Exam 3: BIOS 242 BIOS242 Latest

Exam 3: BIOS 242 / BIOS242 (Latest

Update 2025 / 2026) Fundamentals of Microbiology with Lab | Weeks 5 -

• Questions and Answers | 100%

Correct | Grade A - Chamberlain

Question:

AIDS

Answer:

VIRUS

Causative agent: HIV

Symptoms: pneumonia, Kaposi's sarcoma, weight loss, swollen lymph nodes,

loss of immune function

Prevention: safe sex practices, avoid sharing needles

Treatment: NRTIs, NNRTIs, PIs

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Question:

HIV progression of the levels of virus versus Helper T cells in the blood

Answer:

• initial infection- high levels of the virus

• virus numbers drop dramatically, antibodies appear, helper T cells decrease

• long period of asymptomatic infection, number of T cells steadily

decreasing, eventually low enough to be considered AIDS

• when AIDS occurs, antibodies are high but number of viruses increases

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Question:

HIV

Answer:

A virus that attacks and destroys the human immune system.-infects CD4 T helper cells, crippling both antibody and cell-mediated immunity

Question:

yeast infection/vaginal candidiasis

Answer:

FUNGUS

Causative agent: Candida albicans

Symptoms: itching & irritation of the vaginal area, white curd like discharge, redness & swelling, burning sensation

Prevention: avoid unnecessary antibiotic use, good genital hygiene, avoid

harsh/scented soaps

Treatment: topical antifungal medications (clotrimazole) or oral antifungal

medications (fluconazole)

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Question:

syphilis

Answer:

BACTERIA

Causative agent: Treponema pallidum

Symptoms:

-> primary- chancre (painless ulcer), swollen lymph nodes -> secondary- flu like symptoms (fever), skin rash (palms and soles) -> latent- no symptoms, but still infectious if within a year, antibodies present ->tertiary- gummas (soft tumor like growth), neurosyphilis causes headaches & personality changes, cardiovascular syphilis causes aneurysms

Prevention: safe sex practices, regular screening if at risk, prompt treatment,

avoid sex if in infectious stage

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