Viruses study sheet
| Virus | Classification | Lab and identification clues | High-yield clue | Associations |
|---|---|---|---|---|
| Adenovirus | Nonenveloped virus; Double-stranded DNA; Icosahedral capsid concept | PCR vocabulary; Adenoviral inclusion concept; Respiratory viral panel term | Nonenveloped dsDNA + respiratory/conjunctivitis/GI vocabulary. | Pharyngoconjunctival fever vocabulary; Pneumonia outbreak framing; Gastroenteritis comparison |
| BK virus | DNA virus; Double-stranded circular DNA; Non-enveloped; Family Polyomaviridae (Human polyomavirus 1) | Urinary 'decoy cell' cytology concept; Blood and urine PCR viral-load vocabulary; Renal tubular epithelial tropism concept; Latency in uroepithelium vocabulary | BK virus reactivation causing nephropathy in kidney transplant and hemorrhagic cystitis after stem-cell transplant is the key clue. | Polyomavirus-associated nephropathy in kidney transplant; Hemorrhagic cystitis after hematopoietic transplant; Reactivation driven by immunosuppression; Ureteral stenosis study association |
| Chikungunya virus | Togaviridae; Genus Alphavirus; Positive-sense ssRNA; Enveloped; Arbovirus | RNA detection and serology vocabulary; Polyarthralgia study association; Dengue co-circulation distinction concept | Aedes-transmitted Togaviridae alphavirus whose hallmark is severe, often prolonged polyarthralgia (bent-over posture). | Aedes aegypti and Aedes albopictus vector; Severe symmetric polyarthralgia and arthritis vocabulary; Fever with rash presentation vocabulary; Tropical outbreak epidemiology |
| Coxsackievirus | RNA virus; Positive-sense single-stranded RNA; Non-enveloped icosahedral; Family Picornaviridae, genus Enterovirus | Enterovirus classification concept; Group A vs group B distinction; Stool/throat/CSF detection vocabulary; Vesicular lesion cytology concept | Group A causes hand-foot-and-mouth disease and herpangina, while group B is linked to myocarditis and pleurodynia. | Hand-foot-and-mouth disease and herpangina (group A); Myocarditis and pericarditis (group B); Pleurodynia (Bornholm disease) vocabulary; Fecal-oral and respiratory-droplet spread |
| Crimean-Congo hemorrhagic fever virus | Nairoviridae; Order Bunyavirales; Genus Orthonairovirus; Negative-sense ssRNA; Tri-segmented, enveloped | Segmented negative-sense bunyavirus genome vocabulary; Viral hemorrhagic fever framing; Tick-vector epidemiology concept | Bunyavirales nairovirus transmitted mainly by Hyalomma ticks and by contact with infected livestock blood. | Hyalomma tick vector; Contact with viremic livestock blood/tissue; Viral hemorrhagic fever presentation vocabulary; Africa, Eurasia, and Middle East epidemiology |
| Cytomegalovirus | Enveloped virus; Double-stranded DNA; Herpesvirus | PCR viral-load vocabulary; Serology concept; Owl-eye inclusion teaching image | Herpesvirus + owl-eye inclusion vocabulary + congenital/opportunistic clues. | Congenital infection vocabulary; Mononucleosis-like illness contrast; Opportunistic retinitis/colitis terms |
Assembled from the free PetriKey reference. Every row is published in full on its own reference page, with that page's own sources. Educational study reference only - not medical advice, and not for diagnosis, treatment, dosing, specimen handling, or any clinical decision-making.