د/الشيماء نصر
12-10-2009, 12:59 PM
السلام عليكم ورحمة الله وبركاته
عرفت ان امتحان الازهر اعمال السنه هيكون ان شاء الله حتى tissue nematodae
ياريت اعرف باقي الكليات هتمتحن لفين عشان اعرف هنكل باقي النيماتود ولا هنستنى تمتحنوا
ٍStrongyloides stercoralis
دوده خطيرة تصيب الانسان عن طريق اختراق الطور المعدي للجلد لما يمشي الانسان حافي على تراب فيه الطور المعدي
(زي hook worms)
الدوده دي مش اساسي تصيب الانسان فهي تقدر تعيش free living in soil
لان البيض الخاص بالدوده بيفقص داخل الامعاء في الانسان وبالتالي اللي بينزل مع البراز مش البيض بل
rhabditiform larva
اللي بتتحول في التراب لو كانت الظروف ملائمه لحياة الدوده( من حيث الحرارة والرطوبه وتوفر الغذاء )الى الاطوار البالغه مباشرة
mature adult males and femals which will copulate and give eggs which hatch into rahbditiform larva then adult (free living-type) and so on as long as soil conditions are favourable
if soil conditions are unfavourable rahbditiform larvae develope to filariform larvae
(instead of giving adult
which infect man by penetration of skin
http://www.dpd.cdc.gov/dpdx/images/ParasiteImages/S-Z/Strongyloidiasis/Strongyloides_LifeCycle.gif
habitat
duodenum and upper jejunum embedded in the mucosa
D.H
man is the most important definitive host of this parasite , but Dogs and chimpanzees are naturally infected with strains like those of man
infective stage
filariform larva
mode of infection
1
penetration of the skin by filariform larva
2
auto-infection
internal auto infection
when there is constipation for ex and rhabditiform larvae change to filariform larvae in the lumen of intestine before being expelled in stool these filariform larvae penetrate the intestinal mucosa
or external
when filariform larvae come out and penetrate the peri-anal skin
diagnostic stage
rhabditiform larva in the faeces
clincal picture
هامة جدا وواضحه في الكتاب
اهم شئ
Dissaminated strongyloidiasis
in persons with any immunosuppressive disease or drug as in AIDS patients
this may lead to massive invasion of the tissues as liver ,kidneys or CNS by migrating larvae of strongyloides
so strongyloides is considered one of the opportunistic helminthic infections
انتهازيه
Hyperinfection syndrome
rhabditiform larvae in lumen of intestine transform into filariform larvae ,penetrate into the wall of the gut and enter the blood stream to the lung and return to the intestine to become adult
the patient present with GIT symptoms ,dyspnea ,haemoptysis and weakness
hyper infection may lead to sever deblition and death
Diagnosis
rhabditiform larvae in stool (diagnostic stage)or in the sputum by direct simple smear NOT the egg
or adults in stool culture
the larvae in stool can be detected by Baermann's technique
ان شاء الله هاشرح ليكم
stoll's &Baermann's techniques
:wfk:
عرفت ان امتحان الازهر اعمال السنه هيكون ان شاء الله حتى tissue nematodae
ياريت اعرف باقي الكليات هتمتحن لفين عشان اعرف هنكل باقي النيماتود ولا هنستنى تمتحنوا
ٍStrongyloides stercoralis
دوده خطيرة تصيب الانسان عن طريق اختراق الطور المعدي للجلد لما يمشي الانسان حافي على تراب فيه الطور المعدي
(زي hook worms)
الدوده دي مش اساسي تصيب الانسان فهي تقدر تعيش free living in soil
لان البيض الخاص بالدوده بيفقص داخل الامعاء في الانسان وبالتالي اللي بينزل مع البراز مش البيض بل
rhabditiform larva
اللي بتتحول في التراب لو كانت الظروف ملائمه لحياة الدوده( من حيث الحرارة والرطوبه وتوفر الغذاء )الى الاطوار البالغه مباشرة
mature adult males and femals which will copulate and give eggs which hatch into rahbditiform larva then adult (free living-type) and so on as long as soil conditions are favourable
if soil conditions are unfavourable rahbditiform larvae develope to filariform larvae
(instead of giving adult
which infect man by penetration of skin
http://www.dpd.cdc.gov/dpdx/images/ParasiteImages/S-Z/Strongyloidiasis/Strongyloides_LifeCycle.gif
habitat
duodenum and upper jejunum embedded in the mucosa
D.H
man is the most important definitive host of this parasite , but Dogs and chimpanzees are naturally infected with strains like those of man
infective stage
filariform larva
mode of infection
1
penetration of the skin by filariform larva
2
auto-infection
internal auto infection
when there is constipation for ex and rhabditiform larvae change to filariform larvae in the lumen of intestine before being expelled in stool these filariform larvae penetrate the intestinal mucosa
or external
when filariform larvae come out and penetrate the peri-anal skin
diagnostic stage
rhabditiform larva in the faeces
clincal picture
هامة جدا وواضحه في الكتاب
اهم شئ
Dissaminated strongyloidiasis
in persons with any immunosuppressive disease or drug as in AIDS patients
this may lead to massive invasion of the tissues as liver ,kidneys or CNS by migrating larvae of strongyloides
so strongyloides is considered one of the opportunistic helminthic infections
انتهازيه
Hyperinfection syndrome
rhabditiform larvae in lumen of intestine transform into filariform larvae ,penetrate into the wall of the gut and enter the blood stream to the lung and return to the intestine to become adult
the patient present with GIT symptoms ,dyspnea ,haemoptysis and weakness
hyper infection may lead to sever deblition and death
Diagnosis
rhabditiform larvae in stool (diagnostic stage)or in the sputum by direct simple smear NOT the egg
or adults in stool culture
the larvae in stool can be detected by Baermann's technique
ان شاء الله هاشرح ليكم
stoll's &Baermann's techniques
:wfk: