parasitology entamalogy for ospe
TRANSCRIPT
PARASITOLOGY entamology
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JMJO Great St. Joseph of Cupertino who while on earth did obtain from God the grace to be asked at your examination only the questions you knew, obtain for me a like favors in the examinations for which I am now preparing. In return I promise to make you known and cause you to be invoked.
Through Christ our Lord.St. Joseph of Cupertino, Pray for us.
Amen.
Flies
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House Fly Musca domestica
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House Fly Musca domestica
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• Vein 4 bending up sharply to join the costa close to vein 3
this is an important character which can help distinguish Musca species from other rather similar species
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House Fly- Musca domestica
House Fly Musca domestica wing
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House Fly Musca domestica wing
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• At the posterior end of the body of the larva, there is a pair of conspicuous spiracles shaped like letter D
each spherical, has a thick outer wall “ peritreme” it encloses three vary sinous spiracular slits
characteristic pattern varies depending on the species
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House Fly- Musca domestica larva
House fly – Musca domestica larva
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House fly – Musca domestica larva
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• Creamy white in colour
distinctly concave dorsally giving them a banana shaped appeaarance
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House Fly- Musca domestica Eggs
House fly – Musca domestica eggs
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Sand fly – Genus PHLEBOTOMUS
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Small body with hairy appearanceHead bent at an acute angleHas large black eyesWings held erect when the fly is at restLong slit-like legs
Sand fly – Genus PHLEBOTOMUS
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Sand fly – Genus PHLEBOTOMUS
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Sand fly – Genus PHLEBOTOMUS
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Sand fly – Genus PHLEBOTOMUS
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Sand fly – Genus PHLEBOTOMUS
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Tsetse fly – Glossina Spp
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• “Hatchet cell” between 4th and 5th vein is the characteristic feature
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Tsetse Fly- Glossina Spp
Common flesh fly – Sarcophaga Spp- larva
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Common flesh fly – Sarcophaga Spp- larva
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Chrysomyia Spp. Adult and larvae
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Chrysomyia Spp. Posterior spiracles
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Chrysomyia Spp. Posterior spiracles
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Mites
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Sarcoptes scabiei – in skin infection
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• Larger than male
four pairs od short stumpy legs
Anterior 2 pairs end in suckers
posterior 2 pairs end in bristles
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Sarcoptus scabiei- female
• Smaller than female
four pairs of short stumpy legs
First, second and 4th pairs end in suckers
3rd pair ends in bristles
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Sarcoptus scabiei- Male
Bugs
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Adult Reduvid/ Triatomine/ Cone-Nosed BugLong snout like headProminent dark coloured eyesPair of laterally placed long thin antennaeFlattened bodyBark brown with red and yellow markings on
thorax, wings and sides of abdomen2 pairs of wings (fore wings and hind wings)3 pairs of thin elongated legs
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Adult Reduvid/ Triatomine/ Cone-Nosed Bug
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Adult Reduvid/ Triatomine/ Cone-Nosed Bug
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Bed bug (Cimex lectularis)Oval in shapeFlattened dorsoventrallyPale yellow/brown in colourHead has a pair of antenna and a folded,
slender proboscisBiting nuisanceBoth sexes feed on blood
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Bed bug (Cimex lectularis)Head
◦ Short and broad with prominent eyes◦ Four segmented laterally placed antennae◦ Proboscis held closely appressed along the ventral surface of the
headBody
◦ 4-5 mm long oval wingless insect◦ Flattened dorsoventrally
Wings◦ Two rudimentary non functional wings termed “Hemelytra”
Legs ◦ Three pairs of slender, well developed legs
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Bed bug (Cimex lectularis)Head
◦ Short and broad with prominent eyes◦ Four segmented laterally placed antennae◦ Proboscis held closely appressed along the ventral surface of the
headBody
◦ 4-5 mm long oval wingless insect◦ Flattened dorsoventrally
Wings◦ Two rudimentary non functional wings termed “Hemelytra”
Legs ◦ Three pairs of slender, well developed legs
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Lice
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Lice
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Lice
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Lice
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Lice
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• Bifurcated posterior end
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Pediculus humanus - female
• Round posterior end
medially placed male genital organ (Penis)
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Pediculus humanus - male
Pediculus humanus - female
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Pediculus humanus male
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Pediculus humanus humanus (body louse)Pediculus humanus capitis (Head louse)
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WinglessFlattened dorsoventrallySimple lateral eyesChitinous thorax3 pairs of legs ending with an apical claw and
a spine2-4 mm in length
Pediculus humanus humanus (body louse)Pediculus humanus capitis (Head louse)
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Pediculus humanus humanus (body louse)Pediculus humanus capitis (Head louse)
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Pthirus pubis (cran louse)General features
◦ 0.8-1.2 mm in length◦ Crab like appearance◦ Oblong turtle shaped body
Head◦ Rectangular shaped◦ Pair of 5 jointed antennae◦ Pair of simple lateral eyes
Legs◦ 3 pairs of legs◦ 1st pair not well developed◦ Last 2 – provided with well developed heavy claws
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Pthirus pubis (cran louse)
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Lice nit
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Fleas
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Order Siphonaptera
Family pulicidae
Combless fleas
G Xenopsylla Pulex
Combed fleas
G Nosopsyllus
Ctenocephalides
Leptolsyllus
G. Tunga
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Fleas
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FleasBody is laterally compressedLight to dark brown in colourWingless insectsThree pairs of powerful and well developed
legsHind pair of legs are specialized for jumpingLegs and body are covered with bristles and
small spines
Pulex irritans (Human flea)Combless
fleasNo meral rod
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Pulex irritans (Human flea)
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Ctenocephalides
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Rat Flea – Xenopsylla cheopis
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Rat Flea – Xenopsylla cheopis
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Absent both genal and pronotal combsPrecence of meral rod‘C’ shaped spermatheca (female)Round posterior end (female)
Ticks
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Hard tick- (Ixoda dommini) male
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Hard tick- (Ixoda dommini) male
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Hard tick- (Ixoda dommini) female
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Hard tick- (Ixoda dommini)
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Hard tick- (Ixoda dommini)
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Soft tick- (Argus persicus)
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Soft tick- (Argus persicus)
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Body – oval flattened dorsoventrallyCapitulum (mouthparts) – situated ventrally
thus not visible No scutum4 pairs of legs
Soft tick- (Argus persicus)
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Soft tick- (Aroasidae)
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