Microbiology Flashcards
The stool exam revealed characteristic lemon shaped eggs, what is the organism?
Trichuris trichiura
Treatment for Trichuris trichiura
Mebendazole 500 mg once
or Albendazole 400 mg daily for 3 doses
The gravid female worms of this species migrate nocturnally to the perianal area to deposit its eggs producing nocturnal perianal pruritis.
Enterobius vermicularis
Diagnostic technique for Enterobius vermicularis
Scotch Tape or Clear Tape revealing ova which are oval shaped and flattened on one side.
Treatment for Enterobius vermicularis
Mebendazole 100 mg once
or Albendazole 400 mg once
Also treat family members
Capillaria philippinensis is obtained by eating _____
Raw or Undercooked Fish
Stool exam revealed characteristic peanut shaped ova (non protruding bipolar plugs)
Capillaria philippinensis
This parasite can cause rectal prolapse especially in heavy infection of children.
Trichuris trichiura
Trichinella spiralis is obtained by ______
Undercooked meat (usually pork)
Most commonly involved muscles affected by Trichinella spiralis
Extra ocular muscles, biceps, muscles of the jaw, neck lower back, and diaphragm
Most common organism associated with visceral larval migrans
Toxocaria canis
Cutaneous larva migrans (“creeping eruption”) is most commonly due to ________
Ancylostoma braziliense (dog and cat hookworm) Symptoms can be alleviated by Ivermectin or Albendazole
What is the most common cause of human eosinophilic meningitis?
Angiostrongylus cantonensis (rat lungworm)
How does Giardia lamblia reproduce?
Binary Fission
Cysts are oval and characteristically contain four nuclei.
Trophozoite are pear shaped, dorsally convex, flattened parasites with two nuclei no four pairs of flagella
Giardia lamblia
This parasite comply causes diarrhea in immunocompromised patients.
Cryptosporidium hominis
amd Cryptosporidium parvum
What is the etiologic agent of Chaga’s Disease?
Trypanosoma cruzi
What is the vector for Chaga’s Disease?
Reduviid Bugs (Hematophagus Triatomine Inescts, such as Kissing Bugs) Note infection occurs when feces of infected insect comes in contact with breaks in skin or conjunctivea
Most common organ affected in Chaga’s Disease
The Heart
What is this sign and disease associated with it?
Painless unilateral edema of the palpebrea and perioccular tissues.
Romaña’s Sign
It occurs when the conjunctiva is the site of entry of Trypanosomia cruzi as seen in Chaga’s Disease
What is the most common cause of death in Chaga’s Disease?
Heart Failure
What is the vector for African Sleeping Sickness (Afriacan Trypanosomiasis)?
Tsetse Fly
Enlargement of the posterior cervical lymph nodes seen in African Sleeping Sickness
Winterbottom Sign
What is the vector of leishmaniasis?
Sandflies of the genus Phlebotmus
What is the most important feature of visceral leishmaniasis?
Splenomegaly
