First case of scrub typhus with meningoencephalitis from Kerala: An emerging infectious threat

K Saifudheen1, K G Sajeeth Kumar, James Jose

  • 1Department of Neurology, Medical College, Calicut, Kerala, India.

Insights

Scrub typhus meningoencephalitis, a brain infection caused by Orientia tsutsugamushi, is uncommon in Kerala, India. This report details two cases, highlighting diagnostic methods and patient outcomes in the region.

Area of Science:

  • Infectious Diseases
  • Neurology
  • Rickettsial Infections

Background:

  • Scrub typhus, caused by Orientia tsutsugamushi, is endemic in the Asia-Pacific region and reported across 11 Indian states.
  • Meningoencephalitis, a severe complication of scrub typhus, is underreported in Kerala, India.
  • Early diagnosis and treatment are crucial for managing scrub typhus meningoencephalitis.

Observation:

  • Two cases of scrub typhus meningoencephalitis were observed in northern Kerala.
  • Clinical presentation included characteristic eschar and positive Weil-Felix test results (> 1:320).
  • One patient experienced fatal respiratory failure, while the other showed significant improvement.

Findings:

  • Confirms the occurrence of scrub typhus meningoencephalitis in northern Kerala.
  • Demonstrates the utility of clinical signs and Weil-Felix testing in diagnosis.
  • Highlights the variable and potentially severe outcomes of the disease.

Implications:

  • Suggests a need for increased awareness and diagnostic vigilance for scrub typhus meningoencephalitis in Kerala.
  • Underscores the importance of prompt treatment to improve patient prognosis.
  • Contributes to the understanding of scrub typhus epidemiology and clinical spectrum in India.

Related Concept Videos

Encephalitis l: Introduction01:19

Encephalitis l: Introduction

Encephalitis is inflammation of the brain parenchyma, most often due to infections or autoimmune processes. It presents with neuropsychiatric features such as fever, altered mental status, behavioral changes, cognitive dysfunction, seizures, focal deficits, and sometimes autonomic instability. In some cases, the meninges are also involved, resulting in meningoencephalitis.Infectious CausesInfectious encephalitis is most commonly viral but can also result from bacterial, fungal, or parasitic...
Bacterial Meningitis I: Introduction01:22

Bacterial Meningitis I: Introduction

Bacterial meningitis is a severe, life-threatening inflammation of the meninges, particularly the pia mater and arachnoid mater, affecting the subarachnoid space, ventricles, and cerebrospinal fluid (CSF). If untreated, it can lead to significant neurological complications or death.Causative AgentsCommon pathogens vary with age and immune status. In adults, major organisms include Streptococcus pneumoniae, Neisseria meningitidis, and Haemophilus influenzae. Streptococcus agalactiae (group B...
Arboviral Encephalitis01:25

Arboviral Encephalitis

Arboviral encephalitis refers to brain inflammation caused by arthropod-borne viruses, particularly those transmitted through mosquito vectors. Among these, West Nile virus (WNV), a member of the Flaviviridae family, is a significant public health concern. WNV is an enveloped, positive-sense, single-stranded RNA virus. Human infection typically begins when an infected mosquito introduces the virus into the dermis during feeding. The primary transmission cycle involves birds as amplifying hosts...
Encephalitis ll: Pathophysiology01:26

Encephalitis ll: Pathophysiology

Encephalitis is inflammation of the brain parenchyma caused by direct viral invasion or immune-mediated mechanisms triggered by infections or tumors. Both processes lead to neuronal injury, disrupted neurotransmission, and diverse neurological symptoms, often with overlapping clinical and pathological features.Autoimmune EncephalitisIn autoimmune encephalitis, antibodies target neuronal antigens on cell surfaces, synapses, or within neurons. A key example is anti-NMDAR encephalitis, which can...
Viral Meningitis01:18

Viral Meningitis

Viral meningitis is the most common form of meningitis and is often referred to as aseptic meningitis to indicate the absence of bacterial involvement. It is generally milder than bacterial meningitis, with symptoms including fever, headache, stiff neck, drowsiness, nausea, photophobia, and vomiting. Rarely, more severe manifestations or death may occur. Common causative agents include enteroviruses, particularly coxsackie A and B viruses and echoviruses, all members of the Enterovirus genus...
Brain Abscess l: Introduction01:26

Brain Abscess l: Introduction

A brain abscess is a focal, intracerebral infection characterized by a localized collection of pus within the brain parenchyma, resulting from microbial invasion and the body’s inflammatory response. It progresses through stages: early and late cerebritis, followed by early and late capsule formation, reflecting tissue destruction, immune response, and eventual encapsulation.Etiology and PathogenesisCausative organisms vary with source and host factors, often involving polymicrobial infections,...