Parasitology-images for neet pgs and ugs

marthandkumar 67 views 63 slides Jul 31, 2024
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About This Presentation

Parasitology for pgs


Slide Content

Entamoeba histolytica – erythrophagous trophozoites

Quadrinucleate cyst of Entamoeba histolytica

Entamoeba histolytica

Trophozoites of naegleria fowleri – H&E stain

Trophozoites of Naegleria fowleri – immunofluorescence stain

Cryptosporidium 6 µm Cyclospora 10 µm Isospora 25-40 µm

Thick smear positive for plasmodium

Multiple ring and accole forms – Plasmodium falciparum

Crescent shaped gametocytes and divided nuclei in ring form – Plasmodium falciparum

Amoeboid and ring forms – Plasmodium vivax

Late trophozoite (amoeboid form) – Plasmodium vivax

Schizont – Plasmodium vivax

Merozoite – Plasmodium vivax

Basket like trophozoite of Plasmodium malariae

Band form of Plasmodium vivax

Ring form and gametocyte of Plasmodium falciparum

Maltese cross – Babesia microti

LD body (perpendicular kinetoplast of amastigote – dot & dash) Leishmania donovani

Amastigote of T. cruzi in smooth muscle of heart

C shaped trypomastigote - T cruzi Elongated trypomastigote – T bruzi

Triatome bug – vector for T cruzi

Tsetse fly – vector for T bruzi

Trichomonas vaginalis – trichrome stain

Tissue cyst – Toxoplasma gondi

Cyclops

Flea

mite

Tick

Sand fly

Chrysops

Operculated brown egg with knob at one end – Diphyllobothrium latum

Egg of Diphyllobotrium , Fasciola & fasciolopsis >100 µm, operculated indistinguisable

Sparganum (Genus spirometra )

Echinococcus ( hydatid cyst)

Coenuri of  T. multiceps  are usually found in the eyes and brain; those of  T. serialis  are usually found in subcutaneous tissue

Taenia ( Cysticerci )

Coenurus (T. multiceps or T serialis )

green arrow – ectocyst - the cyst wall is composed of an acellular laminated external layer yellow arrow – endocyst - thin, germinal (nucleated) inner layer black arrow - brood capsule blue arrows – protoscoleces  

daughter cyst (brood capsule) purple arrow - hooklets inside one of the protoscoleces light blue arrows - the calcareous corpuscles along the germinal layer.

Egg of Taenia -30-40 µm -Bile stained - straited Egg of H. nana -30-40 µm -Non bile stained -4 spicules Egg of cestodes : 3 pair of hooklets except D latum ( operculated )

Cercaria

Egg granuloma in liver – lateral spine – Schistosoma mansoni

Egg of Schistosoma : 100-150 µm, non operculated S. haematobium : terminal spine (Ca bladder) S. mansoni : lateral spine S. japonicum : spine inconspicuous

Eggs of Clonorchis & Opisthorchis 15-30 µm operculated with shoulders Cholangiocarcinoma

Egg of ascaris 50-60 µm Bile stained Rugosity Egg of trichuris 70-80 µm Bile stained barrel shaped bipolar plugs

Egg of ankylostoma / necator 50-60 µm Non bile stained 4 blastomeres Egg of enterobius 70 µm Non bile stained plano convex

Plano convex eggs under fluorescence microscope

Strongyloides larvae Top: Rhabditiform Middle: filariform Bottom: Filariform in trichrome stain

Wuchereria bancrofti Nuclear material do not extend to the tip

Loa loa Nuclear material extends upto tip

Loa loa

Loa loa

Manzonella Unsheathed Nuclear material upto tip

Cross section of adult Onchocerca in tissue – microfilariae seen within the adults

Cross section of adult Onchocerca in tissue – microfilariae seen within the adults

Nurse cell – encysted larva in striated muscle (Lemon sign) – Trichenella spiralis

Nurse cell – encysted larva in striated muscle (Lemon sign) – Trichenella spiralis

Cutaneous larva migrans

Eosinophilic granuloma around a helminth
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