ClinicalTrials.gov: NCT02763462
Collaborator: NIAID -HIH
Status: Completed
https://clinicaltrials.gov/study/NCT02763462
The AFIRE prospective observational cohort study enrolled 1,492 acute febrile patients (864 adults, 628 children) requiring hospitalization from July 2013 to June 2016. Inclusion criteria consisted of axillary body temperature ≥38˚C, ≥1 year of age, and hospitalization within the past 24 hours. Demographic, clinical, and laboratory data, including hematology results, were collected at enrollment, once during days 14-28, and three months after enrollment. Blood and other biological specimens were collected at each study visit, and each participant had aerobic blood cultures performed at enrollment. Microbial etiologies were identified in 1,003 (67.5%) participants and included dengue virus (467, 46.6%), Salmonella spp. (103, 10.3%), Rickettsia spp. (103, 10.3%), influenza virus (68, 6.8%), Leptospira spp. (44, 4.4%), chikungunya virus (37, 3.7%), and others.

|
Pathogen (Cellular & Coinfection) |
Baseline | Day 14-28 | Month 3 | |||||
| Buffy coat | Plasma | Urine | NS swab | Plasma | Urine | Plasma | Urine | |
| Acinetobacter baumanii | 7 | 7 | N/A | 1 | 6 | N/A | 5 | 1 |
| Amoeba | 12 | 10 | 1 | N/A | 11 | N/A | 10 | N/A |
|
Ascaris lumbricoides & Trichiuris trichiura |
2 | 2 | 2 | N/A | 1 | N/A | 1 | N/A |
|
Bordetella pertusis & Streptococcus pneumoniae |
1 | 1 | N/A | 1 | 1 | N/A | 1 | N/A |
| Escherichia coli | 14 | 19 | 7 | 1 | 15 | 1 | 16 | 1 |
| Klebsiella pneumoniae | 13 | 12 | 1 | 2 | 10 | N/A | 9 | N/A |
| Leptospira spp. | 35 | 41 | 6 | 1 | 35 | N/A | 35 | 1 |
|
Moraxella catharrhalis & Influenza B virus |
1 | 1 | N/A | N/A | 1 | N/A | N/A | N/A |
| Mycobacterium leprae | 2 | 2 | N/A | N/A | 2 | N/A | 1 | N/A |
| Mycobacterium tuberculosis | 18 | 19 | 2 | N/A | 11 | N/A | 11 | N/A |
| Mycoplasma pneumoniae | 1 | 1 | N/A | N/A | 1 | N/A | 1 | N/A |
| Plasmodium spp. | 2 | 2 | N/A | N/A | 1 | N/A | 1 | N/A |
| Pseudomonas aeruginosa | 7 | 8 | 1 | NA | 4 | NA | 5 | NA |
| Rickettsia felis | 1 | 1 | N/A | N/A | 1 | N/A | 1 | N/A |
| Rickettsia typhi | 87 | 96 | 5 | 1 | 76 | N/A | 71 | N/A |
| Salmonella spp. | 54 | 91 | 9 | 2 | 78 | 2 | 67 | N/A |
| Streptococcus pneumoniae | 16 | 18 | 4 | N/A | 16 | N/A | 13 | N/A |
| Toxoplasma gondii | 1 | 1 | N/A | N/A | 1 | N/A | 1 | N/A |
| Other Bacteria | 7 | 9 | 1 | N/A | 7 | N/A | 6 | N/A |
| Pathogen (Viral) | Baseline | Day 14-28 | Month 3 | |||||
| Buffy coat | Plasma | Urine | NS swab | Plasma | Urine | Plasma | Urine | |
| Adenovirus | 1 | 1 | N/A | 1 | 1 | N/A | 1 | N/A |
| Chikungunya virus | 31 | 37 | 4 | 1 | 39 | N/A | 35 | N/A |
| Coronavirus OC43 | 1 | 1 | N/A | 1 | 1 | N/A | 1 | N/A |
| Dengue virus | 375 | 415 | 19 | 11 | 318 | N/A | 294 | N/A |
| Enterovirus | 1 | 1 | N/A | 1 | 1 | N/A | 1 | N/A |
| Hepatitis A Virus | 3 | 4 | N/A | N/A | 4 | N/A | 4 | N/A |
| Human Herpes Virus 6 | 5 | 8 | 1 | 1 | 5 | N/A | 6 | N/A |
| Human Metapneumovirus | N/A | 1 | N/A | 1 | 1 | N/A | 1 | N/A |
| Influenza A virus | 32 | 36 | N/A | 5 | 32 | N/A | 36 | N/A |
| Influenza B virus | 18 | 19 | 1 | 3 | 18 | N/A | 17 | N/A |
| Measles virus | 8 | 10 | N/A | 1 | 10 | N/A | 9 | N/A |
| Respiratory Syncytial Virus | 8 | 10 | N/A | 3 | 10 | N/A | 9 | N/A |
| Seoul virus | 2 | 2 | N/A | N/A | 2 | N/A | 2 | N/A |
| Unidentified | 376 | 442 | 38 | 13 | 331 | 13 | 270 | 6 |
| Other Categories | Baseline | Day 14-28 | Month 3 | |||||
| Buffy coat | Plas ma | Urine | NS swab | Plas ma | Urine | Plas ma | Urine | |
| Adult | 761 | 831 | 73 | 22 | 643 | 14 | 582 | 7 |
| Paediatric | 368 | 494 | 35 | 30 | 397 | 5 | 356 | 3 |
| Comorbidities* | 327 | 383 | 40 | 22 | 302 | 12 | 261 | 7 |
| Fatal cases | 73 | 81 | 10 | 3 | 28 | 1 | 6 | 0 |