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Introduction
Nocardiosis is considered an opportunistic infection affecting immunocompromised patients. The species N. otitidiscaviarum was considered a soil saprophyte until the first human infection was described 50 years after the identification of the species. Diabetes mellitus, human immunodeficiency virus (HIV) infection, and post-transplant status were the most common risk factors identified in previously described N. otitidiscaviarum infections. Only one reported case of infection due to this unusual species was associated with systemic lupus erythematosus (SLE).
To date, there are only 3 reported cases of intracranial artery aneurysm caused by nocardial infection. We are reporting a case of N. otitidiscaviarum infection in a young female with SLE presenting with disseminated nocardiosis. She had multiple complications including rupture of a cerebral artery aneurysm and pneumothorax.
Case presentation
A 29-year-old female was newly diagnosed with systemic lupus erythematosus (SLE). She had multi-organ involvement including autoimmune hemolytic anemia, cerebritis, lupus nephritis, cardiomyopathy with an ejection fraction of 33% and non-specific interstitial pneumonia. The patient was started on mycophenolate mofetil 1000 mg twice daily, hydroxychloroquine 200 mg once daily, and prednisolone 40 mg daily which was planned to be tapered over 8 weeks. She had to stay in hospital for 2 weeks due to the involvement of multiple organs and the slow response to treatment. Two weeks after her discharge from the hospital she started to experience a dry cough followed by fever, progressive shortness of breath, generalized body aches, nausea, vomiting, and skin rash. On examination, she looked thin and malnourished, with severe alopecia. Examination showed a temperature of 39.4 °C, heart rate 147 beats/minutes, respiratory rate of 24 cycles/minutes and blood pressure137/88 mm Hg. There were multiple skin pustules of different ages scattered over the upper limbs, lower limbs, back and abdomen ( Fig. 1 -A). Chest auscultation revealed reduced air entry at the right lung base and abdominal examination showed right upper quadrant tenderness. Investigations revealed normocytic normochromic anemia (hemoglobin level 6.8 g/L,normal range 12.0–15.0 g/L), leukocytosis (17.1 × 10 9 /L, normal range 4.0–10.0 10 9 /L) with neutrophilia (16.2 × 10/uL, normal range 2.0–7.0 10/uL), elevated C-reactive protein levels (218.7 mg/L, normal range 0.0–5.0 mg/L) and high procalcitonin (7.17 ng/mL). Anemia work up showed haptoglobin 518 mg/dL (normal range 30–200 mg/dL), lactic acid dehydrogenase 372 U/L (normal range 135–214 U/L), reticulocytes 1.5%. Regarding lupus disease activity, double stranded DNA antibodies was positive with titer of 25.00 IU/mL while complement 3 was 0.68 gm/L (normal range 0.90–1.80 gm/L) and complement 4 was 0.08 gm/L (normal range 0.10–0.40 gm/L). Chest X-ray showed consolidation with cavitation and pleural effusion in the right lower zone ( Fig. 1 -B). The fluid from skin pustules as well as sputum and blood samples were sent for microbiological studies. All cultures from sputum, broncho-alveolar lavage (BAL), skin pustules pus showed on gram stain branching, fine, delicate filaments with fragmentation, beaded gram-positive bacilli ( Fig. 1 -C). The modified Ziehl–Neelsen staining revealed partially acid-fast bacilli. N. otitidiscaviarum was identified by Matrix-Assisted Laser Desorption/Ionization-Time of Flight (MALDI-TOF). Epsilometer test (E test) was done to detect Minimum Inhibitory Concentration (MIC) of different antibiotics. The results were interpreted using the Clinical and Laboratory Standards Institute (CLSI) document M24. N. otitidiscaviarum isolate was susceptible to trimethoprim-sulfamethoxazole (TMP-SMX) (MIC 1 μg/mL), amikacin (MIC 2 μg/mL), ciprofloxacin (MIC 0.5 μg/mL), moxifloxacin (MIC 0.25 μg/mL) and linezolid (MIC 0.094 μg/mL). It was resistant to amoxicillin-clavulanate (MIC 32 μg/mL), ceftriaxone (MIC32 μg/mL) and clarithromycin (MIC 12 μg/mL). The MIC for meropenem was 0.38 μg/mL, but CLSI did not provide interpretation for meropenem in N. otitidiscaviarum.
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A computed tomography (CT) scan of the chest showed necrotizing pneumonia with lung abscess and pneumothorax in the left lung ( Fig. 2 -A). Few septic emboli also were visualized in left lung ( Fig. 2 -B). The images also revealed multiple collections in the liver spleen and kidneys ( Fig. 2 -C). Magnetic resonance imaging (MRI) of the brain showed numerous supra and infratentorial brain micro-abscesses with the largest involving the cerebellar vermis and the left para-median cerebellar hemisphere. These abscesses showed central diffusion restriction, peripheral enhancement, and internal enhancing septations ( Fig. 3 -A). A diagnosis of disseminated nocardiosis was taken and the patient was started on intravenous meropenem meningeal dose, TMP-SMX and amikacin. Imipenem was not available in the hospital pharmacy. The MIC for meropenem was low and previous Nocardial isolates from our hospital had shown good clinical response to regimens having meropenem. Hence decision was taken to include meropenem in treatment regimen after discussion with microbiologist. Three days later, the patient’s condition rapidly deteriorated with a decrease in her level of consciousness with a Glasgow coma scale (GCS) of 6/15, there was no neurologic deficit. Elective intubation was performed, and she was put on mechanical ventilation. A repeat imaging revealed intracranial hemorrhage and right frontal vascular malformation of 6 mm of diameter with a feeding vessel from the distal portion of the anterior cerebral artery and draining into a cortical vein ( Fig. 3 -B). The neurosurgery team was involved and they decided to do a lifesaving decompressive craniectomy and insertion of an external ventricular drain (EVD). The patient received intravenous antibiotics for a total of eight weeks and was then shifted to oral moxifloxacin and TMP-SMX which is planned for 10 months to complete 1 year of treatment. A CT of the brain done after 6 months of treatment showed complete resolution of the brain abscesses and a repeat chest Xray ( Fig. 3 -C) showed clearance of the initial changes. Despite the initiation of appropriate antibiotics and all supportive measurements, the patient continued to have low GCS level and remained ventilator-dependent, tracheostomized, and fed through a nasogastric tube.
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Discussion
Nocardia is a genus of aerobic bacteria in the order Actinomycetales. More than 100 species of Nocardia are identified [1] . The name Nocardia is derived from Edmond Nocard (1850–1903), a French veterinarian who first isolated members of this taxon [2] . Nocardia species (N. Spp) are weakly acid-fast bacilli. They are classified as gram-positive, but many strains have alternating positive and negative areas giving them a faint beaded appearance. They exhibit a characteristic filamentous branching with fragmentation into bacillary or coccoid forms. The species N . otitidiscaviarum was first identified in 1924 and was considered a soil saprophyte [3] . The first human infection due to N. otitidiscaviarum was reported in 1974 and was previously named Nocardia caviae [4] , [5] . N. otitidiscaviarum is an infrequent cause of human Nocardial infections. In some series of human nocardial infections, it accounted for only 0.3–2.9% of all Nocardia infections [5] . This rarity has been attributed to its low virulence and low prevalence in the soil as compared to other Nocardia [6] . N. spp is ubiquitous in soil, decaying vegetable matter, and aquatic environments. A study from Iran reported isolation of Nocardia in the water and soil samples of 19 out of 30 studied hospitals [7] . They can become airborne, and inhalation is the most common route of infection. Ingestion and cutaneous spread have also been reported as routes of entry. N. spp causes various diseases in humans as well as animals. More than 54 species have been reported to be clinically significant [8] .
Many risk factors predisposing to nocardial infections have been reported in the literature. Immunosuppression due to glucocorticoid therapy, malignancy, solid organ transplant and advanced HIV infection are the leading causes of nocardiosis [10] , [11] , [12] , [13] . In addition, diabetes mellitus, alcoholism, chronic granulomatous disease, structural lung disease, tumor necrosis factor-alpha inhibitor therapy, inflammatory bowel disease, chronic obstructive pulmonary disease and tuberculosis have been reported as risk factors for nocardial infection [14] . However, an increasing number of cases of nocardiosis have been reported in apparently immunocompetent individuals [9] . It is possible that they may have an unidentified underlying immunodeficiency.
Nocardia species can infect different organs. Nocardial infection usually presents as pneumonia, lymphocutaneous infection, mycetoma, brain abscess, or disseminated infection [15] . There are reports of septic arthritis [56] and bacteremia [16] , [21] caused by Nocardia . In a large series, isolated pulmonary involvement was the most frequent presentation accounting for 39% of all cases while 34% had disseminated disease involving two or more organs and the central nervous system (CNS) was involved in 44% of those with disseminated disease. Isolated CNS and cutaneous infection accounted for 9% and 8% of cases respectively. [15] The most common manifestation of CNS infection is brain abscess. There have been three reported cases of Nocardia causing aneurysms in intracerebral arteries [17] , [18] , [19] . One of these three patients had a background of SLE and was getting steroids while another one had multiple myeloma. All three of them responded well to surgical management along with a combination of antibiotics. The characteristics of these three cases are summarized in ( Table 1 ). To the best of our knowledge, there are 54 reported cases of human infections due to N. otitidiscaviarum . The details were reviewed and summarized in ( Table 2 ).
Table 1
Characteristics of the three reported cases of Nocardia associated intracranial aneurysm.
| Case number | Age | Sex | Comorbidity | Immunosuppressive drugs | Presentation | Coexisting pathology | Diagnostic method | Site of aneurysm | Subsequent procedure | Antibiotic regimen |
| 1 | 60 | Male | None | None | headaches, fatigue, memory loss, and behavioral abnormalities for 2–3 weeks before admission | Abscess | stereotactic aspiration of the abscess | internal carotid aneurysm | underwent drainage of the abscess with subsequent resection of the infected aneurysm. | 6 weeks of ceftriaxone and high-dose trimethoprim–sulfamethoxazole (TMP-SMX) |
| 2 | 69 | Male | Multiple myeloma | Bortezomib | Thoracic empyema alteration of consciousness with grade 3/5 right upper and lower extremity weakness | subarachnoid hemorrhage and multiple scattered small rim-enhancing lesions | Emergency clipping of the aneurysm which revealed necrotic aneurysm and thrombus occlusion at the left middle cerebral artery | Left middle Cerebral artery | . | (TMP-SMX,15 mg/kg/day) and ceftriaxone (4 g/day) |
| Lenalidomide | ||||||||||
| Dexamethasone | ||||||||||
| followed by TMP-SMX (15 mg/kg/day) and moxifloxacin (400 mg/day) 12 month | ||||||||||
| 3 | 28 | Female | SLE | Prednisolone | Headache Irritability nuchal rigidity | Cerebritis | Biopsy of Lesion | Right middle cerebral artery | Surgical excision of aneurysm with Bye pass | TMP-SMX 3 week |
| Cefotaxime +amikacin | ||||||||||
| 2 weeks Doxycycline 4 weeks |
Table 2
Reported cases of human infection with N otitidiscaviarum.
| Authors/year of publication | Age/gender | Risk factors | Affected site | Imaging modality/findings | Treatment /duration | Steroid use | Outcome | Reference |
| Princess I et al. 2018 | 51/M | Asthma | Lung | consolidation of the left lung with destruction of the left lung | TMP-SMX + imipenem | + | Died | [20] |
| Tajima K et al. 2018 | 66/M | Lymphoma | Lung + Meninges | Multiple nodular lesions in the lung | TMP-SMX+ linezolid | – | Recovered | [21] |
| The strain isolated from the CSF was identified as a N. otitidiscaviarum -type strain | ||||||||
| Thirouvengadame S Et al.,2017 | 65/M | None | Lung | infiltrative lesions in the middle zone of both lungs | TMP- SMX x 3 months | – | Recovered | [22] |
| Liu C et al. 2017 | 58/ M | hepatitis B virus Smoker | Lung | presence of nodules, masses, patchy consolidations, and bilateral pleural effusion | TMP-SMX + Amikacin + imipenem | – | Died | [23] |
| Sah R 2020 | 61/M | Nephrotic Syndrome | Lung + Skin | consolidation (mass-like lesion 3.5 × 3.5 cm) in the right upper lobe with right-sided pleural effusion and cystic lesion in the left upper lobe | TMP-SMX | + | Recovered | [24] |
| USG of thigh: pus collection in the right thigh | ||||||||
| Sadamatsu H et al. 2017 | 72/F | Asthma | Lung | irregularly shaped solid opacity in the right middle lobe, a cavitary mass in the left lower lobe and bronchiectasis in both lower lobes | Minocycline 4 weeks | + | Recovered | [25] |
| Levofloxacin 6 months | ||||||||
| Deepa R et al. 2016 | 14/F | Rheumatic heart disease | Lung | right lower lobe consolidation and right sided pleural effusion | Death Prior to identification | – | Died | [26] |
| Jiang Y et al. 2016 | 37/M | None | Lung + Liver + Neck mass | consolidation in the upper lobe of right lung, multiple nodules in both lung and right pleural effusion. | Minocycline TMP-SMX | – | Recovered | [9] |
| Simmons BP et al. 1992 | 60/M | Heart transplant | Lung + skin and soft tissue | Only abstract accessible | Imipenem/cilastatin and TMP-SMX and doxycycline | – | Recovered | [27] |
| Castelli et al . , 1994 | 31/M | HIV, Trauma | Skin and soft tissue + brain | Hypodensity in the right fronto- temporal and in the left temporo-parietal areas of probable inflammatory origin | TMP-SMX | – | Died | [28] |
| Clark et al . , 1995 | 86/M | Trauma | Skin | Vertebral Fracture | TMP-SMX x 10 weeks | + | Recovered | [29] |
| Suzuki et al . , 1995 | 78/F | Asthma | Skin + Lymph node | None | Minocycline + Doxycycline | + | Recovered | [30] |
| Mereghetti et al . , 1997 | 31/M | Trauma | Skin | There were no radiological sign of osteomyelitis. | Surgery, IV TMP-SMX +imipenem x 3 weeks. Then TMP-SMX x 3 weeks | – | Recovered | [31] |
| Sandre et al . , 1997 | 59/M | HIV | Chest wall + Lung + Abdomen | large septated extraperitoneal mass crossing both inside and outside the left thoracic and abdominal wall | Surgery, TMP/SMX + amikacin x 6 weeks | – | Recovered | [32] |
| Taniguchi et al . , 1998 | 76/M | Tuberculosis | Lung | Diffuse reticulonodular shadows on both lung fields | TMP-SMX x 6 months | – | Recovered | [33] |
| Hartmann et al . , 2000 | 50/F | Renal Transplant | Brain | a multilocular expanding process in the right frontal lobe with edema and some displacement of the midline structures | Meopenem + rifampicin X 6 weeks. Oral ciprofloxacin + rifampicin for 2 months. | + | Recovered | [34] |
| Duran et al . , 2001 | 21/M | IV drug | Brain | upper-posterior parietal right-sided cystic mass | imipenem + TMP-SMX | + | Recovered | [35] |
| Wada et al . , 2002 | 69/F | Trauma | Skin+ Lyph nodes | None | TMP-SMX | – | Recovered | [36] |
| 6 months | ||||||||
| Jennifer et al . , 2002 | 77/M | Rheumatoid arthritis, chronic bronchitis, Hypertension,trauma | Skin | None | Minocycline+ Clarithromycine 6 months | + | Recovered | [37] |
| Dikensoy et al . , 2004 | 65/M | None | Lung | multiple cavitary/non‐cavitary nodules throughout the right lung and a large consolidation consisting cavitating areas on the lower two‐third of the left lung | IV Amikacin + TMP-SMX x 1 month TMP-SMX 4 months | – | Recovered | [38] |
| Hemmersbach et al . , 2004 | 44/M | Renal Transplant, Diabetes | Brain | 3 contrast enhancing lesions with enhancement localized in the frontal lobe, parietal lobe and the cerebellum | TMP-SMX 4 month | – | Died | [39] |
| Yoshida et al . , 2004 | 69/M | Rheumatoid arthritis | Lung | also showed the presence of fluid encap-sulated by an irregularly thickened pleural membrane | TMP-SMX + Levofloxacin +Gentamicin | + | Recovered | [40] |
| Fabre et al . , 2005 | 70/M | Rheumatoid arthritis, Infliximab | Skin | CT head and Lung Normal | Ofloxacin + Clindamycin | + | Recovered | [41] |
| Sharma et al . , 2007 | 36/F | Sickle Cell, End Stage Renal Disease | Lung Blood | multiple pulmonary nodules scattered throughout both lung fields | Amikacin + Gatifloxacin | – | Recovered | [16] |
| Thoms et al . , 2007 | 55/M | None | Skin | A computed tomographic (CT) scan of the left leg excluded any muscle or bone involvement | TMP-SMX + Amikacin Imipenem | – | Recovered | [42] |
| Pelaez et al . , 2009 | 85/F | Chronic Obstructive Pulmonary Disease | Disseminated. Lung brain | interstitial distribution of multiple pulmonary nodules, fluid in the major fissure, and a small pleural effusionThree nodular lesions in the left frontoparietal lobe with perilesional vasogenic edema, | TMP-SMX Imipenem Linezolid | – | Died | [43] |
| Betran et al . , 2010 | 57/M | Diabetes, Thrombocytopenia | Lung | consolidation throughout the lower right lobe and one nodule compatible with cavitary pneumonia. | TMP-SMX | – | Recovered | [44] |
| Chen et al . , 2011 | 51/M | None | Skin, Soft tissue | MRI revealed extensive inflammatory change with multiple focal fluid collections. Some of these lesions showed a central tiny hypointense focus, resulting in the dot‐in‐circle sign | TMP-SMX PO x 1year | – | Recovered | [45] |
| Ramamoorthi et al . , 2011 | 36/M | None | Lung | Peripheral pleural based thin walled cavitatory lesion with irregular inner margins, measuring 4.3 cm × 2.8 cm × 5.5 cm in the apico posterior segment of the left upper lobe. | TMP-SMX x 6 months | + | Recovered | [46] |
| Praveen et al . , 2014 | 60/M | Chronic obstructive pulmonary disease, trauma | Subcutaneous, soft tissue | Chest X-ray revealed increased bronchovascular markings in para-hilar region with emphysematous changes | Amikacin + linezolid for 4 weeks then Oral linezolid for 8 weeks | + | Recovered | [47] |
| Douedi S et al. 2020 | 56/M | Diabetes | Skin | venous thrombosis of cephalic vein and abscess formation within the soft tissue of right axilla | TMP-SMX for 3 months | – | Recovered | [48] |
| Scheelje Carabelli et al. 2019 | 89/F | Asthma, Bronchiectasis | Lung | right hydropneumothorax and areas of consolidation | cotrimoxazole, amikacin, + imipenem | + | Died | [49] |
| Paniagua-García M et al. 2019 | 57/M | Diabetes mellitus, Chronic obstructive pulmonary disease | Lung Brain Skin | Right pleural effusion with diffuse thickening of the pleural layers, suggestive of empyema | TMP-SMX Linezolid | – | Died | [50] |
| Saksena R et al. 2020 | 70/F | None | Lung | None described | TMP-SMX | – | Died | [51] |
| Magalhães GM et al. 2010 | 37/M | None | Hand | osteolytic lesion on the hand bones | TMP-SMX | – | Recovery | [52] |
| Yi-Chun Chen et al. 2013 | 61/M | Diabetes mellitus, Chronic liver disease | Lung | Pleural Effusion | No detail available | – | Died | [53] |
| Yi-Chun Chen et al. 2013 | 47/M | Diabetes Mellitus | Lung | Pleural Effusion | No detail available | – | Survived | [53] |
| Chung-Hao Huang et al. 2015 | 42/M | Cirrhosis | Lung | Pleural effusion | meropenem, TMP-SMX and amikacin. | + | Survived | [54] |
| Talwar P et al. 1989 | 50/F | None | Brain | Abscess | TMP-SMX +gentamicin, metronidazole | – | Died | [55] |
| Torre NP et al. 1991 | 75/M | Diabetes | Knee | Pleural Effusion | TMP-SMX + amoxycillin-clavulanate | – | Recovered | [56] |
| Lung | ||||||||
| Mufti P et al. 1995 | 10 days /male | Home delivery | Lung | consolidation of left lung with pleural effusion and cavitation | cefotaxime and amikacin | – | Died | [57] |
| Eren E et al. 2016 | 69/F | None | Brain Abdomen | bilateral multiple hemispheric lesions | Meropenem+Amikacin + | – | Recovered | [58] |
| TMP-SMX | ||||||||
| located in right parietal lobe with an intense edema | ||||||||
| Alteras I et al. 1986 | 39/F | None | Foot | No involvement of the bone | Isoniazide Tetracycline | – | Recovered | [59] |
| Alteras I et al. 1980 | 41/M | None | Foot | No involvement of the bone | Isoniazide Tetracycline | – | Recovered | [60] |
| Min-Hui Chi 2012 | 71/M | SLE | Foot | None described | Tetracycline +Imipenam+ Meropenem +Amikacin | + | Died | [61] |
| Girouard Y et al. 1987 | 60/M | None | Finger | No osteomyelitis | TMP-SMX | – | Recovered | [62] |
| Hachisuka H et al. 1989 | 82/M | None | Hand | Chest Xray normal | oral chloramphenicol (1500 mg/day) | Recovered | [63] | |
| Mahgoub A et al. 2016 | 41 /F | Asthma | Lung | bilateral asymmetrical patchy air space disease, consolidation on the middle lobe and bilateral pleural effusion, but no cavities | ceftriaxone 2 g IV twice daily +amikacin 500 mg IV twice daily + ciprofloxacin 500 mg orally twice daily. | – | Recovered | [64] |
| Salh B et al. | 65/M | Diabetes Mellitus | Lung | Patchy consolidation | Gentamicin, Sulfadimidine | + | Recovered | [65] |
| Liver Cirrhosis | ||||||||
| Yang LJ et al. 1993 | 63/M | Chronic Obstructive Pulmonary Diseases | Inguinal Lymphadenopathy | Enlarged lymph nodes in the left inguinal area, | oral TMP-SMX (80 and400mg), two tablets twice daily. | + | Recovered | [66] |
| Bradsher RW | 69/M | Head Trauma | Brain | right-sided inferior frontal mass | sulfisoxazole | – | Died | [67] |
| Saarinen KA et al. 2001 | 50/M | None | Chest Wall Axilla | irregular skin thickening and massive enlargement of the soft tissue of the right side of the thoracic wall | rifampicin and TMP-SMX | + | Recovered | |
| Pleural effusion and infiltration in the right lung were also observed |
There are many challenges in managing nocardial infection. On one hand, differentiating Nocardia species using biochemical characteristics is time-consuming and unreliable. On the other hand, genotypic methods of identifying N. spp including 16s ribosomal RNA sequencing and MALDI-TOF are fast, sensitive, and highly reliable. However, the non-availability of these facilities in many centers can delay the identification of causative agents. The treatment of Nocardia is challenging in the absence of prospective randomized trials to decide the most effective therapy for nocardiosis. The choice of antimicrobials is based on cumulative retrospective experience, results of investigations in animal models, and in vitro antimicrobial activity profiles. Antibiotics that are typically effective against N. spp include trimethoprim-sulfamethoxazole (TMP-SMX), amikacin, imipenem, and third generation cephalosporins (ceftriaxone and cefotaxime). However, antibiotic susceptibilities vary among isolates, and hence antimicrobial susceptibility testing is strongly recommended as there can be inter/intra-species variability in susceptibility patterns. Most of the frequently isolated species of Nocardia are found to be sensitive to TMP-SMX, imipenem, and linezolid and a combination of these agents may be used as empirical therapy. The Infectious Diseases Community of Practice of the American Society of Transplantation has published Guidelines on Nocardia infections in solid organ transplantation [69] . In the absence of other guidelines, the recommendations of this guideline can be extrapolated to other groups of patients with nocardiosis. They recommend TMP-SMX as first-line therapy in all patients with nocardiosis. Monotherapy is recommended for cutaneous as well as stable pulmonary disease. Imipenem, ceftriaxone, or linezolid are recommended agents when TMP-SMX cannot be used due to allergy or other causes. At least two agents (imipenem + amikacin or TMP‐SMX) are recommended for initial therapy in severe pulmonary infection, CNS involvement, and disseminated disease. This guideline states that the use of three drugs for life-threatening diseases can be considered as a weak recommendation. They recommend at least 12-month therapy for cerebral nocardiosis and to ensure resolution of lesions radiographically prior to stopping therapy. Surgical intervention may be needed in several settings in nocardiosis. For instance, cerebral abscesses, empyema, and mediastinal fluid collections are some conditions necessitating surgical intervention. Brain abscess of greater than 2.5 cm size is considered as an indication for aspiration. A clinical pathway published in 2014 recommends craniotomy for nocardial brain abscess in those with systemic infections and multiple brain lesions [70] . Literature shows few cases of Nocardia that had a benign course for years despite not receiving appropriate treatment [42] , [45] , [52] , [68] .
Conclusion
Disseminated N. otitidiscaviarum is an uncommon presentation. This is the fourth reported case of intracranial aneurysm reported due to Nocardia . Possibility of intracranial aneurysm has to be considered while managing patients with nocardial infections.
Our patient presented relatively late, had a complicated course requiring multiple procedures, and a poor outcome despite proper antibiotics use and supportive care. Physicians managing patients with SLE need to be aware of the possibility of uncommon infections with unusual presentation. Patients with SLE should be educated about their immunosuppressed state and the need to present early to health care facilities.
Funding
The authors received no financial support for the research, authorship, and/or publication of this article.
CRediT authorship contribution statement
Jabeed Parengal: Conceptualization, Visualization, Writing – original draft, Data curation. Seham Mohsin Alebbi: data collection, data analysis, manuscript writing . Manal Mahmoud Mohamed Hamed: Investigation. Hosam Mohammed Alqatami: Investigation, Resources. Fatma Ben Abid: Conceptualization, Writing – review & editing, Supervision, Project administration.
Acknowledgements
The authors are indebted to Dr. Muna Al-Maslamani for her continuous support during the preparation of this manuscript. Open Access funding provided by the Qatar National Library
Declaration of conflict of interest
The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
Contributor Information
Jabeed Parengal, Email: JParengal@hamad.qa.
Seham Mohsin Alebbi, Email: SAlebbi@hamad.qa.
Manal Mahmoud Mohamed Hamed, Email: MHamed@hamad.qa.
Hosam Mohammed Alqatami, Email: Dr_hosam82@hotmail.com.
Fatma Ben Abid, Email: FAbid@hamad.qa.
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