ANTIPROTOZOAL Flashcards
(196 cards)
What percentage of the world’s population is affected by amebiasis?
About 10%
Amebiasis causes invasive disease in about 50 million people and results in approximately 100,000 deaths annually.
Which species of Entamoeba requires treatment for amebiasis?
E. histolytica
E. histolytica is the third-leading cause of mortality by parasitic infection.
How is amebiasis primarily transmitted?
Fecal-oral route
What are the major clinical manifestations of E. histolytica infection?
- Colitis
- Bloody diarrhea (amebic dysentery)
- Amebic liver abscess
What is the cornerstone therapy for amebiasis?
Metronidazole or its analogue tinidazole
What additional treatment is recommended for patients with amebic colitis or liver abscess?
A luminal agent in addition to metronidazole
Luminal agents include paromomycin and iodoquinol.
What is the causative agent of giardiasis?
Giardia intestinalis
Which populations are at higher risk for giardiasis transmission?
- Children in day-care centers
- Institutionalized individuals
- Male homosexuals
What are the three syndromes associated with Giardia infection?
- Asymptomatic carrier state
- Acute self-limited diarrhea
- Chronic diarrhea with malabsorption
What is the treatment of choice for giardiasis?
Metronidazole
Tinidazole may be superior, and paromomycin is safe for pregnant women.
What organism causes trichomoniasis?
Trichomonas vaginalis
What is the most common nonviral sexually transmitted disease?
Trichomoniasis
What is the main treatment for trichomoniasis?
Metronidazole
What is the primary host for Toxoplasma gondii?
Cats and other feline species
What are common routes of infection for toxoplasmosis in humans?
- Ingestion of undercooked meat
- Ingestion of contaminated vegetables
- Direct contact with cat feces
- Transplacental infection
What is a common clinical manifestation of congenital toxoplasmosis?
Chorioretinitis
What is the primary treatment for toxoplasmic encephalitis?
Pyrimethamine and sulfadiazine with folinic acid
What is the role of spiramycin in toxoplasmosis treatment?
Used to treat acute acquired toxoplasmosis in early pregnancy
What are the primary pathogens causing cryptosporidiosis?
- Cryptosporidium parvum
- Cryptosporidium hominis
How are Cryptosporidia transmitted?
Direct human-to-human contact or contaminated water supplies
What is the treatment for cryptosporidiosis in immunocompetent individuals?
Nitazoxanide
What is the most effective therapy for cryptosporidiosis in immunocompromised patients?
Restoration of immune function
What is trypanosomiasis commonly known as?
Sleeping sickness.
What organism causes trypanosomiasis?
Trypanosoma brucei.