Chagas Disease, Listeria, and Campylobacter: An Overview
Chagas Disease, Listeria, and Campylobacter
Chagas Disease
Chagas’ Disease: The etiologic agent is Trypanosoma cruzi. The vector is the blood-sucking triatomine insect. The juvenile stages are epimastigotes and trypomastigotes (intestine). Transmission occurs through feces. In humans, trypomastigotes and amastigotes affect cells and transmit through the bloodstream as trypomastigotes, primarily in rural areas to the north.
Clinical Manifestations
The acute phase takes 20 to 30 days, often with no signs
Read MoreMicrobiology Q&A: Infections, Bacteria, Viruses & More
Cause of Strep Throat
- S. pyogenes, beta hemolytic, group A
Influenza Glycoproteins
From the outer envelope of influenza, the two glycoproteins are:
- Hemagglutinin and neuraminidase
Why No Common Cold Vaccine?
Vaccine for the common cold is not feasible because:
- There are over 100 types of rhinoviruses
Coccidioidomycosis Characteristics
Which is true of coccidioidomycosis?
- It is a soil fungus AND a dimorphic fungus
Tubercle Bacillus Resistance
The resistance of tubercle bacillus to virulence factors is probably
Isolation Techniques in Healthcare: Types and Protocols
Isolation Techniques in Healthcare
Isolation Techniques: The objective is to isolate contagious patients to prevent the transmission of disease to healthy individuals (standard isolation). Isolating patients also prevents them from contracting immunodeficiency-related diseases (protective isolation).
These techniques primarily address the second step of the epidemiological chain, utilizing mechanical and chemical barriers.
Isolation Protocols
Rules: Follow the protocol specified for each case. Keep
Read MoreUnderstanding Biotic Potential, Ecosystems, and Components
The biotic potential is the maximum reproductive capacity of living organisms under ideal environmental conditions. It represents the highest possible vital index of a species, occurring when the species has the highest birth rate and the lowest mortality rate. Primary factors determining biotic potential include the organism’s rate of reproduction and its litter size – the number of offspring produced at one birth.
Under ideal environmental conditions, a species’ capacity to reproduce is known
Read MoreRespiratory Infections and Mononucleosis: Diagnosis and Treatment
Respiratory Infections: A Comprehensive Overview
Upper Respiratory Tract Infections
Pharyngoamigdalitis
Most cases are viral, so antibiotics should only be administered when the patient has a fever > 38°C, exudate, anterior cervical lymphadenopathy, and absence of cough. The preferred treatment is Amoxicillin 500mg/8h for 10 days.
Rhinitis
Most cases are mucopurulent and viral. Antibiotics are only indicated when symptoms persist for more than 7 days, often involving sinus involvement.
Sinusitis
Common
Read MoreCommon Infectious Diseases: Malaria, Diarrhea, TB, AIDS, Flu & More
Common Infectious Diseases
Malaria
Malaria is caused by protozoan microorganisms of the genus Plasmodium, transmitted by Anopheles mosquitoes. These parasites infect liver cells and erythrocytes (red blood cells), where they reproduce. This cellular exploitation leads to episodes of intense fever, chills, anemia, and spleen inflammation due to the proliferation of defensive cells.
Malaria can be treated with medication, but reinfection is possible. A fully effective vaccine is not yet available.