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Infectious Diseases
Practical 1-3
Primary Pulmonary Tuberculosis
Ghon Complex:
The gray-white parenchymal
focus under the pleura in the
lower part of upper lobe
Hilar lymph nodes with
caseation are seen on the left
Non-Caseous Granulomas
Caseous Granulomas
TB Bacilli - Red rods with Ziehl-Neelsen Stain
Secondary Pulmonary Tuberculosis
Upper parts of lungs
shows gray-white areas
of caseation and multiple
areas of softening and
cavitations
Tuberculous Lymphadenitis
Tuberculoid Leprosy
Granuloma around a
peripheral nerve in the
dermis
Lapromatous Leprosy
Skin biopsy shows
macrophages filled
with short, thin, red
rods of acid-fast bacilli
after modified Z-N stain
Lapromatous Leprosy-Aseptic Necrosis
Primary Syphilis - Chancre
2/22/2019
Tertiary Syphilis - Gumma
2/22/2019
Tertiary Syphilis
Odd clefting divides the
liver into large nodules
with smooth surfaces is
called hepar lobatum
Candida infection
Candida albicans
GMS positivePAS positiveH&E
Aspergillosis Lung – Septate Branched Hyphae
17
Mucormycosis Non-Septate hyphae
Eumycetoma Actinomycosis
2/22/2019
Fungal stain Gram Positive
Schistosoma haematobium
Urinary bladder mucosa
shows numerous
calcified eggs and
extensive scarring
Schistosoma mansoni
Colonic mucosa
showing Schistosoma
mansoni infection
Hydatid Cyst
Hydatid Cyst wall and Scolices
Amebic Typhilitis
Flask shaped ulcer in the
cecum due to Entameba
histolytica infection
Under high power, some
of the Amebic Trophozoite
form shows ingested red
blood cells
Amyloidosis
Amyloid deposits-Medullary
carcinoma of thyroid
Amyloid deposits stained
with Congo red as a pinkish
material
Amyloid stained with Congo
red under polarized light,
gives a characteristic "apple
green" birefringence
References
Robbins Basic Pathology 10th edition
www.webpath.com
Image Gallery - University of Washington
depts.washington.edu/handbook/.../index.html
USMLE Pathology Slides - Flask shaped ulcer in cecum due ...
usmlepathslides.tumblr.com/

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