Microbes of Skin, Eyes & Nervous System Diseases

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Questions and Answers

What characteristic is shared by S.pyogenes and S.aureus?

  • Both produce exotoxins
  • Both are gram-negative bacteria
  • Both can cause skin infections (correct)
  • Both are intracellular pathogens

Which disease is caused by Bartonella henselae?

  • Pneumonia
  • Scarlet fever
  • Anthrax
  • Cat scratch disease (correct)

What symptom is characteristic of Pseudomonas aeruginosa infections?

  • Black ulcer
  • Painful blisters or ulcers
  • Severe sore throat
  • Greenish-blue pus (correct)

Which bacterium is known for being highly resistant to antibiotics?

<p>Pseudomonas aeruginosa (C)</p> Signup and view all the answers

What type of organism is Rickettsia riskettsii?

<p>Obligate intracellular parasite (C)</p> Signup and view all the answers

Which of the following diseases is associated with Clostridium perfringens?

<p>Gas gangrene (C)</p> Signup and view all the answers

Which characteristic is specific to the Herpes Simplex virus?

<p>Enveloped virus that can remain latent (A)</p> Signup and view all the answers

What is a hallmark symptom of bacillus anthracis infection?

<p>Black eschar in cutaneous anthrax (A)</p> Signup and view all the answers

What type of pathogen is Varicella-Zoster Virus?

<p>DNA virus (B)</p> Signup and view all the answers

Which microorganism is most commonly associated with infecting immunocompromised individuals?

<p>Bartonella henselae (A)</p> Signup and view all the answers

What is a symptom indicative of S.pyogenes infection?

<p>Severe pain (D)</p> Signup and view all the answers

How does Clostridium perfringens typically cause food poisoning?

<p>By contaminating food through spore survival (A)</p> Signup and view all the answers

Which bacterium is known for producing exotoxins that can lead to severe infections?

<p>Streptococcus pyogenes (C)</p> Signup and view all the answers

What type of organism causes measles?

<p>RNA virus (C)</p> Signup and view all the answers

Which of the following symptoms is characteristic of rubella?

<p>Swollen lymph nodes (A)</p> Signup and view all the answers

What is a common transmission method for rabies?

<p>Saliva of infected animals (A)</p> Signup and view all the answers

Which organism is responsible for causing chlamydia?

<p>Gram-negative bacterium (D)</p> Signup and view all the answers

What is a hallmark symptom of tetanus?

<p>Jaw cramping (B)</p> Signup and view all the answers

What type of virus is associated with causing painful nerve cell damage and a blistering rash on one side of the body?

<p>DNA virus (A)</p> Signup and view all the answers

Which symptom is commonly associated with parvovirus B19 infection in children?

<p>Slapped cheek rash (C)</p> Signup and view all the answers

Which condition is caused by human papillomavirus (HPV)?

<p>Cervical dysplasia (C)</p> Signup and view all the answers

What is a distinctive feature of sporotrichosis?

<p>Ulcerative lesions along lymph nodes (C)</p> Signup and view all the answers

What type of infection results from Clostridium botulinum?

<p>Foodborne illness (B)</p> Signup and view all the answers

Which of the following is true about common warts caused by HPV?

<p>They typically resolve on their own. (C)</p> Signup and view all the answers

What is a unique characteristic of dermatophytes?

<p>They infect skin, hair, and nails. (D)</p> Signup and view all the answers

What condition is associated with conjunctivitis?

<p>Eye redness and discharge (C)</p> Signup and view all the answers

What symptom is commonly associated with the chronic infection of Mycobacterium leprae?

<p>Thickened skin (A)</p> Signup and view all the answers

Flashcards

Shingles

A painful, blistering rash typically on one side of the body, caused by the reactivation of the varicella-zoster virus (VZV). It often presents with nerve pain.

Human Papillomavirus (HPV)

A viral infection that causes a variety of warts on the skin. Different strains of HPV can lead to different types of warts, including common warts, plantar warts, and genital warts. Some strains of HPV are linked to cervical cancer.

Rubella

A highly contagious disease that causes a rash, fever, swollen lymph nodes, and joint pain. It can be dangerous for pregnant women as it can cause complications for the fetus.

Measles (Rubeola Virus)

A highly contagious viral illness known as 'measles'. It is characterized by fever, cough, runny nose, red eyes, and the distinctive Koplik spots in the mouth. A red, blotchy rash follows, spreading from the face down.

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Erythema Infectiosum (Fifth Disease)

A viral infection that causes a distinctive 'slapped cheek' rash on the face. It is common in children and usually causes mild symptoms like runny nose, headache, and a low fever. The rash can spread to the body, creating a lacy appearance.

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Roseola (Human Herpesvirus 6/7)

A viral infection that causes a high fever followed by a pink rash. It is common in infants and young children. The rash starts on the trunk and spreads to the limbs as the fever subsides.

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Dermatophytes

A group of fungi that infect skin, hair, and nails. They are responsible for conditions like ringworm, athlete's foot, and jock itch. The infections typically present with circular, red, itchy, scaly patches on the skin.

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Sporotrichosis (Rose Gardener’s Disease)

A dimorphic fungus that can exist as a mold in the environment and as a yeast in the body. This fungal infection can cause painful bumps that become ulcers, often on the hands and arms. It can spread along lymphatic channels, leading to nodular lesions.

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Polio (Poliovirus)

A viral infection that causes a range of symptoms including muscle weakness, fever, headache, sore throat, nausea, and in severe cases, paralysis of limbs and respiratory muscles. It is spread through fecal-oral transmission.

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Rabies

A fatal viral infection that is spread through the saliva of infected animals. It causes a variety of symptoms, including fever, headache, muscle spasms, difficulty swallowing, and excessive salivation. In the later stages, it can lead to hydrophobia (fear of water) and neurological symptoms..

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Leprosy (Hansen's Disease)

A chronic infectious disease caused by Mycobacterium leprae. It is characterized by skin lesions, numbness, muscle weakness, thickened skin, and loss of sensation. In advanced stages, it can lead to deformities.

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Botulism

caused by Clostridium botulinum bacteria, which produces a potent neurotoxin. Symptoms include muscle weakness, double vision, droopy eyelids, difficulty swallowing, and in severe cases, respiratory paralysis.

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Tetanus

caused by Clostridium tetani bacteria, which produces a toxin that attacks the nervous system. It is characterized by muscle stiffness, jaw cramping, difficulty swallowing, and muscle spasms. In severe cases, it can lead to respiratory failure.

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Chlamydia

A common bacterial infection that can be spread through sexual contact or during childbirth. It often causes no symptoms, but in some cases, it can lead to discharge, burning during urination, pelvic pain, and potentially eye infection.

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Conjunctivitis (Pink Eye)

A common eye infection that can be caused by bacteria, viruses, or allergens. It causes redness, itching, discharge, tearing, and swelling of the eye.

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What is Staphylococcus aureus?

A bacterium known for its ability to form clusters of round-shaped cells (cocci) and its resistance to antibiotics, especially methicillin.

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What is Streptococcus pyogenes?

A type of bacteria that forms chains (strepto) of round-shaped cells (cocci) and is known to be a prominent cause of infections like strep throat and scarlet fever.

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What is Bartonella henselae?

A bacteria responsible for cat scratch disease, characterized by swollen lymph nodes near the area of a cat scratch.

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What is Pseudomonas aeruginosa?

An opportunistic bacterium known for its blue-green pigment and ability to thrive in moist environments, causing various infections including pneumonia and urinary tract infections.

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What is Rickettsia rickettsii?

A bacterium that lives inside cells (obligate intracellular parasite) and is transmitted by ticks, causing Rocky Mountain spotted fever.

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What is Bacillus anthracis?

A bacterium that forms spores (anthracis), making it highly resistant to harsh conditions, and is responsible for the disease anthrax.

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What is Clostridium perfringens?

A bacterium that produces spores, often found in soil and intestines, and is known for causing gas gangrene and food poisoning.

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What is Herpes simplex virus?

A virus known for causing cold sores (HSV-1) and genital herpes (HSV-2), which both manifest as painful blisters or ulcers.

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What is Varicella-zoster virus?

A virus that causes chickenpox (varicella) and shingles (zoster), both characterized by distinctive rash and blisters.

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What is a skin infection caused by Staphylococcus aureus?

A type of infection caused by the bacteria Staphylococcus aureus, commonly manifesting as boils, abscesses, and skin infections.

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What is Strep throat?

A throat infection caused by the Streptococcus pyogenes bacteria, characterized by sore throat, fever, and sometimes a red rash.

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What is Cat Scratch Disease?

A bacterial infection caused by Bartonella henselae, usually transmitted through a cat scratch, characterized by swollen lymph nodes near the infection site.

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What is a Pseudomonas aeruginosa infection?

An infection caused by Pseudomonas aeruginosa, often associated with moist environments like hot tubs, and characterized by a green-blue colored pus and a fruity odor.

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What is Rocky Mountain Spotted Fever?

A tick-borne illness caused by Rickettsia rickettsii bacteria, known for a characteristic spotted rash that begins on extremities and spreads inward.

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What is Anthrax?

A serious disease caused by the bacterium Bacillus anthracis, with various forms including cutaneous (skin), inhalational, and gastrointestinal.

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Study Notes

Skin, Eyes, Nervous System Microbes

  • Organism: Microbes associated with skin, eyes, and nervous system diseases.
  • Type of organism: Includes bacteria, viruses, fungi classified by their characteristics (gram-positive, gram-negative, cocci, bacilli, etc.) and their behavior (e.g., intracellular, opportunistic).
  • Diseased caused: Various infections and conditions are listed, including specific examples like Impetigo, Strep throat, Scarlet fever, Rocky Mountain spotted fever, Anthrax, etc.
  • Sign and symptoms: Symptoms of each listed infection, e.g., redness, swelling, pus, fever, nausea, vomiting, sore throat, rash, etc.
  • Hallmark of disease (if any): Features unique to specific infections like MRSA, rapid progression, swollen lymph nodes, green/blue pigmentation, black eschar, etc.
  • Remarks: Noteworthy details about each infection, including resistance to antibiotics, transmission methods (tick bites, contact, inhalation, etc.), and locations where infections commonly occur (soil, water, etc.)
  • Specific examples: Included in the list are gram-positive, gram-negative bacteria and virus types.
  • Additional classifications: Classification of the microbes according to their characteristics, and the diseases they cause (e.g., Herpes Simplex Virus causing oral herpes, genital herpes).
  • Conjunctivitis: Described as bacterial, viral or due to allergens, with symptoms like redness in white of the eye, itching, discharge, tearing and swelling. The specific mention of the cause/pathogen can assist in diagnosis.

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