Parasitology (parasitic arhropods)

1. Parasitology practical 2
(Parasitic arthropods)
By : Osama Al-Zahrani
@OSAMA_Z96

2. Adult Culex head
Female
1- Pilose
2- Short
Male
1- Plumose
2- Long but curved dorsally
Antennae
Maxillary palps

3. Female
1- Pilose
2- As long as proboscis
Male
1- Plumose
2- Long and clubbed
Adult Anopheles head
Antennae
Maxillary palps

4. Larva of Culex
Makes angle with water surface
Siphon : narrow & long

5. Larva of Anopheles
Parallel to water surface
Siphon : absent

6. Phlebotomus (Sandy Flies)
Sand flies are small (1.5-5μm) , very hairy with long legs, sandy in colour,
with lanceolate wings which are carried upward and backward at rest

7. Adult Musca domestica
1- Gray fly with small size 5-10 mm in size.
2- composed of three parts ( head , thorax and abdomen) .

8. Antenna of Musca
1- Consists of 3 segments, the 3rd (terminal) is
bigger carrying dorsally a stiff hair called arista.
2- The arista carries simple hairs on both ventral
and dorsal sides

9. Posterior Respiratory spiracle of Musca
1- D- shaped 2 posterior respiratory spiracles
2- Each shows three S shape respiratory slites

10. Flea
1- Fleas are laterally compressed , wingless and small sized (2-4mm) with powerful legs.
2- The entire body is generally covered with stiff hairs which are directed backwards.
3- The body divided into head, thorax and abdomen, three pairs of gimping legs.

11. Lice
1- Flattened dorsoventrally , wingless
and gray in color.
2- Body is divided into a head, thorax,
and abdomen, mouth parts adapted for
piercing and sucking Antennae are short
and consist of five segments.
3- Thoracic segments fused having three
pairs of legs that adapted for clinging to
hairs or clothes with 8 abdominal
segments.

12. Lice egg
1- Oval
2- About 1mm in length
3- Operculum convex with crown- like projection and cemented
to fibers of clothing or hairs

13. Male :
1- It measures 0.2 mm.
2- Oval or rounded shaped
3- Formed of one piece ( fused cephalothorax and abdomen) Capitulum
projecting anteriorly
4- Have four pairs of legs the 3rd pair ends with long bristles while the
4th pair end with suckers.
Female :
Similar to the male but it differs in size in size it measures 0.4mm and
The posterior 2 pairs of legs ends with long bristles.
Sarcoptes scabiei

14. Glossina (Tse tse Flies)
Vectors of trypanosoma brucei gambiense & rhodiense.
Antenna of Glossina
Arista has branching hairs on the dorsal side only