Coagulation Abnormalities in Severe Scrub Typhus and Their Association with Complications

Aim: To describe coagulation abnormalities and their association with complications in patients with severe scrub typhus. Materials and methods: A cohort study was conducted among all patients of severe scrub typhus [immunoglobulin M (IgM) positive] who reported to this facility from 1st August 2019 to 31st July 2020 and met our inclusion criteria. We estimated the incidence of severe thrombocytopenia (<50,000/µL) and overt disseminated intravascular coagulation (DIC) (DIC score of ?5). We determined the association [risk (RR) ratios] of these abnormalities with complications of scrub typhus, namely—septic shock, multiple organ dysfunction syndrome (MODS), and septic shock with MODS. Results: In total, 71 patients were studied with a mean age of 50 ± 15.5 years, of which 45 (63.4%) were females. On presentation, fever 70 (98.5%), myalgias 22 (31.0%), loose stools 13(18.3%), cough, vomiting, headache 11 (15.5%), altered sensorium 10(14.1%), and pain abdomen 9 (12.7%) were main symptoms. On examination, hypotension 31 (43.7%), eschar 25 (35.2%), icterus 17 (23.9%), and rash 16 (22.5%) were noted. The d-dimer (>0.5 µg/mL) levels were increased in all (100%) patients. Thrombocytopenia (91.5%) was the commonest hematological abnormality and 31 (43.6%) of them had severe thrombocytopenia, 25 (35.2%) patients had low fibrinogen levels (<200 mg/dL) and prothrombin time (PT >16.7 seconds) was prolonged in 20 (28.1%). A total of 42 (59.1%) patients developed MODS, 33 (46.4%) developed septic shock, 24 (33.8 %) had MODS with septic shock, 17 (23.9%) developed overt DIC, and eight (11.2%) died. Severe thrombocytopenia (p = ?0.028) and overt DIC (p = 0.045) were significantly associated with septic shock development. Conclusion: In the patients admitted with severe scrub typhus; thrombocytopenia was the commonest hematological abnormality. The development of septic shock was significantly associated with severe thrombocytopenia and overt DIC.

Pediatric scrub typhus in Indian Himalayas.

To retrospectively confirm the suspected rickettsial disease (Scrub typhus) using a gold standard diagnostic test i.e. microimmunofluorescence in pediatric patients with acute febrile illness of unknown etiology. Two serological tests, Weil-Felix and Microimmunofluorescence were used to confirm infection. All five children had fever, vomiting and generalized lymphadenopathy, but none had eschar or rash. One was cured with doxycycline, remaining four patients treated with azithromycin and one died despite treatment. Scrub typhus is a cause of fever of unknown origin in Himalayan region of India and azithromycin is an effective alternative to doxycycline in treating this disease.

Kala-Azar at high altitude.

Kala-azar or Visceral leishmaniasis (VL) is a disease of low altitude (approximately 500 meters mean sea level). In India, however cases have been reported from sub-Himalayan region (350-960 meters MSL) of Kumaon region of Uttaranchal. We present two patients of VL, natives of tribal district of Kinnnaur (2000-3000 meters MSL), Himachal Pradesh, who had never visited known endemic area for Leishmaniasis. These are probably first indigenous cases of VL being reported from an area situated at an altitude of 3000 meters and 2300 meters MSL.