria-endemic countries or in areas with low-density malaria infection. Thus, there is a need for accurate malaria diagnosis/parasitemia estimation with standardized, fast, and more reliable methods. To this end, we performed a proof-of-concept study using the automated imaging (NanoZoomer) platform to detect the malarial parasite in infected blood. The approach can be used as a steppingstone for malaria diagnosis and parasitemia estimation. Additionally, we created an algorithm (ParasiteMacro) compatible with free online imaging software (ImageJ) that can be used with low magnification objectives (e.g., 5×, 10×, and 20×) both in the NanoZoomer and routine microscope. The novel approach to estimate malarial parasitemia based on modern technologies compared to manual light microscopy demonstrated 100% sensitivity, 87% specificity, a 100% negative predictive value (NPV) and a 93% positive predictive value (PPV). The manual and automated malaria counts showed a good Pearson correlation for low- (R2 = 0.9377, r = 0.9683 and p < 0.0001) as well as high- parasitemia (R2 = 0.8170, r = 0.9044 and p < 0.0001) with low estimation errors. Our robust strategy that identifies and quantifies malaria can play a pivotal role in disease control strategies.
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Staphylococcus aureus is one of the most important bacterial pathogens causing bovine mastitis, which leads to huge economic losses worldwide. Here, we report draft genome sequences and antimicrobial resistance gene profiles of five Staphylococcus aureus strains that were isolated from bovine milk in Pakistan.
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Ivermectin (IVM) is a versatile drug used against many microorganisms. Staphylococcus aureus is one of the most devastating microorganisms. IVM sensitive and resistant S. aureus strains were recently reported. However, the underlying molecular mechanisms of resistance are unknown. Clinical isolates of S. aureus were used for determination of the sensitivities against IVM by growth curve analysis and time-kill kinetics. Then, proteomic, and biochemical approaches were applied to investigate the possible mechanisms of resistance. Proteomic results showed a total of 1849 proteins in the dataset for both strains, 425 unique proteins in strain O9 (IVM sensitive), and 354 unique proteins in strain O20 (IVM resistant). Eight proteins with transport functions were differentially expressed in the IVM resistant strain. Among them, three efflux pumps (mepA, emrB, and swrC) were confirmed by qPCR. The IVM resistant S. aureus may overexpress these proteins as a key resistance determinant. Further experiments are required to confirm the exact mechanistic relationship. Nevertheless, the possibility of blocking these transporters to reverse or delay the onset of resistance and reduce selection pressure is potentially appealing.
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Atypical hemolytic uremic syndrome (HUS) is a rare but severe form of thrombotic microangiopathies (TMAs) that affects both children and adults. The clinical presentation is usually nonspecific, including a broad spectrum of symptoms ranging from abdominal pain, confusion, diarrhea, fatigue, irritability, hypertension, and lethargy. We present a case of a 36-year-old woman with medical comorbidities of asthma and pulmonary embolism who presented to our hospital in the 36th week of her pregnancy for preterm premature rupture of the membranes. The postoperative course was complicated with a sudden onset drop in hemoglobin and acute onset thrombocytopenia. Complements levels were normal while ADAMTS 13 (von Willebrand factor-cleaving protease) activity was 81% which ruled out ADAMTS 13 deficiency. No significant clinical improvement was seen after five cycles of plasmapheresis. She was later started on Eculizumab biweekly with marked improvement in biochemical and clinical status. Prompt diagnosis and treatment of atypical HUS are crucial as the prognosis is poor if untreated. The diagnosis of atypical HUS can be challenging as the classic triad of microangiopathic hemolytic anemia, thrombocytopenia, and acute kidney injury can be seen in all thrombotic microangiopathies, thus careful clinical and laboratory assessment is required to establish the diagnosis. The new treatment modality, Eculizumab, the anti-complement monoclonal antibody, has become the first-line therapy for treating atypical HUS.
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Potato (Solanum tuberosum L.) is one of the most important crops in maintaining global food security. Plant stand and yield are affected by production technology, climate, soil type, and biotic factors such as insects and diseases. Numerous fungal diseases including Neocosmospora rubicola, causing stem rot, are known to have negative effects on potato growth and yield quality. The pathogen is known to stunt growth and cause leaf yellowing with grayish-black stems. The infectivity of N. rubicola across a number of crops indicates the need to search for appropriate management approaches. Synthetic pesticides application is a major method to mitigate almost all potato diseases at this time. However, these pesticides significantly contribute to environmental damage and continuous use leads to pesticide resistance by pathogens. Consumers interest in organic products have influenced agronomists to shift toward the use of biologicals in controlling most pathogens, including N. rubicola. This review is an initial effort to carefully examine current and alternative approaches to control N. rubicola that are both environmentally safe and ecologically sound. Therefore, this review aims to draw attention to the N. rubicola distribution and symptomatology, and sustainable management strategies for potato stem rot disease. Applications of plant growth promoting bacteria (PGPB) as bioformulations with synthetic fertilizers have the potential to increase the tuber yield in both healthy and N. rubicola infested soils. Phosphorus and nitrogen applications along with the PGPB can improve plants uptake efficiency and reduce infestation of pathogen leading to increased yield. Therefore, to control N. rubicola infestation, with maximum tuber yield benefits, a pre-application of the biofertilizer is shown as a better option, based on the most recent studies. With the current limited information on the disease, precise screening of the available resistant potato cultivars, developing molecular markers for resistance genes against N. rubicola will assist to reduce spread and virulence of the pathogen.
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Malaria is the world's fatal parasitic disease. The ability to quickly and accurately identify malaria infection in challenging environments is crucial to allow efficient administration of the best treatment regime for human patients. If those techniques are accessible and efficient, global detection of Plasmodium species will become more sensitive, allowing faster and more precise action to be taken for disease control strategies. Recent advances in technology have enhanced our ability to diagnose different species of Plasmodium parasites with greater sensitivity and specificity. This literature review provides a summary and discussion of the current methods for the diagnosis and identification of Plasmodium spp. in human blood samples. So far not a single method is precise, but advanced technologies give consistent identification of a Plasmodium infection in endemic regions. By using the power of the recent methods, we can provide a broader understanding of the multiplicity of infection and or transmission dynamics of Plasmodium spp. This will result in improved disease control strategies, better-informed policy, and effective treatment for malaria-positive patients.