presentation on arthropods Transmission of disease by arthropod metamorphosis of arthropods

1. ‫الرحيم‬ ‫الرحمن‬ ‫هللا‬ ‫بسم‬
PRESENTATION ON
INTODUCTION OF ARTHROPOD
Made by /khaled Moamed Ahmed
Under supervision of / prof.Ahmed Kamal Dyab

2. NAMING
Arthus is a greek word means joint
Podes = foot
This indicates that the members of this phylum
have joint limbs

3. GENERAL CHARACTERS OF ARTHROPODA
*segmented , bilaterally symmetrical
* Have exoskeleton for protection
* The body is divided externally , but its cavity is
continuous
*body cavity (haemocele) is filled with
blood(haemolymph)
* Internal organs bath in haemolymph

4. GENERAL CHARACTERS OF ARTHROPODA
* Circulatory system consists of
_pulsing dorsal tube(heart)
_vessles as aorta
* Digestive tract is divided into 3 part
_fore gut :mouth , pharynx , oesophagus ,
proventriculus, salivary glands
_mid gut : stomach
_hind gut :ileum , colon , rectum , open by anus out
side

5. GENERAL CHARACTERS OF ARTHROPODA
* Respiratory system is formed of
_2 main branching tracheal tubes reach all parts of
body
_opens to outside by respiratory spiracles
* Male external genitalia (aedegus , paired claspers)
* Female external genitalia(spermatheca)
Note that genital organs con be of taxonomic value

7. VETERINARY IMPORTANCE OF
ARTHROPODA
1- they may cause diseases
2- they may transmit diseases
3- they may cause announcement
4- for medical uses

8. MODE OF TRANSMISSION OF DISEASES BY
ARTHROPODA
1- Mechanical
2-Biological

9. MODE OF TRANSMISSION OF DISEASES BY
ARTHROPODA
1- Mecanical :arthropod is a passive
carrier
*contaminative----non biting insects
* Passive carrier---- by their wet
proboscis

10. MODE OF TRANSMISSION OF DISEASES BY
ARTHROPODA
2- Biological : in this mode arthropod is obligate
vector forming a part of life cycle of parasite or
pathogen
*this may be
a) propagative
b) Cyclopropagative
c) Cyclodevelopmental
d) transovarian

11. MODE OF TRANSMISSION OF DISEASES BY
ARTHROPODA
a) propagative
- Multiplication without development
- Occur in bacteria , rickettsia , viurus
- e.g yerisenia pestis
b) Cyclopropagative
-multiplication and development
- In all protozoa

12. MODE OF TRANSMISSION OF DISEASES BY
ARTHROPODA
c) Cyclodevelopmental
- Development only without multiplication
- In all helminthes
d) Transovarian
- Through the egg of arthropod
- e.g babesia , Dipylidium caninum

13. METAMORPHOSIS OF ARTHROPODS
1- Complete metamorphosis
2- Incomplete metamorphosis

14. METAMORPHOSIS OF ARTHROPODS
Incomplete
metamorphosis
Complete
metamorphosis
hemimetabolousholometaboloustype
Similar to the adult but
Smaller in size
Paler in color
Sexually immature
Completely different in
morphology
Intermediate stages
(larva , pupa , adult)
SimilardifferentHabitat and feeding habits
of Intermediate stages
Bugs , ticks , liceMosquitoes , flies , flease.g

15. METAMORPHOSIS OF ARTHROPODS
Incomplete metamorphosisComplete metamorphosis

16. REFERANCES
 http://www.slideshare.net/mnajeeb80/entomology-
by-dr-najeeb?related=7
 http://www.slideshare.net/qasem7610/entomology?
related=9
 http://www.slideshare.net/jamesmacroony/medical-
entomology-41295544?related=1