- Blood parasites.

- Parasites transmitted through blood transfusion.

= parasites which have apart of its life cycle in the blood

1- Leishmania donovani .

which causes visceral Leishmaniasis either old world or new world

2- Plasmodia species .

3- Babesia species .

4-Toxoplasma gondii .

5-Trypanosoma species :-

a-Trypanosoma brucei complex

-Trypanosoma brucei gambiense .

-Trypanosoma brucei rhodesiense.

b-Trypanosoma cruzi.

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- Transplacental (congenital ) transmitted Parasites.

=1- All transmitted by blood except Babesia species.

2- Ancylostoma duodenale ( rare).
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- Parasites Detected in peripheral blood.

1. Plasmodia species inside RBCs.
2. Babesia species inside RBCs.
3. Leishmania donovani inside WBCs ( macrophage).
4. Toxoplasma gondii inside WBCs ( macrophage).
5. Trypanosoma species Intercellular (between blood cells) .
6. Microfilariae except onchocerca volvulus Intercellular (between blood cells) .

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- Parasites which cause anaemia :-

1. Leishmania donovani ...Aplastic anaemia.
2. Plasmodia species....Haemolytic anaemia.
3. Shistosoma species..iron deficiency anaemia.
4. Hookworms............iron deficiency anaemia.
5. Diphyllobothrium latum...Perniciuos anaemia.
6. Trichuris trichiura......... Perniciuos anaemia.