Wednesday, May 23, 2007

Miscellaneous - Pictures

Image 1: Borrelia burgdorferi under light microscopy (1000x with oil)

Miscellaneous - Pictures

Image 2: Single Borrelia burgdorferi under transmission electron microscopy

Miscellaneous - Pictures

Image 3: Life cycle of lyme disease ticks

Miscellaneous - Pictures

Image 4: Pictures of ‘bulls-eye’ rashes significant of Lyme disease

Miscellaneous - Pictures

Image 5: Microscopic view of Rickettsia typhi, causative agent of murine typhus

Miscellaneous - Pictures

Image 6: Transmission vector of murine typhus, flea

Miscellaneous - Pictures

Image 7: Transmission cycle of Rickettsia typhi from vectors to human

Tuesday, May 22, 2007

Miscellaneous - Picture links

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Sunday, May 20, 2007

Final diagnoses

1) Murine typhus

Causative microorganism: Rickettsia typhi

Transmission vehicles: Lice or fleas

How we deduced: It is highly probable as the patient is living in unhygienic conditions and there is also an infestation of fleas. Moreover, the patient feeds stray dogs and cats which could have fleas carrying Rickettsia typhi.

Sample(s) taken: Blood

Collection via: Venipuncture (venous blood)

Preliminary testing: Full blood count, Blood culture

Confirmatory testing: Direct Fluorescent Antibody (DFA), Skin rash biopsy

2) Lyme disease

Causative microorganism: Borrelia burgdorferi

Transmission vehicles: Rodent ticks

How we deduced: The infestation of rats in his premise makes the probability of contracting lyme disease a reality for the patient.

Sample(s) taken: Blood

Collection via: Venipuncture (venous blood)

Preliminary testing: Physical investigations for visible rash, ELISA to detect lyme antibodies

Confirmatory testing: Lyme disease testing (Anti-borrelia burgdorferi IgM/IgG), Western Blot, Polymerase Chain Reaction (PCR)