Microbiology Major Skin Infections
38 flashcards covering Microbiology Major Skin Infections for the MICROBIOLOGY Microbiology Topics section.
Major skin infections are a significant focus in microbiology, encompassing a range of conditions caused by various pathogens, including bacteria, fungi, and viruses. The Centers for Disease Control and Prevention (CDC) provides guidelines on the identification and management of these infections, which are essential for healthcare professionals to understand in order to prevent and treat them effectively.
In practice exams and competency assessments for General Microbiology, questions often involve identifying specific pathogens associated with skin infections, their transmission routes, and appropriate treatment options. Common traps include confusing similar-sounding pathogens or misapplying treatment protocols based on outdated information. A frequent oversight in clinical settings is the failure to consider the role of antibiotic resistance in skin infections, which can significantly impact treatment outcomes.
Terms (38)
- 01
What is the primary causative agent of impetigo?
The primary causative agent of impetigo is Staphylococcus aureus, although Streptococcus pyogenes can also be involved (Tortora Funke Case, chapter on skin infections).
- 02
How is cellulitis typically treated?
Cellulitis is typically treated with antibiotics, such as penicillin or cephalexin, depending on the causative organism (Bauman Microbiology, chapter on bacterial infections).
- 03
What are the common symptoms of folliculitis?
Common symptoms of folliculitis include red, inflamed bumps around hair follicles, often with pus-filled heads (Tortora Funke Case, chapter on skin infections).
- 04
Which organism is most commonly associated with necrotizing fasciitis?
Necrotizing fasciitis is most commonly associated with Streptococcus pyogenes, although other bacteria can also be involved (Bauman Microbiology, chapter on skin infections).
- 05
What is the incubation period for chickenpox?
The incubation period for chickenpox is typically 10 to 21 days after exposure to the varicella-zoster virus (Tortora Funke Case, chapter on viral infections).
- 06
What is the role of the immune system in preventing skin infections?
The immune system prevents skin infections by providing barriers (like skin), producing antimicrobial peptides, and activating immune cells to respond to pathogens (Bauman Microbiology, chapter on host defenses).
- 07
What is the most effective way to prevent the spread of MRSA in healthcare settings?
The most effective way to prevent the spread of MRSA in healthcare settings is through proper hand hygiene and the use of personal protective equipment (Tortora Funke Case, chapter on infection control).
- 08
When should a healthcare worker suspect scabies in a patient?
A healthcare worker should suspect scabies when a patient presents with intense itching, especially at night, and a rash with small blisters and burrows (Bauman Microbiology, chapter on ectoparasites).
- 09
What is the characteristic lesion of herpes simplex virus infection?
The characteristic lesion of herpes simplex virus infection is a group of vesicles on an erythematous base, often painful (Tortora Funke Case, chapter on viral infections).
- 10
How is athlete's foot primarily transmitted?
Athlete's foot is primarily transmitted through direct contact with infected surfaces, such as floors or towels (Bauman Microbiology, chapter on fungal infections).
- 11
What is the causative agent of ringworm?
The causative agents of ringworm are dermatophyte fungi, including Trichophyton, Microsporum, and Epidermophyton species (Tortora Funke Case, chapter on fungal infections).
- 12
What is the recommended treatment for a mild case of acne?
The recommended treatment for a mild case of acne includes topical retinoids and benzoyl peroxide (Bauman Microbiology, chapter on skin infections).
- 13
What is the significance of the Tzanck smear in diagnosing herpes infections?
The Tzanck smear is significant in diagnosing herpes infections as it reveals multinucleated giant cells, indicative of herpes simplex virus (Tortora Funke Case, chapter on viral infections).
- 14
What are the common risk factors for developing cellulitis?
Common risk factors for developing cellulitis include breaks in the skin, obesity, and chronic conditions such as diabetes (Bauman Microbiology, chapter on skin infections).
- 15
What is the primary mode of transmission for the varicella-zoster virus?
The primary mode of transmission for the varicella-zoster virus is through respiratory droplets or direct contact with the fluid from chickenpox blisters (Tortora Funke Case, chapter on viral infections).
- 16
What is the role of antibiotics in treating skin infections?
Antibiotics play a crucial role in treating bacterial skin infections by inhibiting bacterial growth or killing bacteria (Bauman Microbiology, chapter on bacterial infections).
- 17
What is the common name for tinea pedis?
The common name for tinea pedis is athlete's foot, a fungal infection affecting the feet (Tortora Funke Case, chapter on fungal infections).
- 18
What are the clinical features of shingles?
The clinical features of shingles include a painful rash that develops into blisters, typically localized to one side of the body, following a dermatomal distribution (Bauman Microbiology, chapter on viral infections).
- 19
What is the incubation period for impetigo?
The incubation period for impetigo is typically 2 to 10 days after exposure to the bacteria (Tortora Funke Case, chapter on skin infections).
- 20
How often should healthcare workers wash their hands to prevent skin infections?
Healthcare workers should wash their hands frequently, especially before and after patient contact, to prevent skin infections (Bauman Microbiology, chapter on infection control).
- 21
What is the primary treatment for scabies?
The primary treatment for scabies is the application of topical scabicides, such as permethrin or lindane (Tortora Funke Case, chapter on ectoparasites).
- 22
What is the causative agent of candidiasis?
The causative agent of candidiasis is Candida albicans, a type of yeast (Bauman Microbiology, chapter on fungal infections).
- 23
What is the most common viral cause of skin warts?
The most common viral cause of skin warts is human papillomavirus (HPV) (Tortora Funke Case, chapter on viral infections).
- 24
What are the signs of a systemic infection from a skin infection?
Signs of a systemic infection from a skin infection may include fever, chills, and increased heart rate (Bauman Microbiology, chapter on skin infections).
- 25
What is the recommended method for diagnosing fungal skin infections?
The recommended method for diagnosing fungal skin infections is through KOH preparation and culture of skin scrapings (Tortora Funke Case, chapter on fungal infections).
- 26
What type of hypersensitivity reaction is involved in contact dermatitis?
Contact dermatitis involves a type IV hypersensitivity reaction, which is delayed and mediated by T cells (Bauman Microbiology, chapter on skin infections).
- 27
What is the common treatment for a boil?
The common treatment for a boil includes incision and drainage, along with antibiotics if necessary (Tortora Funke Case, chapter on skin infections).
- 28
How does the body respond to a staphylococcal skin infection?
The body responds to a staphylococcal skin infection by initiating an inflammatory response, which includes redness, swelling, and pus formation (Bauman Microbiology, chapter on bacterial infections).
- 29
What is the incubation period for ringworm?
The incubation period for ringworm can vary but is generally 4 to 14 days after exposure to the fungus (Tortora Funke Case, chapter on fungal infections).
- 30
What is the primary method of prevention for skin infections in athletes?
The primary method of prevention for skin infections in athletes is maintaining good hygiene and avoiding sharing personal items (Bauman Microbiology, chapter on skin infections).
- 31
What is the role of culture and sensitivity testing in skin infections?
Culture and sensitivity testing is used to identify the causative organism and determine the most effective antibiotic for treatment (Tortora Funke Case, chapter on bacterial infections).
- 32
What are the common complications of untreated cellulitis?
Common complications of untreated cellulitis include abscess formation, sepsis, and spread of infection to deeper tissues (Bauman Microbiology, chapter on skin infections).
- 33
What is the primary characteristic of a viral exanthem?
The primary characteristic of a viral exanthem is a widespread rash that occurs in response to a viral infection (Tortora Funke Case, chapter on viral infections).
- 34
What is the treatment for a severe case of acne?
The treatment for a severe case of acne may include oral isotretinoin, which is effective in reducing sebaceous gland activity (Bauman Microbiology, chapter on skin infections).
- 35
What is the significance of a skin culture?
A skin culture is significant as it helps identify the specific pathogen causing a skin infection, guiding appropriate treatment (Tortora Funke Case, chapter on bacterial infections).
- 36
What is the first step in managing a patient with suspected necrotizing fasciitis?
The first step in managing a patient with suspected necrotizing fasciitis is to initiate broad-spectrum intravenous antibiotics and consult surgery for possible debridement (Bauman Microbiology, chapter on skin infections).
- 37
What are the common signs of a fungal skin infection?
Common signs of a fungal skin infection include itching, redness, and scaling of the skin (Tortora Funke Case, chapter on fungal infections).
- 38
What is the recommended treatment for athlete's foot?
The recommended treatment for athlete's foot includes topical antifungal medications such as clotrimazole or terbinafine (Bauman Microbiology, chapter on fungal infections).