30 Questions
Which type of drugs cause serious toxic effects in the host, particularly on cells showing high metabolic activity?
Antiprotozoal drugs
What infection is caused by Entamoeba histolytica?
Amebiasis
Which disease can be acute or chronic, with varying degrees of illness, from no symptoms to mild diarrhea to fulminating dysentery?
Amebiasis
What is the main diagnostic method for establishing Amebiasis?
Isolating E. histolytica from feces
What is the classification of therapeutic agents for amebiasis based on?
Site of action in the body
Which type of amebicides are effective against both the luminal and systemic forms of amebiasis?
Mixed amebicides
What is the drug of choice for treating amebic infections?
Metronidazole
Which drug is a prodrug that is reduced intracellularly by anaerobic bacteria to its active form?
Metronidazole
Which drug is effective against E. histolytica trophozoites and cyst forms?
Iodoquinol
Which drug accumulates in patients with severe hepatic disease?
Metronidazole
Which drug should be avoided during alcohol consumption?
Tinidazole
Which drug is used for treatment of giardiasis and trichomoniasis?
Tinidazole
Which drug is used for treatment of asymptomatic colonization state after completion of invasive intestinal or extra-intestinal amebic disease treatment?
Paromomycin
Which drug has adverse effects including rash, diarrhea, and dose-related peripheral neuropathy, including a rare optic neuritis?
Iodoquinol
Amebiasis is an infection of the intestinal tract caused by Entamoeba ______.
histolytica
Anti-protozoal drugs are used for the treatment of Amebiasis, Malaria, Trypanosomiasis, Leishmaniasis, Toxoplasmosis, and ______.
Giardiasis
Therapeutic agents for amebiasis are classified according to the site of action as: Luminal amebicides act on the parasite in the lumen of the bowel, Systemic amebicides are effective against amebas in the intestinal wall and ______.
liver
Amebiasis can be acute or chronic, with varying degrees of illness, from no symptoms to mild diarrhea to fulminating ______.
dysentery
Diagnosis of Amebiasis is established by isolating E. ______ from feces.
histolytica
Therapy for Amebiasis is indicated for acutely ill patients and asymptomatic carriers, since dormant E. histolytica may cause future infections in the carrier and be a potential source of infection for ______.
others
Metronidazole, a nitroimidazole, is the __________ amebicide of choice for treating amebic infections.
mixed
Metronidazole is the drug of choice for the treatment of pseudomembranous colitis caused by the anaerobic Clostridium __________.
difficile
Metronidazole is a prodrug that is reduced intracellularly by the anaerobic bacteria to its active ________.
form
Metronidazole is completely and rapidly absorbed after oral administration and therapeutic levels can be found in vaginal and seminal fluids, saliva, breast milk, and cerebrospinal fluid (CSF). The drug accumulates in patients with severe ________ disease.
hepatic
The parent drug and its metabolites are excreted in the ________.
urine
Tinidazole is a second-generation nitroimidazole that is similar to metronidazole in spectrum of activity, absorption, adverse effects, and drug ________.
interactions
Tinidazole is as effective as metronidazole, with a shorter course of treatment, but it is more ________.
expensive
A luminal agent, such as: iodoquinol, diloxanide furoate, paromomycin, should be administered for treatment of the asymptomatic colonization ________.
state
Iodoquinol, a halogenated 8- hydroxyquinolone, is amebicidal against E. histolytica and is effective against the luminal trophozoite and cyst ________.
forms
Adverse effects of iodoquinol include rash, diarrhea, and dose-related peripheral neuropathy, including a rare optic ________.
neuritis
Study Notes
Amebiasis and Anti-Protozoal Drugs
- Amebiasis is an infection of the intestinal tract caused by Entamoeba histolytica.
- The disease can be acute or chronic, with varying degrees of illness, from no symptoms to mild diarrhea to fulminating dysentery.
Anti-Protozoal Drugs
- Anti-protozoal drugs are used for the treatment of Amebiasis, Malaria, Trypanosomiasis, Leishmaniasis, Toxoplasmosis, and Giardiasis.
- Therapeutic agents for amebiasis are classified according to the site of action as:
- Luminal amebicides act on the parasite in the lumen of the bowel.
- Systemic amebicides are effective against amebas in the intestinal wall and extraintestinal tissues.
Diagnosis and Treatment
- Diagnosis of Amebiasis is established by isolating E. histolytica from feces.
- Therapy for Amebiasis is indicated for acutely ill patients and asymptomatic carriers, since dormant E. histolytica may cause future infections in the carrier and be a potential source of infection for others.
- Metronidazole, a nitroimidazole, is the drug of choice for treating amebic infections.
- Metronidazole is a prodrug that is reduced intracellularly by anaerobic bacteria to its active form.
- The drug accumulates in patients with severe hepatic disease.
- Metronidazole is completely and rapidly absorbed after oral administration and therapeutic levels can be found in vaginal and seminal fluids, saliva, breast milk, and cerebrospinal fluid (CSF).
Other Amebicides
- Tinidazole is a second-generation nitroimidazole that is similar to metronidazole in spectrum of activity, absorption, adverse effects, and drug interactions.
- Tinidazole is as effective as metronidazole, with a shorter course of treatment, but it is more expensive.
- Iodoquinol, a halogenated 8- hydroxyquinolone, is amebicidal against E. histolytica and is effective against the luminal trophozoite and cyst forms.
- Adverse effects of iodoquinol include rash, diarrhea, and dose-related peripheral neuropathy, including a rare optic neuritis.
- Iodoquinol is used for treatment of asymptomatic colonization state after completion of invasive intestinal or extra-intestinal amebic disease treatment.
- Tinidazole is used for treatment of giardiasis and trichomoniasis.
Learn about the overview and summary of antiprotozoal drugs used for the treatment of diseases like amebiasis, malaria, trypanosomiasis, leishmaniasis, toxoplasmosis, and giardiasis. Understand the chemotherapy for amebiasis and the infection of amebiasis (amebic dysentery).
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