🔥Infectious Rashes🔥
1️⃣ First disease: Measles
Pathogen: Paramyxovirus
Prodrome: 4c (cough, coryza, conjunctivitis, Koplik spots)
Fever AND rash “Head then trunk”
Dx: Clinical
Tx: supportive (+ Vit A)
PPx: MMRV
Complication: Subacute sclerosing panencephalitis
2️⃣ Second disease: Scarlet fever
Pathogen: S. Pyogenes
Fever, Pharyngitis, Tonsillitis, Strawberry tongue, Tender Anterior Cervical LN, Sandpaper rash
Dx: Rapid streptococcal antigen test, Throat Cx
Tx: Penicillin
3️⃣ Third disease: German measles (Rubella)
Pathogen: Rubella
Prodrome: Generalised tender LN
Fever AND rash “Head then trunk”
Dx: Clinical
Tx: Supportive
PPx: MMRV
4️⃣ Fourth disease: SSSS
Pathogen: S. aureus “Exfoliative toxin”
Prodrome: Fever, Skin tenderness
THEN Erythematous macules & Perioral and Periocular crusting
THEN Widespread desquamation with moist red skin & Crusting
Spares Mucosal membranes
Dx: Clinical
Tx: Supportive & Anti-Staph
Avoid NSAIDs & Steroids
5️⃣ Fifth disease: Parvovirus B19 “Erythema Infectiosum”
Pathogen: Parvovirus B19
Slapped cheek
Fever AND rash on face
Dx: Clinical
Tx: Supportive
Complications: Aplastic crisis
Hydrops fetalis “isolated mom”
6️⃣ Sixth disease: Roseola infantum
Pathogen: HHV 6
Prodrome: Very High-Spiking Fever (>104 F)
Fever THEN Rash “Trunk then head & extremities”
Dx: Clinical
Tx: Supportive
Complications: Febrile seizure
✅ Varicella Zoster Virus
Pathogen: Varicella
Baby 👉🏻 Chickenpox
Adult 👉🏻 Shingles
Rash NO Fever
Diffuse, Vesicles on erythematous base “at different stages of healing”
Dx: Clinical
Tx: Supportive
PPx: MMRV
✅ Hand Foot Mouth Disease
Pathogen: Coxachie A Virus
Looks like Varicella But in Hand Foot Mouth
Dx: Clinical
Tx: Supportive
No vaccine for it
✅ Mumps
Pathogen: Mumps
Pubertal males with Parotid swelling & Orchitis
Dx: Clinical
Tx: Supportive
PPx: MMRV
Complication: Infertility
