Chetty M, Rakhi B, Rachana K, Sujatha S, Srinivasan GM. An Eight Year Clinico-Microbiological Retrospective Study on Brain Abscesses in India.
Microbiol Insights 2022;
15:11786361221106111. [PMID:
35784588 PMCID:
PMC9247994 DOI:
10.1177/11786361221106111]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 05/22/2022] [Indexed: 11/15/2022] Open
Abstract
Background:
Intracranial abscesses have been a diagnostic and therapeutic challenge since
time immemorial for both the microbiologists and the neurosurgeons. There is
paucity of detailed studies documenting the infecting organism causing brain
abscesses in South India.
Aims:
The study aimed at identifying and assessing the prevalence of aerobic,
anaerobic bacteria and fungi associated with brain abscesses at a tertiary
care hospital in South India.
Methods and Material:
Eight years data was collected from the records of culture reports from 2007
to 2010 and 2013 to 2018. The corresponding clinical case records were
retrieved for the assessment of risk factors. Risk factors of brain abscess
development were assessed based on clinical cases records.
Results:
Data from 140 brain abscess cases obtained over a period of 8 years were
analyzed. Out of the 140 samples, 66 (47.14%) were culture positive in which
33 (50%) had single aerobic/facultative anaerobic bacteria, 20 (30.3%) had
mixture of more than one aerobic/facultative anaerobic bacteria, 12 (18.18%)
had single obligate anaerobic bacteria and 1(1.5%) sample had
Mycobacterium tuberculosis isolated. Among the total 92
isolates, Pseudomonas aeruginosa (21/92, 23%) and
Staphylococcus aureus (20/92, 22%) predominated.
Bacteroides fragilis group was the most common obligate
anaerobe isolated. There were no fungal isolates. As there were various
isolates isolated, hence there is heterogeneity of isolates detected
Neuroanatomically, parietal lobe (45/140, 32%) was the most common location.
Otogenic infection was the major risk factor for parietal and temporal lobe
abscess (P value < .05).
Conclusions:
It has become essential for the microbiologists to be aware of unusual
isolates from brain abscess and its complex nature. Obscurity and difficulty
in their microbiological diagnosis calls for more such detailed studies.
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