|Year : 2021 | Volume
| Issue : 3 | Page : 361-363
A rare case of cavitating lung disease
Rahul Kumar Gupta1, Arjun Kumar1, Mihir Gangakhedkar1, Vipul Prakash1, Lokesh Saini1, Prakhar Sharma1, Mukesh Bairwa2
1 Department of Pulmonary and Critical Care Medicine, All India Institute of Medical Science, Rishikesh, Uttarakhand, India
2 Department of Internal Medicine, All India Institute of Medical Science, Rishikesh, Uttarakhand, India
|Date of Submission||14-Jun-2021|
|Date of Decision||06-Aug-2021|
|Date of Acceptance||09-Aug-2021|
|Date of Web Publication||13-Sep-2021|
Dr. Arjun Kumar
Department of Pulmonary and Critical Care Medicine, All India Institute of Medical Science Rishikesh, Uttarakhand
Source of Support: None, Conflict of Interest: None
Pantoea rarely causes infection in human lungs. Genus Pantoea is a rare pathogen causing opportunistic human infection in clinical practice. Among seven species of this rare organism, Pantoea agglomerans is the most common species in humans and is often associated with an occupational disease. Clinically, it may present with wound infection, abscess, catheter infection, pneumonia, and urinary system infection in immunocompromised individuals. However, there are no case reports of P. agglomerans causing cavitating lung disease in the past. Here, we report a case of a 67-year-old immunocompetent female who presented with cavitating lung lesions on chest imaging which were found to be associated with P. agglomerans leading to fatal outcomes. We emphasize on the unusual presentation, its course in the hospital, and importance of early recognition of this emerging bacterial infection causing fulminant human infections even in immunocompetent individuals.
Keywords: Immunocompetent, lung cavitation, Pantoea agglomerans
|How to cite this article:|
Gupta RK, Kumar A, Gangakhedkar M, Prakash V, Saini L, Sharma P, Bairwa M. A rare case of cavitating lung disease. Indian J Respir Care 2021;10:361-3
|How to cite this URL:|
Gupta RK, Kumar A, Gangakhedkar M, Prakash V, Saini L, Sharma P, Bairwa M. A rare case of cavitating lung disease. Indian J Respir Care [serial online] 2021 [cited 2021 Dec 2];10:361-3. Available from: http://www.ijrc.in/text.asp?2021/10/3/361/325890
| Introduction|| |
Pantoea infections are scarce in humans. Only a few cases have been reported in the past worldwide causing bacteremia, septic arthritis, skin, and soft tissue abscess. Pantoea agglomerans is an environmental Gram-negative aerobic bacillus mainly associated with plants which is now emerging as human infection. Human infections usually follow wound infection with plant materials or hospital-acquired infection in immunocompromised individuals. There is little known about their clinical manifestations and usually, they are rarely responsible for cavitating lung disease. Here, we report a case of a 67-year-old smoker female who presented with cavitating lung lesions which were found to be associated with P. agglomerans.
| Case Report|| |
A 67-year-old female presented to the emergency department with low-grade fever, irrelevant talk for 3 days and breathing difficulties, cough with expectoration, and generalized myalgia for 10 days.
As per her relative, she smoked hand-rolled tobacco products named bidi for the last 20 years. She had a progressive dyspnea. She did not have any history of seizure, headache, photophobia, vomiting, burning micturition, chest pain, orthopnea or paroxysmal nocturnal dyspnea, hemoptysis, rashes, Raynaud's phenomenon, oral ulcers, numbness, or weight loss.
At presentation, she was drowsy. Her blood pressure was 140/88 mmHg, pulse – 123/min, respiratory rate – 30/min, and oxygen saturation of 79% on room air. On examination, there were no pallor, cyanosis, lymphadenopathy, edema, and icterus. On auscultation, bilateral wheezes and crepitation were heard in basal lung areas.
All relevant blood investigations including blood culture were advised [Table 1] and [Table 2]. Hemogram revealed neutrophilic leukocytosis and moderate anemia. Arterial blood gas analysis was suggestive of type 1 respiratory failure. Her chest X-ray showed a bilateral cavitating lesion [Figure 1]. For further evaluation, contrast-enhanced computed tomography (CECT) with high-resolution cuts of the chest and abdomen was done which showed multiple thick-walled cavitating lesions in both lungs [Figure 2] with the possibility of vasculitis or metastasis. However, no abnormal findings were seen on the abdomen scan. In view of low mental status, CECT of the brain was obtained which was suggestive of age-related changes. She started on oxygen therapy, intravenous (IV) ceftriaxone and azithromycin, and deep-vein thrombosis prophylaxis with subcutaneous low-molecular weight heparin along with supportive management.
|Table 1: Blood investigation reports at presentation and in intensive care unit|
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|Figure 2: Computed tomography chest at different levels suggesting bilateral cavitating lesions of different sizes|
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Her echocardiography showed an ejection fraction of 45%, severe tricuspid regurgitation, and dilated right and left ventricle with no vegetations. Her fundoscopic examination was normal. She was given IV vancomycin and acyclovir in view of suspected meningitis. Her cerebrospinal fluid was acellular with normal biochemistry. Her vasculitis workup was negative, blood and urine culture did not show growth of any organism.
At the 6th day of illness, the patient developed a generalised tonic-clonic seizure. Her trachea was intubated due to her inability to maintain airway and she was shifted to the intensive care unit (ICU). She further developed hypernatremia and acute kidney injury followed by bilateral pleural effusion which was of an uncomplicated exudative nature.
Due to high suspicion of malignancy, an ultrasound-guided lung biopsy was obtained from the cavity lesion. It was blood and necrotic tissue and was negative for any bacterial and fungal growth. Her bronchoalveolar lavage (BAL) fluid, however, grew P. agglomerans which was sensitive to minocycline, tigecycline, and colistin. Acid-fast bacilli stain and GeneXpert for tuberculosis infection were negative. Computed tomography-guided biopsy from left lung lesion was done, but it was negative for malignant cells and did not show any organism on special stains and tissue culture. She was started on IV meropenem and later on colistin based on the culture report. The patient developed septic shock and multiorgan failure during the course of illness. Unfortunately, she developed cardiac arrest and succumbed to death.
| Discussion|| |
Cavitating lung lesions are caused by a variety of etiology. In our case, we considered various etiologies such as lung abscess, tuberculosis, fungal infection, vasculitis, malignancy, hydatid cyst, and pulmonary thromboembolism. Further on, CECT differential diagnosis was narrowed. Although we kept a strong possibility of metastasis or primary lung malignancy, these possibilities were ruled out on histopathology report of lung biopsy. Finally, her BAL fluid culture grew P. agglomerans which is a rare pathogen in humans.
Pantoea is a Gram-negative, nonencapsulated, nonspore-forming bacillus, previously known as Enterobacter agglomerans or Erwinia herbicola. They can be isolated from plants, soil, food, human feces, and the environment. Pantoea belongs to the family Enterobacteriaceae. It is different from the Enterobacter genus. Rarely, they have been shown to cause human infections. Most commonly infection occurs following a penetrating injury by vegetation.
There are seven Pantoea species identified: P. agglomerans (prototype species), Pantoea ananatis, Pantoea stewartii, Pantoea dispersa, Pantoea citrea, Pantoea terrea, and Pantoea punctata. Pantoea presented as lung infection, catheter-related infection, cholecystitis, or neonatal sepsis in various case reports. Lung cavities due to P. agglomerans are rare. There are scarce reports available worldwide.
Schmid et al. described a case of respiratory infections in a 71-year-old immunocompromised female patient with acute myeloid leukemia and multiple myeloma who developed a cavity lesion in the left lung with pleural effusion. Culture of BAL in this patient grew P. dispersa and the patient improved after adequate antibiotic (imipenem and gentamicin) therapy.
Hagiya and Otsuka described P. dispersa bacteremia caused by central line-associated bloodstream infection in a female patient with diabetes and cardiomyopathy. The pathogen was sensitive to ceftazidime, cefepime, and levofloxacin. She recovered after 4 weeks of cefepime therapy without recurrence of infection.
In India, Sengupta et al. reported the case of 2-day-old neonate presenting with recurrent generalized tonic-clonic seizure in the neonatal ICU. Blood culture was positive for Gram-negative bacilli. The organism was identified as P. agglomerans, susceptible to ceftriaxone, cefepime, meropenem, and colistin. Seizures subsided and the child was discharged in a stable condition on the 11th day.
Sarika et al. reported the case of a 25-year-old, healthy male, who presented with indurated swelling over the posterolateral aspect of his right thigh after trauma from a plant thorn where P. agglomerans was isolated on a culture of the excised muscle tissue.
In our case, the causative organism was P. agglomerans which is a rare pathogen in causing cavitating lung lesions. Although we were not able to identify causative sources, as the patient did not have any history of trauma by plant thorns even though he was a farmer. A high degree of suspicion is required in patients with lung cavities having a history of plant thorn injury. Early detection of the organism is the key to prevent fatal complications.
| Conclusion|| |
Pantoea species may be a rare cause of lung cavitation, but it can be a possible cause of fatal cavitary lung disease leading to severe sepsis and mortality. Early detection and appropriate antibiotic therapy can improve the overall outcome.
Declaration of patient consent
The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.
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Conflicts of interest
There are no conflicts of interest.
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[Figure 1], [Figure 2]
[Table 1], [Table 2]