Splenic infarct with scrub typhus: a rare presentation

Scrub typhus has a variety of clinical presentations ranging from asymptomatic to fever with chills, myalgias, hepatitis, gastric ulcerations and pancreatitis, all being attributed to disseminated vasculitis, with splenic infarction being a rare presentation. A 26-year man, a resident of north India, presented with an acute febrile illness and abdominal pain, computed tomography scan of the abdomen was suggestive of a splenic infarct. After ruling out other aetiology, a positive IgM (ELISA) for scrub typhus led to treatment with oral doxycycline, following which the patient was discharged symptom-free. Rarely can splenic infarction be attributable to scrub typhus; so far, five such cases have been reported in the published literature.

Download Full-text

Hyperferritinemia in children hospitalized with scrub typhus

Tropical Medicine and Health ◽

10.1186/s41182-021-00304-4 ◽

2021 ◽

Vol 49 (1) ◽

Author(s):

Vijai Williams ◽

Nisha Menon ◽

Prateek Bhatia ◽

Manisha Biswal ◽

Sreejesh Sreedharanunni ◽

...

Keyword(s):

Organ Dysfunction ◽

Scrub Typhus ◽

Tertiary Care ◽

Secondary Analysis ◽

Febrile Illness ◽

Late Presentation ◽

North India ◽

Risk Scores ◽

Early Presentation ◽

Igm Elisa

Abstract Background Hyperferritinemia is increasingly associated with mortality in sepsis. Studies estimating the prevalence of hyperferritinemia in pediatric scrub typhus are limited. Methods This was a secondary analysis of a prospective observational study (FERRIS) from a tertiary care teaching hospital in North India where 72 children with confirmed scrub typhus, 4 (5.5%) PCR positive, 55 (76.4%)-IgM ELISA positive, and 13 (18.1%)-both PCR and ELISA positive, were analyzed. Serum ferritin was measured in 62 children to identify the prevalence of hyperferritinemia and determine its association with mortality. Results Hyperferritinemia (> 500 μg/L) was seen in 72.6% [n = 45] children; 26 (41.9%) were mild (500–2000 μg/L), 13 (21%) were moderate (2000–10,000 μg/L), and 6 (9.7%) were severe (> 10,000 μg/L). Early presentation to hospital (≤ 7 days of febrile illness) had more survivors than late presentation (> 7 days). Non-survivors had significantly higher PRISM III, PELOD-2, hyperlactatemia, hypoalbuminemia, organ dysfunction, need for mechanical ventilation, and need of RRT. Ferritin had poor sensitivity and specificity in predicting survival with AUC of 0.56. Organ dysfunction and risk scores as PRISM III, PELOD 2, and VIS at admission were better predictors with AUC (95% CI) of 0.72 (0.56, 0.89), 0.77 (0.63, 0.92), and 0.90 (0.78, 1.0) respectively. Conclusions Hyperferritinemia is common in scrub typhus but it did not predict survival. Organ dysfunction and risk scores were better predictors of mortality than ferritin.

Download Full-text

Scrub typhus (Orientia tsutsugamushi), A rapidly spreading epidemic in Chennai - A standalone lab experience

International Journal of Bioassays ◽

10.21746/ijbio.2016.09.0021 ◽

2016 ◽

Vol 5 (09) ◽

pp. 4896

Author(s):

Sripriya C.S.* ◽

Shanthi B. ◽

Arockia Doss S. ◽

Antonie Raj I. ◽

Mohana Priya

Keyword(s):

Scrub Typhus ◽

Clinical Symptoms ◽

Clinical Manifestations ◽

Febrile Illness ◽

Orientia Tsutsugamushi ◽

The Past ◽

Igm Elisa ◽

The Mean ◽

Specific Symptoms ◽

Symptoms And Signs

Scrub typhus (Orientia tsutsugamushi), is a strict intracellular bacterium which is reported to be a recent threat to parts of southern India. There is re-emergence of scrub typhus during the past few years in Chennai. Scrub typhus is an acute febrile illness which generally causes non-specific symptoms and signs. The clinical manifestations of this disease range from sub-clinical disease to organ failure to fatal disease. This study documents our laboratory experience in diagnosis of scrub typhus in patients with fever and suspected clinical symptoms of scrub typhus infection for a period of two years from April 2014 to April 2016 using immunochromatography and IgM ELISA methods. The study was conducted on 648 patients out of whom 188 patients were found to be positive for scrub typhus. Results also showed that pediatric (0 -12 years) and young adults (20 – 39 years) were more exposed to scrub typhus infection and female patients were more infected compared to male. The study also showed that the rate of infection was higher between September to February which also suggested that the infection rate is proportional to the climatic condition. Statistical analysis showed that the mean age of the patients in this study was 37.6, standard deviation was 18.97, CV % was 50.45.

Download Full-text

Diagnostic Accuracy of the InBios Scrub Typhus Detect™ ELISA for the Detection of IgM Antibodies in Chittagong, Bangladesh

Tropical Medicine and Infectious Disease ◽

10.3390/tropicalmed3030095 ◽

2018 ◽

Vol 3 (3) ◽

pp. 95 ◽

Cited By ~ 7

Author(s):

Stuart Blacksell ◽

Hugh Kingston ◽

Ampai Tanganuchitcharnchai ◽

Meghna Phanichkrivalkosil ◽

Mosharraf Hossain ◽

...

Keyword(s):

General Population ◽

Diagnostic Accuracy ◽

Diagnostic Tests ◽

Scrub Typhus ◽

Febrile Illness ◽

High Sensitivity ◽

Immunofluorescence Assay ◽

Immunoglobulin M ◽

Regional Assessment ◽

Igm Elisa

Here we estimated the accuracy of the InBios Scrub Typhus Detect™ immunoglobulin M (IgM) ELISA to determine the optimal optical density (OD) cut-off values for the diagnosis of scrub typhus. Patients with undifferentiated febrile illness from Chittagong, Bangladesh, provided samples for reference testing using (i) qPCR using the Orientia spp. 47-kDa htra gene, (ii) IFA ≥1:3200 on admission, (iii) immunofluorescence assay (IFA) ≥1:3200 on admission or 4-fold rise to ≥3200, and (iv) combination of PCR and IFA positivity. For sero-epidemiological purposes (ELISA vs. IFA ≥1:3200 on admission or 4-fold rise to ≥3200), the OD cut-off for admission samples was ≥1.25, resulting in a sensitivity (Sn) of 91.5 (95% confidence interval (95% CI: 96.8–82.5) and a specificity (Sp) of 92.4 (95% CI: 95.0–89.0), while for convalescent samples the OD cut-off was ≥1.50 with Sn of 66.0 (95% CI: 78.5–51.7) and Sp of 96.0 (95% CI: 98.3–92.3). Comparisons against comparator reference tests (ELISA vs. all tests including PCR) indicated the most appropriate cut-off OD to be within the range of 0.75–1.25. For admission samples, the best Sn/Sp compromise was at 1.25 OD (Sn 91.5%, Sp 92.4%) and for convalescent samples at 0.75 OD (Sn 69.8%, Sp 89.5%). A relatively high (stringent) diagnostic cut-off value provides increased diagnostic accuracy with high sensitivity and specificity in the majority of cases, while lowering the cut-off runs the risk of false positivity. This study underlines the need for regional assessment of new diagnostic tests according to the level of endemicity of the disease given the high levels of residual or cross-reacting antibodies in the general population.

Download Full-text

Evaluation of a Genus Specific rGroEL 1-524 IgM-ELISA and Commercially ELISA Kits During Course of Leptospirosis in Thailand

10.21203/rs.3.rs-352195/v1 ◽

2021 ◽

Author(s):

Santi Maneewatchararangsri ◽

Galayanee Doungchawee ◽

Thareerat Kalambaheti ◽

Viravarn Luvira ◽

Ngamphol Soonthornworasiri ◽

...

Keyword(s):

Early Detection ◽

Early Diagnosis ◽

Screening Test ◽

Scrub Typhus ◽

Acute Infection ◽

Febrile Illness ◽

High Sensitivity ◽

Elisa Assay ◽

Igm Elisa ◽

Post Onset

Abstract This work, we developed a genus-specific rGroEL1-524 IgM-ELISA assay for using as screening diagnosis of suspected leptospirosis among acute undifferentiated febrile illness patients during acute fever. Ddiagnostic accuracies of rGroEL1–524 IgM-ELISA, and commercial Panbio IgM-ELISA, and Virion-Serion Classic IgG-ELISA were evaluated with Thai 107 leptospirosis sera, and 189 controls, compared to reference culture and/or MAT methods. Sensitivities were 91.7%, 59.6%, and 17.7% for acute- infection, and were 97.1%, 54.8%, and 9.7% for early detection at 1-3 days post-onset of symptoms (DPO1-3), and the specificities were 87.5%, 86.6%, and 74.8% among controls, respectively. The rGroEL1-524 IgM-ELISA had high sensitivity, at 95.9% and 91.2% among culture and MAT negative cases. Impaired specificity on scrub typhus, possibly from antibody-cross reaction to ortholog GroEL. Commercial Panbio IgM-ELISA had sensitivities of 50%, 63.2%, and 89.9% compared with culture, MAT-negative and single MAT-positive cases whereas Virion-Serion IgG-ELISA provided sensitivities of 13.3%, 10.5% and 71.4%, respectively. A rGroEL1-524 IgM-ELISA could be useful as a screening test for early diagnosis. The performance of the commercial ELISA suggests the applicability of IgM-ELISA for diagnosis, while IgG-ELISA is useful for seroprevalence surveys. However, confirmation by reference tests is recommended.

Download Full-text

Diagnostic evaluation of IgM ELISA and IgM Immunofluorescence assay for the diagnosis of Acute Scrub Typhus in central Nepal

10.21203/rs.2.10024/v5 ◽

2020 ◽

Author(s):

Rajendra Gautam ◽

Keshab Parajuli ◽

Tshokey Tshokey ◽

John Stenos ◽

Jeevan Bahadur Sherchand

Keyword(s):

Likelihood Ratio ◽

Predictive Value ◽

Gold Standard ◽

Scrub Typhus ◽

Febrile Illness ◽

Immunofluorescence Assay ◽

Acute Febrile Illness ◽

Central Nepal ◽

Igm Elisa ◽

Typhus Fever

Abstract Introduction Scrub typhus is an acute febrile illness caused by the obligate intracellular bacterium,Orientia tsutsugamushi. Given their affordability and ease of use, antibody based diagnostic assays can be important diagnostic tools for early detection of scrub typhus fever in resource poor countries like Nepal. Immunochromatography (ICT) and IgM ELISA are two of the routinely employed antibody based assays for diagnosis of Scrub typhus fever in Nepal, although the recommended gold standard diagnostic test is IgM Immunofluorescence assay (IFA). This study evaluated the InBios Scrub Typhus Detect™ Immunoglobulin M (IgM) ELISA and IgM Immunofluorescence assays in single serum sample at the time of admission. Methodology Study participants (1585 suspected cases), were enrolled based on acute febrile illness with suspected scrub typhus cases in central Nepal from April 2017 to March 2018. Blood sample was collected from the suspected patients of scrub typhus, presenting with acute febrile illness. IgM antibody to Orientia tsusugamushi was detected by using Scrub Typhus Detect™ Kit (In Bios International, USA) and an in-house IgM IFA (Australian Rickettsial Reference Laboratory, Geelong, Australia. The IFA assay was performed with the Gilliam, Karp, Kato strains and O. chuto antigens following the ARRL protocol. Result Statistical analysis of ELISA IgM results when compared to reference test, IgM IFA results demonstrated the following characteristics, sensitivity 84.0% (95%CI: 79.73%-87.68%), specificity 94.82% (95% CI: 93.43%-95.99%), positive likelihood ratio 16.21% (95% CI: 12.71%-20.67%), negative likelihood ratio 0.17% (95% CI: 0.13-0.21%), disease prevalence 22.08% (95% CI: 20.06%-24.21%), positive predictive value 82.12% (95% CI: 78.28-85.42%) and negative predictive value 95.44% (95% CI: 94.27%-96.38%) respectively. Conclusion The study indicated that the IgM ELISA has the sensitivity 84.0% (95% CI: 79.73%-87.68%) and specificity 94.82% (95% CI: 93.43%-95.99%). Although IgM IFA is considered the gold standard test for the diagnosis of scrub typhus cases, it is relatively expensive, requires trained personal and a microscope with fluorescence filters. Scrub typhus IgM ELISA with appropriate OD cut–off values may be the best alternative test and possible viable option for resource limited endemic countries like Nepal.

Download Full-text

Clinical presentation of scrub typhus during a major outbreak in central Nepal

Asian Journal of Medical Sciences ◽

10.3126/ajms.v8i4.17163 ◽

2017 ◽

Vol 8 (4) ◽

pp. 27-31 ◽

Cited By ~ 5

Author(s):

Arun Sedhain ◽

Gandhi R. Bhattarai

Keyword(s):

Acute Kidney Injury ◽

Scrub Typhus ◽

Clinical Manifestations ◽

Kidney Injury ◽

Continuous Variables ◽

Neurologic Manifestation ◽

Igm Elisa ◽

Clinical Presentations ◽

Tertiary Teaching ◽

Major Outbreak

Background: Scrub typhus, an emerging rickettsial disease caused by the organism Orientiatsutsugamushi, is associated with multi-organ involvement. We prospectively studied the clinical manifestations of the disease during a major outbreak in central part of Nepal.Aims and Objective: This study was carried out with an aim to analyze the clinical presentations, laboratory parameters, complications and outcomes of scrub typhus.Materials and Methods: A prospective observational study was conducted in the Department of Medicine in a tertiary teaching hospital. A total of 1398 patients admitted with acute febrile illness were subjected for Scrub Typhus Detect™ IgM ELISA test, among which 502 (35.90%) patients tested positive and were included in the study. Acute kidney injury was defined according to KDIGO guideline. Statistical analysis was done with SAS University Studio package using t-test for continuous variables and chi-square test for categorical variables.Results: Mean age of the patients was 30.37±18.81 years with 26.29% in the pediatric age group (<14 years). Females comprised of 55.98% of the patients. Majority (97.98%) of the patients were seen between July to November. Clinical presentations in the descending order of frequency were anorexia (55.18%), headache (53.39%), lymphadenopathy (15.73%), jaundice (13.35) and eschar (6.57%). Mean scrub typhus IgM ELISA value was 2.17. Leukocytosis was seen in 5.78% and thrombocytopenia in 66.73% of patients. Transaminitis was found in 80.68% of patients. Urinary abnormalities were recorded in 42.3% of patients. Acute kidney injury (AKI) was seen in 35.8% of patients followed by acute respiratory distress syndrome (24.1%), pneumonia (22.1%), shock (14.74%), neurologic manifestation (6.37%) and cardiac manifestations (4.38%). ICU admission was required for 18.73% of patients and 8.57% required ventilator support. Mortality rate was 1.79%.Conclusion: Scrub typhus, being an emerging vector borne infectious disease in Nepalese context, is associated with multiple organ involvement.Asian Journal of Medical Sciences Vol.8(4) 2017 27-31

Download Full-text

Splenic Infarction in a COVID-19 Patient without Respiratory Symptoms

Dubai Medical Journal ◽

10.1159/000521207 ◽

2022 ◽

pp. 1-4

Author(s):

Shaikha Al Suwaidi ◽

Baidaa Jasem Alakasheh ◽

Labib S. Al-Ozaibi

Keyword(s):

Respiratory Symptoms ◽

Thromboembolic Event ◽

Thrombotic Event ◽

Splenic Infarction ◽

Thromboembolic Events ◽

Computed Tomography Scan ◽

Contributing Factors ◽

Management Measures ◽

Healthy Female ◽

Tomography Scan

High rates of thromboembolic events have been seen in cases of COVID-19. Here, we report a case of 23-year-old previously healthy female presented with left-sided abdominal pain associated with vomiting. The computed tomography scan showed multiple ill-defined wedge-shaped low attenuating areas of the spleen, suggesting splenic infarction. In the absence of other thromboembolic contributing factors, we believe this was a thromboembolic event in splenic circulation in relation to COVID-19 infection. Our case adds to the evidence of an arterial thrombotic event in a noncritical COVID-19 patient, emphasizing the importance of addressing thromboembolism diagnosis and management measures to avoid potentially deadly consequences.

Download Full-text

Seroprevalence and clinical profile of scrub typhus in patients presenting with undifferentiated acute febrile illness in a tertiary care centre

Asian Journal of Medical Sciences ◽

10.3126/ajms.v12i4.33353 ◽

2021 ◽

Vol 12 (4) ◽

pp. 54-60

Author(s):

Reena Anie Jose ◽

Hyma Jose ◽

Anjali Anne Jacob ◽

Pramod Thomas ◽

Renu Mathew ◽

...

Keyword(s):

Scrub Typhus ◽

Laboratory Finding ◽

Tertiary Care ◽

Elevated Serum ◽

Febrile Illness ◽

Clinical Profile ◽

Bivariate Analysis ◽

Enzyme Linked Immunosorbent Assay ◽

Rickettsial Infections ◽

Igm Elisa

Background: Scrub typhus (ST) is a common Rickettsial infection which has been increasingly reported from the various states of southern part of India. Aims and Objective: With very few reports from Central Kerala, we aimed to study the seroprevalence of scrub typhus and its clinical profile. Materials and Methods: Patients presenting with acute undifferentiated febrile illness and other symptoms and signs of Rickettsial infections during a period of two years were included in this prospective study. Serodiagnosis of ST was based on a positive Scrub typhus IgM Enzyme Linked Immunosorbent Assay (ELISA) and/or agglutination for OXK in Weil Felix test. The cut-off for ELISA was calculated. The clinical and laboratory details of the positive patients were obtained and bivariate analysis was performed. Results: The cut-off for ST IgM ELISA was calculated and found to be 0.38. Of the 636 samples screened, 34 (5.3%) were positive for ST IgM ELISA. Out of the 34 positive samples, only 5 (0.8%) were positive by Weil Felix test. Most of the ST patients presented during the months of May to January. Rashes were observed in 8.8% of the ST patients and none had signs of eschar. The commonest clinical features included fever, myalgia (52.9%), nausea & vomiting (32.4%), headache (29.4%) and hepatosplenomegaly (29.4%). The commonest abnormal laboratory finding and complication observed were elevated serum transaminases (52.9%) and acute respiratory distress syndrome (17.6%) respectively. Conclusion: The seroprevalence of ST in Central Kerala was 5.3% using Weil Felix test and ST IgM ELISA.

Download Full-text

Infection-Associated Opsoclonus: A Retrospective Case Record Analysis and Review of Literature

Journal of Child Neurology ◽

10.1177/0883073820911327 ◽

2020 ◽

Vol 35 (7) ◽

pp. 480-484 ◽

Cited By ~ 1

Author(s):

Lokesh Saini ◽

Sumeet R. Dhawan ◽

Priyanka Madaan ◽

Renu Suthar ◽

Arushi Gahlot Saini ◽

...

Keyword(s):

Scrub Typhus ◽

Subacute Sclerosing Panencephalitis ◽

Acute Infection ◽

Tertiary Care ◽

Febrile Illness ◽

North India ◽

Brainstem Encephalitis ◽

Case Record ◽

Acute Cerebellitis

Opsoclonus, an uncommon clinical sign, and is often described in the context of opsoclonus myoclonus ataxia syndrome (OMAS). OMAS may be paraneoplastic or postinfectious. However, opsoclonus with or without OMAS may occur in association with a wide gamut of infections. Infection-associated opsoclonus/OMAS (IAO) needs recognition as a separate entity, since it demands relatively brief immunosuppression, symptomatic treatment, and has a better outcome. Case records of children, who presented with opsoclonus to a tertiary-care teaching hospital of North India over a period of 1 year (2017-2018), were reviewed. Those with opsoclonus in the setting of an acute infection/febrile illness (symptomatic opsoclonus; IAO) were included. Of 15 children with opsoclonus, 6 children [median age: 42 months (range: 8 months to 7 years); 2 boys] had opsoclonus associated with an infective or febrile illness. Additional clinical findings in these children included myoclonus (n = 2), ataxia (n = 4) and behavioral abnormalities (n = 4). All these patients had an associated neurologic or nonneurologic illness- scrub typhus (n = 1), tuberculous meningitis (n = 1), mumps encephalitis (n = 1), brainstem encephalitis (n = 1), acute cerebellitis (n = 1), and subacute sclerosing panencephalitis (SSPE, n = 1). Children with acute cerebellitis, brainstem encephalitis, and mumps encephalitis were treated with steroids while those with scrub typhus, tuberculosis, and SSPE were treated with antibiotics, antitubercular therapy, and Isoprinosine, respectively. None of them needed long-term maintenance immunotherapy. The evaluation for tumor was negative in all. Three of the 6 children are functionally normal at the last follow-up. Acute neuro infections may trigger opsoclonus. A careful analysis of clinical data and suitable investigations can help differentiate these children from those with OMAS. This distinction may avoid unwarranted long-term immunosuppression.

Download Full-text

Serological evidence of human leptospirosis in patients with acute undifferentiated febrile illness from Uttarakhand, India: A pilot study

Journal of Laboratory Physicians ◽

10.4103/jlp.jlp_121_18 ◽

2019 ◽

Vol 11 (01) ◽

pp. 011-016

Author(s):

Mohit Bhatia ◽

Pradeep Kumar ◽

Pratima Gupta ◽

Puneet Kumar Gupta ◽

Minakshi Dhar ◽

...

Keyword(s):

Pilot Study ◽

Scrub Typhus ◽

Tertiary Care ◽

Febrile Illness ◽

Immunoglobulin M ◽

Serological Evidence ◽

Serum Samples ◽

Malaria Parasites ◽

Human Leptospirosis ◽

Igm Elisa

Abstract CONTEXT: To the best of our knowledge, there are no reports of serological evidence of human leptospirosis from Uttarakhand state in India. AIMS: The aim of this study was to screen for serological evidence of leptospirosis in patients with acute undifferentiated febrile illness at a tertiary care teaching hospital in Uttarakhand. SETTINGS AND DESIGN: A pilot study was conducted from March to November 2017. SUBJECTS AND METHODS: Fifty-three adult patients who presented in Medicine outpatient Department with a history of fever of ≥7 up to 14 days duration with or without other associated symptoms such as a headache, rashes, myalgia, arthralgia, and conjunctival suffusion were enrolled in the study using convenience sampling technique. Blood samples of these patients were collected and subjected to peripheral smear examination for malaria parasites, dengue immunoglobulin M (IgM) immunochromatographic card test, IgM Typhidot, Leptospira and Scrub typhus IgM ELISA, respectively. Aerobic blood culture was performed in 24 cases. Relevant clinico-epidemiological details were obtained as per the pro forma formulated in accordance with the modified Faine’s criteria. STATISTICAL ANALYSIS USED: Descriptive statistics. RESULTS: The study population consisted of 50.94% of males and 49.06% of females with a mean age ± standard deviation of 34.2 ± 15.2 years. Fifty febrile patients had additional symptoms of which myalgia was the most common (81.1%) followed by arthralgia (22.6%). Peripheral smears of all patients were negative for malaria parasites. Dengue and Typhidot IgM positivity was observed in two and eight patients, respectively. Six and five patients were tested positive by leptospira and scrub typhus IgM ELISA, respectively. Salmonella Typhi was isolated from blood sample of only one patient. Serum samples of two patients showed dual positivity. All six leptospira seropositive patients satisfied modified Faine’s criteria. CONCLUSIONS: Leptospirosis is a seemingly unexplored infection in Uttarakhand and should be considered as a differential diagnosis in patients with acute undifferentiated febrile illness.

Download Full-text