Microgamete

Male sex cell 

Macrogamete

Female sex cell 

Bradyzoite

Another name for the slow growing trophozoite of Toxoplasma gondiii which are found within tissue cysts.

Oocyst

The encysted form of the zygote, formed during sexual reproduction, and often infective for humans; the infective form of Toxoplasma gondii shed in cat feces

Ookinete

A developed form of the malarial parasite within the mosquito 

Merozoite

Cells produced within shizonts during shizogony or asexual reproduction; malarial form produced within liver cells during the asexual pre-erythrocytic cycle and in the red blood cells (erythrocytic cycle)

Sarcocyst

The cyst form of Sarcocystis species, found in muscle

Sporocyst

A sac formed during the reproductive cycle within the oocyst of certain coccidia, and which gives rise to a characteristic number of sporozoites,; the developmental structures contained within the oocyst of Toxoplasma gondii

Sporozoite

 Formed within oocysts of coccidian parasites; spindle-shaped infective stage of the malarial parasite, found in the mosquito

Tachyzoite

Actively proliferating trophozoite 

Schizont

Developmental form produced during schizogony, or asexual reproduction 

Sporoblast

The immature precursor to the sporocyst found in protozoan oocysts 

Zygote

A fertilized stage formed by the union of male and female sex cells 

Schizogony

A stage in the asexual cycle of the malarial parasite that takes place within the red blood cell; asexual reproduction among the Sporozoa 

 Sporogony

Sexual reproduction among the Sporozoa; a stage in the sexual cycle of the malarial parasite that takees place in the mosquito 

Benign tertian malaria

Plasmodium vivax malaria (48-hour periodicity)

Blackwater fever

A complication of P. falciparum malaria characterized by the passage of reddish to black colored urine resulting from massive intravascular hemolysis.

Quartan malaria

Malaria characterized by a 72-hour periodicity of fever (P. malariae)

 Malignant tertian malaria

Plasmodium falciparum malaria (48-hour periodicity)

Texas cattle fever

An infection in cattle caused by species of Babesia

Pneumocystosis

An acute interstitial plasma cell pneumonia caused by Pneumoscystis carinii

Toxoplasmosis

A generally benign disease caused by infection with the protozoan Toxoplasma gondii.  Immunocompromised patients and the developing fetus are at greatest risk of clinical disease

Erythrocytic cycle

The portion of the asexual malarial reprodcution cycle that takes place within red blood cells. 

Exoerythrocytic cycle

The portion of the asexual malarial reproduction cycle that takes place within red blood cells 

Gametocytogenesis

The formation of male and female sex cells (gametocytes) 

 Encephalomyelitis

An acute inflammation of the brain and spinal cord. 

Hemoglobinuria

The presence of hemoglobin in urine. 

Ischemia

Insufficient blood supply 

Rigor

Shaking chills. 

Recrudescence 

A recurrence of malarial symptoms in patients with previously low grade, asymptomatic parasitemia

Malignant jaundice

An infection in dogs caused by species of Babesia

Malarial paroxysm

A periodic episode characterized by fever, chills, headache, sweats and fatigue 

Malarial pigment

 Brownish colored pigment found in red cells infected with Plasmodium spp. made up of the waste products of hemoglobin metabolism.

 Maurer's dots/clefts

 Irregular, dark red, rod, or wedge shaped markings in red blood cells infected with P. falciparum

Schuffner's dots

Tiny, red staining granules (Giemsa stained) found in the cytoplasm of red blood cells infected with P. vivax or P. ovale

Ziemann's dots

Dust-fine, pink staining dots (Giemsa stained) found in the cytoplasm of red blood cells infected with P. malariae