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PARASITICINFECTIONS
Scabies Pediculosis Leishmaniasis Larvamigrans Trichomoniasis
Myiasis
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SCABIES
Sarcoptes scabiei var.hominis
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Lifecycle
Lifespan46weeks
40 50eggsinlife
Adultfemaleeggs Sixleggedlarva
34days
Copulation adult nymph
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Incubation
2 3months firstexposure
1day1month reexposure
Pathology
Delayedhypersensitivity(miteantigen)
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Modeofinfestation
Closeintimatecontact
(Skintoskin)
Pregnantfemale nymph
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ClinicalfeaturesGeneralizedpruritus (night)
Skinlesions burrow
Hands
Abdomen,
Malegenitalia,
Femalebreast
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Burrow - characteristic lesion
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Papules,Vesiculo-pustulesCrustExcoriationsSecondary pyoderma
Family history
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ComplicationsSecondaryinfectionGlomerulonephritis
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Nodular scabies
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Diagnosis Clinical features
Demonstration of MiteOva,Nymph Faecal pellets
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TREATMENT
1. Permethrin 5%lotion/cream once2. Gammabenzenehexachloride
1%3. Benzylbenzoatelotion(25%)3applic4. Crotamiton 1%
twicedailyx2weeks5. Ivermectin 12mg,singleoraldose
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Symptomatic Antipruritic Secinfection Antibiotics Eczematization
Steroids TreatContacts both
symptomatic/asymptomatic
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NORWEGIANSCABIES
(Crustedscabies)
Immunocompromised
Diabetic
Leukemia
Lymphomas
Mentalillnesses
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SpecificFeatures
nopruritus (Slight)
Mites Millions
Sources forlargeoutbreaks
Treatment sameasscabies repeat
Methotrexate
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Animalscabies(mange)
Cat,dog
Noburrows
Selflimiting
Treatanimal
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PEDICULOSIS
Pediculus humanus
var.Capitis P.capitis
var.Corporis P.corporis
Phthirus pubis Pediculosis pubis
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Lifecycle
Lifespan40Days
300eggsinlife:710eggs/day
Adultfemaleeggs(nits)in7days
Copulation adult(1month) nymph
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Pediculosis capitis
Pediculus humanus var.capitis
Closeintimatecontact
Combs,bed,
unhygienicliving
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Clinicalfeatures
Scalppruritus
Scalppyoderma
Suboccipital
CervicalL.N.
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DiagnosisMite adult,nymph,eggs
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Treatment
Permethrin 1%
GBHC1%
25%Benzylbenzoate
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Pediculosis corporis(Vagabondsdisease)
Pediculus humanus var.corporisMorphologicallysame white/grey
Generalised pruritusExcoriationsSecondaryinfection
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Seams of clothes
Sharing clothes
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DiagnosisDemonstrationofmite/nymph/egg
TreatmentDisinfectclothes
Wash steamIron
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Pediculosis pubis(Phthirus pubis)
Sexuallytransmitteddisease
Generalized pruritus
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Site - pubic hair- axillary hair- umbilicus- eyebrows-
eyelashes
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Diagnosis
Lice adult,eggs,nymph
Treatment
SameasPediculosis capitisTreatsexualpartner(s)
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Larvamigrans(Creepingeruption)
Cutaneous larvamigrans
Ankylostoma brazalienseGnathosterma spinigerum
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Strongyloides stercoralisLarvacurrens
DermatitisWavyStreaky
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TreatmentThiabendazole underocclusionAlbendazoleExcision
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MYIASIS(Maggotinfestation)Primary
FuruncularSubcutaneousmigratory
SecondaryWoundmyiasis
DipteraHypoderma
GastrophilusOestrusDermatobisMusca
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Treatment
Turpentineoil
Manualextraction
Exploration
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LeishmaniasisVisceral(Kalaazar)
Cutaneous
Orientalsore(Delhiboil)
L.tropica
L.major
L.aethiopica
Vector Sandfly (Phlebotomus)
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Clinicalfeatures
I.P. 2months
Smallnodule
Ulcer23months
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DiagnosisBiopsy granulomaLDbodies
TreatmentAntimonycompounds(Sodiumstibogluconate
10mg/kgx34timesKetoconazoleItraconazole
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