TROPHOZOITES IN COLONIC AMEBIASIS Figure 26-11 TROPHOZOITES IN COLONIC AMEBIASIS A: At high power, a round pale parasite nucleus (contrasting with the dark nuclei of surrounding inflammatory cells), central nuclear karyosome, and abundant vacuolated cytoplasm are seen. B: The granular intracytop... More about this image found in TROPHOZOITES IN COLONIC AMEBIASIS A: At high power, a round pale parasite ...

ENTERIC CYCLOSPORIASIS Figure 26-42 ENTERIC CYCLOSPORIASIS Various C. cayetanensis parasite forms are seen at high power. Both sexual stages (arrow) and asexual stages (arrow-head shows elongated, “banana-shaped” merozoites) are visible in the enterocyte cytoplasm. More about this image found in ENTERIC CYCLOSPORIASIS Various C. cayetanensis parasite f...

E. HISTOLYTICA PARASITES Figure 26-14 E. HISTOLYTICA PARASITES E. histolytica parasites are identified in a fecal smear as trophozoites (illustrated) or cysts. (Courtesy of Dr. L. E. Botero, Pontificia Bolivariana University, Medellín, Colombia) More about this image found in E. HISTOLYTICA PARASITES E. histolytica ...

CRYPTOSPORIDIUM PARASITES Figure 26-31 CRYPTOSPORIDIUM PARASITES Giemsa stain highlights luminal parasites in infected gallbladder mucosa. More about this image found in CRYPTOSPORIDIUM PARASITES Giemsa stain highlights luminal...

CYSTOISOSPORA PARASITES Figure 26-36 CYSTOISOSPORA PARASITES Intracytoplasmic Cystoisospora organisms are located in enterocyte paracytophorous vacuoles (arrows), and highlighted with a Giemsa stain (A,B). More about this image found in CYSTOISOSPORA PARASITES Intracytoplasmic Cystoiso...

SMALL INTESTINAL CYCLOSPORA CAYETANENSIS PARASITES Figure 26-43 SMALL INTESTINAL CYCLOSPORA CAYETANENSIS PARASITES Numerous small intestinal Cyclospora cayetanensis parasites are located in intraepithelial paracytophorous vacuoles (at center, A), focally visible as a “halo” surrounding the organism (arrowhead) (B). More about this image found in SMALL INTESTINAL CYCLOSPORA CAYETANENSIS PARASITES Numero...

BABESIA SPP Figure 27-10 BABESIA SPP Detection in blood smears of both intraerythrocytic (A,B) and extracellular (C) parasites. (Courtesy of the CDC Division of Parasitic Diseases [DPDx]) More about this image found in BABESIA SPP Detection in blood smears of both intraerythr...

TOXOPLASMA MYOCARDITIS Figure 25-5 TOXOPLASMA MYOCARDITIS There is minimal mononuclear inflammation (A) and numerous parasitic organisms (B). More about this image found in TOXOPLASMA MYOCARDITIS There is minimal mononuclear infla...

ACANTHAMOEBA INFECTION Figure 25-17 ACANTHAMOEBA INFECTION Infection in the skin (A) and lung (B,C) are associated with the characteristic parasites (D–F). More about this image found in ACANTHAMOEBA INFECTION Infection in the skin (A) and lung...

TRYPANOSOMA CRUZI TRYPOMASTIGOTES Figure 29-4 TRYPANOSOMA CRUZI TRYPOMASTIGOTES Annotated morphology of T. cruzi on a blood smear. (Courtesy of the CDC Division of Parasitic Diseases [DPDx]) More about this image found in TRYPANOSOMA CRUZI TRYPOMASTIGOTES Annotated morphology of...

CYSTOISOSPORA SPP ORGANISMS Figure 26-37 CYSTOISOSPORA SPP ORGANISMS Involvement of the stomach by Cystoisospora parasites (arrow), as part of disseminated disease in patients with acquired immunodeficiency syndrome (AIDS). More about this image found in CYSTOISOSPORA SPP ORGANISMS Involvement of the stomach by...

CUTANEOUS LEISHMANIASIS Figure 28-6 CUTANEOUS LEISHMANIASIS Cutaneous epithelioid cell granulomas have giant cells and a rim of lymphocytes. Giant cell intracytoplasmic parasites are abundant. (Courtesy of the Armed Forces Institute of Pathology) More about this image found in CUTANEOUS LEISHMANIASIS Cutaneous epithelioid cell granulomas have giant c...

TRICHOMONAS Figure 30-4 TRICHOMONAS Cervical cytology smears show clusters of neutrophils, reactive squamous epithelial changes (with vague perinuclear halos), and interspersed T. vaginalis organisms (arrows) (A,B). Note the nondescript appearance of the parasites against the granular smear background (C). More about this image found in TRICHOMONAS Cervical cytology smears show clusters of neu...

P. FALCIPARUM INFECTION Figure 27-5 P. FALCIPARUM INFECTION Peripheral blood smear shows a high level of parasitemia, numerous erythrocyte ring forms, and more than one parasite per red blood cell. (Courtesy of Prof. L. Dreyer, University of Pretoria, Pretoria, South Africa) More about this image found in P. FALCIPARUM INFECTION Peripheral blood smear shows a hi...

E. HISTOLYTICA TROPHOZOITES Figure 26-12 E. HISTOLYTICA TROPHOZOITES A: Periodic acid–Schiff (PAS) staining aids in identification of E. histolytica trophozoites by highlighting their cytoplasmic complex carbohydrate content. B: Masson trichrome stain illustrates abundant parasitic organisms in surrounding necrotic debris/tissue, some with abundant intracytoplasmic granular debris. More about this image found in E. HISTOLYTICA TROPHOZOITES A: Periodic acid–Schiff (PAS)...