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cryptococcal meningitis isolation precautions

Fifteen percent of patients in the placebo arm developed CNS relapse compared with no relapses in the fluconazole group. Options. These cookies may also be used for advertising purposes by these third parties. Meningitis can be caused by different germs, including bacteria, fungi, and viruses. In a large analysis of patients from 1998 to 2007, the overall mortality rate in those with bacterial meningitis was 14.8%.1 Worse outcomes occurred in those with low Glasgow Coma Scale scores, systemic compromise (e.g., low CSF white blood cell count, tachycardia, positive blood cultures, abnormal neurologic examination, fever), alcoholism, and pneumococcal infection.1113,16 Mortality is generally higher in pneumococcal meningitis (30%) than other types, especially penicillin-resistant strains.12,48,49 Viral meningitis outside the neonatal period has lower mortality and complication rates, but large studies or reviews are lacking. Yet, because of the potentially grave consequences of overlooking this illness, it is imperative to assess AIDS patients with pneumonia for possible fungal infection. Currently, these tests are unavailable in many parts of the world. Infections and other disorders affecting the brain and spinal cord can activate the immune system, which leads to inflammation. Options. Recommendations. Thank you for submitting a comment on this article. When flucytosine was added to amphotericin B as combination therapy, overall outcome of therapy was improved and the duration of treatment could be reduced from 10 weeks to 46 weeks, depending on the status of the host [1, 3]. Intravenous fluids may be beneficial within the first 48 hours, but further study is needed to determine the appropriate intravenous fluid management.35 A meta-analysis of studies with variable quality in children showed that fluids may decrease spasticity, seizures, and chronic severe neurologic sequelae.35 The next urgent requirement is initiating empiric antibiotics as soon as possible after blood cultures are drawn and the LP is performed. Learn more about potential causes and risk. Bacterial meningitis is a medical emergency that requires prompt recognition and treatment. CDC twenty four seven. The goal of treatment is cure of the infection and prevention of dissemination of disease to the CNS. Although no retrospective or prospective studies have been conducted to investigate treatment options for such patients, they should probably be treated with antifungal therapy (AIII). Early, appropriate treatment of non-CNS pulmonary and extrapulmonary cryptococcosis in HIV-infected patients reduces morbidity and prevents progression to potentially life-threatening CNS disease. All Rights Reserved. A lab will test this fluid to find out if you have CM. CSF examination and viral isolation or serology. Adverse effects from fluconazole monotherapy at 400 mg daily are uncommon. Standard Precautions Recommendations, Table 5. However, there are considerable side effects from flucytosine (150 mg/kg/d) when given in combination with fluconazole for 10 weeks in patients with HIV-associated cryptococcal meningitis [16]. Patients should initially undergo daily lumbar punctures to maintain CSF opening pressure in the normal range. Meningitis - Diagnosis and treatment - Mayo Clinic Oral fluconazole, 200 mg/d, is the most effective maintenance therapy for AIDS-associated cryptococcal meningitis [17, 24] (AI). Focal neurological signs may reflect mass lesions. Vaccination against the most common pathogens that cause bacterial meningitis is recommended. HSV and varicella zoster viral polymerase chain reaction testing should be used in the setting of meningoencephalitis. Let's discuss when to get it and possible side effects: Learn how COVID-19 could lead to meningitis in rare cases and what it may mean for your treatment and outlook. The desired outcome is continued absence of symptoms associated with cryptococcal meningitis and resolution or stabilization of cranial nerve abnormalities. During this procedure, youll lie on your side with your knees close to your chest. HSV meningitis can present with or without cutaneous lesions and should be considered as an etiology in persons presenting with altered mental status, focal neurologic deficits, or seizure.15, The time from symptom onset to presentation for medical care tends to be shorter in bacterial meningitis, with 47% of patients presenting after less than 24 hours of symptoms.16 Patients with viral meningitis have a median presentation of two days after symptom onset.17. Costs. Michael S. Saag, Richard J. Graybill, Robert A. Larsen, Peter G. Pappas, John R. Perfect, William G. Powderly, Jack D. Sobel, William E. Dismukes, Mycoses Study Group Cryptococcal Subproject, Practice Guidelines for the Management of Cryptococcal Disease, Clinical Infectious Diseases, Volume 30, Issue 4, April 2000, Pages 710718, https://doi.org/10.1086/313757. Treatment decisions should not be based routinely or exclusively on cryptococcal polysaccharide antigen titers in either the serum or CSF [31, 34] (AI). You can review and change the way we collect information below. Let's look at the symptoms to know. Cryptococcal Meningitis Article - StatPearls For otherwise healthy hosts with CNS disease, standard therapy consists of amphotericin B, 0.71 mg/kg/d, plus flucytosine, 100 mg/kg/d, for 610 weeks. Preventing relapse of cryptococcosis reduces mortality and morbidity and slows the progression of HIV disease. Fungal meningitis: Causes, symptoms, treatment, and more Recommendations. CDC twenty four seven. Academic Pulmonary Sleep Medicine Physician Opportunity in Scenic Central Pennsylvania, MEDICAL MICROBIOLOGY AND CLINICAL LABORATORY MEDICINE PHYSICIAN, CLINICAL CHEMISTRY LABORATORY MEDICINE PHYSICIAN, Copyright 2023 Infectious Diseases Society of America. Specific recommendations for the treatment of non-HIV-associated cryptococcal pulmonary disease are summarized in table 1. As the overall incidence of cryptococcal disease has increased so has the number of treatment options available to treat the disease. Use eye/face protection if aerosol-generating procedure performed or contact with respiratory secretions anticipated. Acetozolamide and mannitol have not been shown to provide any clear benefit in the management of elevated intracranial pressure resulting from cryptococcal meningitis (DIII). Dexamethasone should be given before or at the time of antibiotic administration to patients older than six weeks who present with clinical features concerning for bacterial meningitis. Transmission Precautions | Appendix A | Isolation Precautions By far the most common presentation of cryptococcal disease is cryptococcal meningitis, which accounts for an estimated 15% of all AIDS-related deaths globally, three quarters of which are in sub-Saharan Africa. 2023 Healthline Media LLC. In patients with more severe disease, amphotericin B should be used until symptoms are controlled, then an oral azole agent, preferably fluconazole, can be substituted (BIII). Patients with meningitis present a particular challenge for physicians. Pilot studies that have investigated fluconazole with flucytosine as initial therapy yielded unsatisfactory outcomes [7]. You will be subject to the destination website's privacy policy when you follow the link. The authors thank Thomas Lamarre, MD, for his input and expertise. Patients are usually treated with two antifungal agents and the . It grows in the debris around the base of the eucalyptus tree. Uniform success cannot be anticipated with existing therapy; however, since the mortality associated with cryptococcal meningitis can be up to 25% among persons with AIDS, the use of therapies that result in even modest levels of success are worthy. This guideline is part of a series of updated or new guidelines from the IDSA that will appear in CID. After the 2-week period of successful induction therapy, consolidation therapy should be initiated with fluconazole (400 mg orally once daily) administered for 8 weeks or until CSF cultures are sterile [11] (AI). Patients with a positive culture at 2 weeks may require a longer course of induction therapy. Cookies used to make website functionality more relevant to you. These cookies perform functions like remembering presentation options or choices and, in some cases, delivery of web content that based on self-identified area of interests. Objectives. Options. Ventriculoperitoneal shunts may become secondarily infected with bacteria; however, this is an uncommon complication. People with advanced HIV should be tested early for cryptococcal infection. Classic symptoms of pneumonitis, including cough, fever, and sputum production, may be present, or pleural symptoms may predominate. If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance. Respiratory syncytial virus, parainfluenza virus, adenovirus, influenza virus, Contact plus Droplet Precautions; Droplet Precautions may be discontinued when adenovirus and influenza have been ruled out, Abscess or draining wound that cannot be covered, If positive history of travel to an area with an ongoing outbreak of VHF in the 10 days before onset of fever. Cryptococcal meningitis is a fungal infection that usually affects people with a weakened immune system. Cryptococcal meningitis | British Medical Bulletin | Oxford Academic Immunocompromised patients with non-CNS pulmonary and extrapulmonary disease should be treated in the same fashion as patients with CNS disease [4, 6] (AIII). HIV-infected patients with elevated intracranial pressure do not differ clinically from those with normal opening pressure, except that neurological manifestations of disease are more severe among those with higher pressures [21, 22]. These materials are intended to support cryptococcal screen-and-treat programs. Examination findings that may indicate meningeal irritation include a positive Kernig sign, positive Brudzinski sign, neck stiffness, and jolt accentuation of headache (i.e., worsening of headache by horizontal rotation of the head two to three times per second). The organism has a strong predilection for infecting the CNS; however, infection has been reported in virtually every organ in the body. Similarly, HIV-negative patients may have elevated CSF pressure associated with meningeal inflammation, crypto-coccomas, and either communicating or, very rarely, obstructive hydrocephalus. When the CSF pressure is normal for several days, the procedure can be suspended. During the early 1970s, flucytosine was established as an orally bioavailable agent with potent activity against C. neoformans; however, this activity was lost rapidly because of the development of resistance when the drug was used as monotherapy [2]. Lumbar punctures are relatively inexpensive. The cause determines if it is contagious. Immunocompetent patients who present with mild-to-moderate symptoms should be treated with fluconazole, 200400 mg/d for 612 months [3, 4] (AIII). Among patients with HIV infection and cryptococcal meningitis, induction therapy with amphotericin B (0.71 mg/kg/d) plus flucytosine (100 mg/kg/d for 2 weeks) followed by fluconazole (400 mg/d) for a minimum of 10 weeks is the treatment of choice. In cases of extrapulmonary, non-CNS disease, resolution of lesions is the desired outcome. The goal of treatment is control of the infection and prevention of dissemination of disease to the CNS. Additional costs are accrued for daily, weekly, and monthly monitoring of therapies associated with most of the recommended regimens. All information these cookies collect is aggregated and therefore anonymous. Because clinical findings are also unreliable, the diagnosis relies on the examination of cerebrospinal fluid obtained from lumbar puncture. Its far more common in people with HIV or AIDS patients in Sub-Saharan Africa, where people with this disease have a mortality rate thats estimated to be 50 to 70 percent. Costs. If your tests come back negative for CM for two weeks, your doctor will probably ask you to stop taking amphotericin B and flucytosine. In each case, careful assessment of the CNS is required to rule out occult meningitis. Among patients with normal baseline opening pressure (<200 mm H2O), a repeat lumbar puncture should be performed 2 weeks after initiation of therapy to exclude elevated pressure and to evaluate culture status. Options. Toxic side effects from amphotericin B are common. Salmonella meningitis is a kind of bacterial meningitis that can be dangerous if not treated. Airborne Precautions if pulmonary infiltrate, Airborne Precautions plus Contact Precautions, if potentially infectious draining body fluid present, Petechial/ecchymotic with fever (general). Cryptococcal Meningitis: Causes, Symptoms, and Diagnosis Cryptococcal meningitis : a deadly fungal disease among people living Meningitis is an infection and inflammation of the meninges, which are the membranes that cover the brain and spinal cord. Serum procalcitonin, serum C-reactive protein, and CSF lactate levels can be useful in distinguishing between aseptic and bacterial meningitis.2833 C-reactive protein has a high negative predictive value but a much lower positive predictive value.28 Procalcitonin is sensitive (96%) and specific (89% to 98%) for bacterial causes of meningitis.29,30 CSF lactate also has a high sensitivity (93% to 97%) and specificity (92% to 96%).3133 CSF latex agglutination testing for common bacterial pathogens is rapid and, if positive, can be useful in patients with negative Gram stain if LP was performed after antibiotics were administered. People who have advanced HIV infection should be tested for cryptococcal antigen. Meningitis can also be caused by a variety of other organisms, including bacteria, viruses, and other fungi. Meningitis Treatment & Management - Medscape These cookies may also be used for advertising purposes by these third parties. The treatment for cryptococcal meningitis is intravenous administration of amphotericin B; may be used with or without 5-flucytosine. Meningitis can be caused by fungi, parasites, injury, or viral or bacterial infection. These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. In cases of CNS masses (cryptococcoma), resolution of lesions is the desired outcome. Appropriate antimicrobials should be given promptly if bacterial meningitis is suspected, even if the evaluation is ongoing. Relapse rates were 2% for fluconazole and 17% for amphotericin B. Acute bacterial meningitis must be treated right away with intravenous antibiotics and sometimes corticosteroids. National Institute of Allergy and Infectious Diseases Collaborative Antifungal Study, Treatment of cryptococcal meningitis associated with the acquired immunodeficiency syndrome, Liposomal amphotericin B (Ambisome) compared with amphotericin B followed by oral fluconazole in the treatment of AIDS-associated cryptococcal meningitis, Comparison of amphotericin B with fluconazole in the treatment of acute AIDS-associated cryptococcal meningitis, Intraventricular therapy of cryptococcal meningitis via a subcutaneous reservoir, Treatment of nonmeningeal cryptococcal disease in HIV-infected persons, Proceedings of the 91st annual meeting of the American Society for Microbiology (Dallas, TX), Fluconazole combined with flucytosine for cryptococcal meningitis in persons with AIDS, A comparison of itraconazole versus fluconazole as maintenance therapy for AIDS-associated cryptococcal meningitis, Fluconazole compared with amphotericin B plus flucytosine for the treatment of cryptococcal meningitis in AIDS: a randomized trial, Treatment of cryptococcosis with liposomal amphotericin B (AmBisome) in 23 patients with AIDS, Amphotericin B colloidal dispersion combined with flucytosine with or without fluconazole for treatment of murine cryptococcal meningitis, Elevated cerebrospinal fluid pressures in patients with cryptococcal meningitis and acquired immunodeficiency syndrome, Cerebrospinal fluid hypertension patients with AIDS and cryptococcal meningitis, Program and abstracts of the 37th Interscience Conference on Antimicrobial Agents and Chemotherapy (Toronto, ON, Canada), A placebo-controlled trial of maintenance therapy with fluconazole after treatment of cryptococcal meningitis in the acquired immunodeficiency syndrome, A controlled trial of fluconazole or amphotericin B to prevent relapse of cryptococcal meningitis in patients with the acquired immunodeficiency syndrome, Randomized trial of addition of lamivudine or lamivudine plus loviride to zidovudine-containing regimens for patients with HIV-1 infection: the CAESAR trial, A controlled trial of two nucleoside analogues plus indinavir in persons with human immunodeficiency virus infection and CD4 cell counts of 200 cells per cubic millimeter or less. Oxford University Press is a department of the University of Oxford. Cryptococcal antigen can be found in the body weeks before symptoms of meningitis. The evidence for corticosteroids is heterogeneous and limited to specific bacterial pathogens,3844 but the organism is not usually known at the time of the initial presentation. These cases are often viral, and enterovirus is the most common pathogen in immunocompetent individuals.2,4 The most common etiology in U.S. adults hospitalized for meningitis is enterovirus (50.9%), followed by unknown etiology (18.7%), bacterial (13.9%), herpes simplex virus (HSV; 8.3%), noninfectious (3.5%), fungal (2.7%), arboviruses (1.1%), and other viruses (0.8%).5 Enterovirus and mosquito-borne viruses, such as St. Louis encephalitis and West Nile virus, often present in the summer and early fall.4,6 HSV and varicella zoster virus can cause meningitis and encephalitis.2, Causative bacteria in community-acquired bacterial meningitis vary depending on age, vaccination status, and recent trauma or instrumentation7,8 (Table 29 ). In cases of extrapulmonary, non-CNS disease, resolution of symptoms and signs, as well as other markers of disease (e.g., radiographic abnormalities), is the desired outcome. Most people who develop CM already have severely compromised immune systems. Also, it is optional to continue fluconazole (200 mg/d) for 612 months (BIII). Search dates: October 1, 2016, and March 13, 2017. Lumbar puncture may be performed without computed tomography of the brain if there are no risk factors for an occult intracranial abnormality. . Prolonged external lumbar drainage places patients at major risk for bacterial infection. Benefits and harms. Treatment of tuberculous, cryptococcal, or other fungal meningitides is beyond the scope of this article, but should be considered if risk factors are present (e.g., travel to endemic areas, immunocompromised state, human immunodeficiency virus infection). Cryptococcal meningitis is a fungal infection of the tissues covering the brain and spinal cord. Older patients are less likely to have headache and neck stiffness, and more likely to have altered mental status and focal neurologic deficits11,13 (Table 31113 ). While awaiting the results of imaging studies, the serum should be tested for the presence of cryptococcal polysaccharide antigen. An alternative to this regimen is amphotericin B (0.71 mg/kg/d) plus 5-flucytosine (100 mg/kg/d) for 2 weeks, followed by fluconazole (400 mg/day) for a minimum of 10 weeks. Among HIV-infected patients with elevated CSF pressures, a poorer clinical response was noted among patients whose pressure increased between baseline and week 2 of treatment; benefit from management of intracranial pressure is inferred from reduced mortality in this population [22]. All information these cookies collect is aggregated and therefore anonymous. Recommendations. A summary of treatment recommendations for AIDS-associated cryptococcal meningitis is provided in table 2. Thus, itraconazole should be used in cases where the patient is intolerant of fluconazole or has failed fluconazole therapy (BI). GBS meningitis typically affects newborns but can affect adults too. What are the symptoms of cryptococcal meningitis? It furthers the University's objective of excellence in research, scholarship, and education by publishing worldwide, This PDF is available to Subscribers Only. HILLARY R. MOUNT, MD, AND SEAN D. BOYLE, DO. According to the British Medical Bulletin, 10 to 30 percent of people with HIV-related CM die from the illness. Three potential options exist for antifungal maintenance therapy: fluconazole, itraconazole, and weekly or biweekly amphotericin B. Outcomes. For those individuals with non-CNS-isolated cryptococcemia, a positive serum cryptococcal antigen titer >1 : 8, or urinary tract or cutaneous disease, recommended treatment is oral azole therapy (fluconazole) for 36 months. Repeating the LP can identify resistant pathogens, confirm the diagnosis if initial results were negative, and determine the length of treatment for neonates with a gram-negative bacterial pathogen until CSF sterilization is documented.7,47, Prognosis varies by age and etiology of meningitis. Most immunocompetent patients will be treated successfully with 6 weeks of combination therapy [1, 3] (AI); however, owing to the requirement of iv therapy for an extended period of time and the relative toxicity of the regimen, alternatives to this approach have been advocated. If you need to go back and make any changes, you can always do so by going to our Privacy Policy page. By this definition, almost three-fourths of 221 HIV-infected patients in a recent NIAID-sponsored Mycoses Study Group trial had elevated intracranial pressure at baseline. Although the ultimate impact from highly active antiretroviral therapy (HAART) is currently unclear, it is recommended that all HIV-infected individuals continue maintenance therapy for life. Last medically reviewed on December 11, 2017, Meningitis is an inflammation of the fluid and membranes surrounding the brain and spinal cord. Guidelines for The Diagnosis, Prevention and Management of Cryptococcal Cryptococcal meningitis. These pathogens include enterohemorrhagicEscherichia coliO157:H7,Shigella spp,hepatitis A virus, noroviruses, rotavirus,C. difficile. Your doctor will monitor you closely while youre on this drug to watch for nephrotoxicity (meaning the drug can be toxic to your kidneys). Bacterial meningitis. For full access to this pdf, sign in to an existing account, or purchase an annual subscription. The prevention of progression to cryptococcal meningitis is the principal goal of therapy in this population. Cryptococcal meningitis: Symptoms, causes, and treatment Airborne plus Contact Precautions plus eye protection. Patients with isolated or asymptomatic cryptococcal antigenemia without meningitis and low serum CrAg titers (i.e., <1:320 using LFA) can be treated in a similar fashion as patients with mild to moderate symptoms and only focal pulmonary cryptococcosis with fluconazole 400 to 800 mg per day (BIII). Therefore, the specific treatment of choice and the optimal duration of treatment have not been fully elucidated for HIV-negative patients. Combination therapy of amphotericin B and flucytosine will sterilize CSF within 2 weeks of treatment in 60%90% of patients [1, 3]. This fungus is found in soil around the world. Copyright 2017 by the American Academy of Family Physicians. Worldwide, nearly 152,000 new cases of cryptococcal meningitis occur each year, resulting in an estimated 112,000 deaths. Meningitis - Knowledge @ AMBOSS Most cases are . Fluconazole should be continued for life. The initial management strategy is outlined in Figure 1.7,9 Stabilization of the patient's cardiopulmonary status takes priority. Patients with the syndromes or conditions listed below may present with atypical signs or symptoms (e.g.neonates and adults with pertussis may not have paroxysmal or severe cough). Although some preliminary evidence suggests lower relapse rates of opportunistic infections when patients have been successfully treated with potent antiretroviral therapy, until proven otherwise, maintenance therapy for cryptococcal meningitis should be administered for life (AI). The symptoms of CM usually come on slowly. More Information. Patients in the amphotericin B group had significantly more relapses, more drug-related adverse events, and more bacterial infections, including bacteremia [24]. Patients with symptoms need treatment. Patients who tests positive for cryptococcal antigen can take antifungal medication to help the body fight the early stage of the infection. All patients should be monitored closely for evidence of elevated intracranial pressure and managed in a fashion similar to HIV-positive patients (see below). CM usually occurs in people who have a compromised immune system. However, cryptococcal meningitis is still a major problem where HIV prevalence is high and where access to healthcare may be limited. Maintenance therapy. Surgery should be performed for patients with persistent or refractory pulmonary or bone disease, but it is rarely needed. Durable Viral Suppression Among Young Adults Living with HIV Receiving Ryan White Services in New York City. Cryptococcal disease that develops in patients with HIV infection always warrants therapy. Outcomes. Meningitis is an infection and inflammation of the meninges, which are the membranes that cover the brain and spinal cord. Benefits and harms. Diagnosis of meningitis is mainly based on clinical presentation and cerebrospinal fluid analysis. Cryptococcal disease is an opportunistic infection that occurs primarily among people with advanced HIV disease and is an important cause of morbidity and mortality in this group. To further complicate the diagnostic process, physical examination and testing are limited in sensitivity and specificity. Costs. Among patients with AIDS- associated cryptococcal meningitis who are treated successfully, there is a high risk of relapse in the absence of maintenance therapy. These essential medications are often unavailable in areas of the world where they are most needed. If any test is positive for C. neoformans, then a CSF examination is recommended to exclude cryptococcal meningitis. These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. Objectives. Aggressive management of elevated intracranial pressure is perhaps the most important factor in reducing mortality and minimizing morbidity of acute cryptococcal meningitis. In conjunction with antiretroviral therapy, long-term maintenance antifungal therapy should be administered. Specific recommendations for the treatment of non-HIV-associated cryptococcal meningitis are summarized in table 1. One large cohort study found a 4.5% mortality rate and a 30.9% rate of complications, such as developmental delay, seizure disorder, or hearing loss, for childhood encephalitis and meningitis combined.50 Tuberculous meningitis also has a higher mortality rate (19.3%) with a higher risk of neurologic disease in survivors (53.9%).51 A recent prospective cohort study also found that males had a higher risk of unfavorable outcomes (odds ratio = 1.34) and death (odds ratio = 1.47).52, Complications from bacterial meningitis also vary by age (Table 71,11,12,46,5356 ). Placement of a ventriculoperitoneal shunt requires neurosurgical intervention with general anesthesia, which is an expensive, but potentially life-saving, procedure. Empiric antibiotics should be directed toward the most likely pathogens and should be adjusted by patient age and risk factors. This disease is rare in healthy people. CDC can also help provide customized resources on training and case studies for cryptococcal screening. Classic signs of meningeal irritation commonly are absent on physical examination, and routine laboratory assessment is rarely revealing. Beginning in the 1980s, orally bioavailable azole antifungal agents with activity against C. neoformans were introduced, in particular, itraconazole and fluconazole. Most people likely breathe in this microscopic fungus at some point in their lives but never get sick from it. Add Droplet Precautions for the first 24 hours of appropriate antimicrobial therapy if invasive Group A streptococcal disease is suspected, Centers for Disease Control and Prevention. However, the initial dose should be given earlier in the setting of a high-risk condition, such as functional asplenia or complement deficiencies, travel to endemic areas, or a community outbreak.60 There are also two available vaccines for meningococcal type B strains (MenB-4C [Bexsero] and MenB-FHbp [Trumenba]) to be used in patients with complement disease or functional asplenia, or in healthy individuals at risk during a serogroup B outbreak as determined by the Centers for Disease Control and Prevention.60. Meningitis is an inflammatory process involving the meninges. In selected cases, susceptibility testing of the C. neoformans isolate may be beneficial to patient management, particularly if a comparison can be determined between baseline and sequential isolates. Cryptococcal meningitis in an immunocompetent patient

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cryptococcal meningitis isolation precautions