FINAL 08 - Mycoses Flashcards
Refers to mycoses localized along hair shafts and in superficial epidermal cells (Types of mycoses)
Superficial mycoses
A chronic superficial infection of the stratum corneum; characterized by discrete, serpentine, hyper or hypopigmented maculae that develop on the skin (Examples of superficial mycoses)
Pityriasis versicolor
Common name of pityriasis versicolor
Tinea versicolor
3 causative agents of pityriasis versicolor (Tinea versicolor) (MG, MF, MS)
Malassezia globosa, Malassezia furfur, Malassezia sympodialis
2 diagnostic tests for pityriasis versicolor (KW)
KOH mount, Wood lamp
The short, unbranched, nonpigmented hyphae and round spores that can be found in a KOH mount used to diagnose pityriasis versicolor resemble ____________
Spaghetti and meatballs
2 treatments for pityriasis versicolor (ST)
Selenium sulfide, Topical/oral azole
A chronic and asymptomatic infection of the stratum corneum; characterized by dark discoloration often on the palm (Examples of superficial mycoses)
Tinea nigra
Common name of tinea nigra
Tinea nigra palmaris
Causative agent of Tinea nigra; a dematiaceous fungi
Hortaea werneckii
3 treatments for Tinea nigra (KSA)
Keratolytic solutions, Salicylic acid, Azole antifungals
Characterized by a nodular infection of the hair shaft (Examples of superficial mycoses)
Black piedra
Causative agent of black piedra; a dematiaceous fungi
Piedraia hortae
Characterized by larger, softer, yellowish nodules on the hair shaft (Examples of superficial mycoses)
White piedra
Causative agent of white piedra
Trichosporon sp.
Refers to mycoses in keratinized tissues such as skin, hair, and nails; transmitted through direct contact (Types of mycoses)
Cutaneous mycoses
Was mistaken for ringworm or tinea; characterized by raised circular lesions (Examples of cutaneous mycoses)
Dermatophytosis
Causative agent of dermatophytosis
Dermatophytes (such as Microsporum, Trichophyton, Epidermophyton sp.)
Means soil-loving; dermatophytes that cause acute infections
Geophilic
Means animal-loving; dermatophytes that cause acute infections
Zoophilic
Means human-loving; dermatophytes that cause chronic infections
Anthropophilic
Tinea capitis (Location of dermatophytosis)
Scalp hair
Tinea barbae (Location of dermatophytosis)
Beard
Tinea faciei (Location of dermatophytosis)
Face
Tinea manuum (Location of dermatophytosis)
Hands
Tinea unguium (onychomycosis) (Location of dermatophytosis)
Nails
Tinea corporis (Location of dermatophytosis)
Trunk
Tinea imbricata (Location of dermatophytosis)
Trunk and limbs (in concentric/annular pattern)
Tinea cruris (jock itch) (Location of dermatophytosis)
Groin
Tinea pedis (athlete’s foot) (Location of dermatophytosis)
Feet
Dermatophytosis is diagnosed using a __________ mount
KOH mount
Occurs in broad-spectrum antibiotic overuse; risk factors include AIDS, pregnancy, and diabetes (Examples of cutaneous mycoses)
Candidiasis
Common name of candidiasis
Moniliasis
Causative agent of candidiasis
Candida albicans
Candidiasis is diagnosed using a __________ mount
KOH mount
Characterized by white, adherent, painless, discrete, or confluent patches of whitish pseudomembranes (Types of candidiasis)
Thrush
Characterized by irritation, pruritus, and vaginal discharge (Types of candidiasis)
Vulvovaginitis
Characterized by painful swelling at the nail-skin interface (Types of candidiasis)
Paronychia
Characterized by painful, erythematous swelling of the nail fold that may destroy the nail (Types of candidiasis)
Onychomycosis
Characterized by erythematous irritation with redness and pustules in skin folds (Types of candidiasis)
Intertrigo
Characterized by erythematous-pustular infection of the glans penis (Types of candidiasis)
Balanitis
Is an infection between the digits of the hands or toes (Types of candidiasis)
Erosio interdigitalis blastomycetica
Is a common, erythematous, pustular, perineal infection in infants (Types of candidiasis)
Diaper rash
2 treatments for candidiasis (TO)
Topical nystatin, Oral ketoconazole/fluconazole
Refers to the formation of granulomatous candidial lesions on any or all cutaneous and/or mucosal surfaces (Examples of cutaneous mycoses)
Chronic mucocutaneous candidiasis (CMC)
Refers to mycoses in tissues beneath the skin (Types of mycoses)
Subcutaneous mycoses
A chronic granulomatous infection typically followed by a secondary spread with involvement of the draining lymphatics and lymph nodes (Examples of subcutaneous mycoses)
Sporotrichosis
Common name of sporotrichosis
Rose gardener’s disease
Causative agent of sporotrichosis; a dimorphic fungi
Sporothrix schenckii
Nodule that may progress to a necrotic or ulcerative lesion (Clinical findings of Sporothrix schenckii)
Lymphocutaneous-granulomatous nodule
Mimics chronic cavitary tuberculosis when inhaled by those with impaired cellular immunity (Clinical findings of Sporothrix schenckii)
Primary pulmonary sporotrichosis
Sporothrix schenckii is a __________ yeast, often with surrounding asteroid body
Cigar-shaped yeast
A subcutaneous mycotic infection caused by traumatic inoculation of fungi, which reside in soil and vegetation (Examples of subcutaneous mycoses)
Chromoblastomycosis
Common name of chromoblastomycosis
Chromomycosis
Chromoblastomycosis is diagnosed using a __________ mount
KOH mount
Characterized by a presence of darkly pigmented septate hyphae in tissue; appears as a solitary encapsulated cyst and can lead to sinusitis and brain abscess (Examples of subcutaneous mycoses)
Phaeohyphomycosis
A chronic subcutaneous infection induced by traumatic inoculation with fungi or actinomycetous bacteria (Examples of subcutaneous mycoses)
Mycetoma
Refers to mycoses that affects many organs deep within the body; is transmitted through inhalation and caused by dimorphic fungi (Types of mycoses)
Primary systemic mycoses
May be asymptomatic; is also characterized by self-limited influenza-like illness with fever, malaise, cough, arthralgia, and headache (Examples of primary systemic mycoses)
Coccidioidomycosis
2 common names of coccidioidomycosis (SD)
San Joaquin valley fever, Desert rheumatism
2 causative agents of coccidioidomycosis (CP, CI)
Coccidioides posadasii, Coccidioides immitis
Refers to arthroconidia that enlarge, become rounded, develop internal septations, and contain endospores; present in coccidioidomycosis
Spherules
The most prevalent pulmonary fungal infection in humans and animals; transmitted from bird and bat guano (Examples of primary systemic mycoses)
Histoplasmosis
Common name of histoplasmosis
Spelunker’s disease
Causative agent of histoplasmosis; a facultative intracellular parasite that is able to replicate within alveolar macrophages
Histoplasma capsulatum
Histoplasmosis can become __________ in the immunosuppressed
Progressive disseminated histoplasmosis (PDH)
A chronic infection with granulomatous and suppurative lesions that is initiated in the lungs (Examples of primary systemic mycoses)
Blastomycosis
2 common names of blastomycosis (NG)
North American blastomycosis, Gilchrist disease
Causative agent of blastomycosis
Blastomyces dermatitidis
Characterized by fever, malaise, night sweats, cough, and myalgias (Clinical findings of Blastomyces dermatitidis)
Acute LRTI
Characterized by a pyogranulomatous reaction with neutrophils and noncaseating granulomas (Clinical findings of Blastomyces dermatitidis)
Chronic pneumonia
Blastomycosis that affects the skin, bone, CNS, larynx, and GUT (Clinical findings of Blastomyces dermatitidis)
Disseminated blastomycosis
Comes in an acute/juvenile form and chronic adult form; is treated using an oral or systemic antifungal (Examples of primary systemic mycoses)
Paracoccidioidomycosis
Common name of paracoccidioidomycosis
South American blastomycosis
Causative agent of paracoccidioidomycosis
Paracoccidioides brasiliensis
Paracoccidioidomycosis is diagnosed using a __________ mount
KOH mount
Uncommon, usually <30 years old; is a disseminated infection of the reticuloendothelial system (Forms of paracoccidioidomycosis)
Acute/juvenile form
~90%, usually in older men; is a progressive pulmonary disease in the lower lobes of the lungs with fibrosis (Forms of paracoccidioidomycosis)
Chronic/adult form
The most prevalent systemic mycosis; associated with corticosteroids or other immunosuppressive agents, hematologic diseases, or with chronic granulomatous disease (Examples of opportunistic systemic mycoses)
Systemic candidiasis
Systemic candidiasis is due to __________, caused by indwelling catheters, surgery, IV drug abuse, aspiration, or damage to the skin or GIT
Candidemia
More common in patients with HIV/AIDS; treated using a combination of systemic antifungals (Examples of opportunistic systemic mycoses)
Cryptococcosis
2 causative agents of cryptococcosis; they have polysaccharide capsules and they are present in pigeon droppings (CN, CG)
Cryptococcus neoformans, Cryptococcus gattii
Disease caused by Aspergillus fumigatus
Aspergillosis
Causative agent of aspergillosis
Aspergillus fumigatus
Characterized by asthma, recurrent chest infiltrates, and eosinophilia (Clinical findings of Aspergillus fumigatus)
Allergic bronchopulmonary aspergillosis
Characterized by cough, dyspnea, weight loss, fatigue, and hemoptysis (Clinical findings of Aspergillus fumigatus)
Fungus ball
Associated with lymphocytic or myelogenous leukemia and lymphoma (Clinical findings of Aspergillus fumigatus)
Invasive aspergillosis
Occurs in 1/3 of ART-treated AIDS patients; a paradoxical worsening of preexisting, untreated, or partially treated opportunistic infections (Clinical findings of Aspergillus fumigatus)
Immune reconstitution inflammatory syndrome (IRIS)
Associated with acidotic patients, leukemias, lymphoma, corticosteroid treatment, severe burns, immunodeficiencies, and dialysis of deferoxamine (Examples of opportunistic systemic mycoses)
Mucormycosis (Zygomycosis)
Most common causative agent of mucormycosis (zygomycosis)
Rhizopus oryzae
Involves the invasion of the sinuses, eyes, and brain; characterized by edema of the involved facial area, a bloody nasal exudate, and orbital cellulitis (Clinical findings of Rhizopus oryzae)
Rhinocerebral mucormycosis
Involves the thoracic area (Clinical findings of Rhizopus oryzae)
Thoracic mucormycosis
Associated with AIDS; leads to acute/subacute pneumonia and extrapulmonary infections (Examples of opportunistic systemic mycoses)
Pneumocystis pneumonia
Causative agent of pneumocystis pneumonia; formerly thought of as a protozoan; has two forms: trophozoite and cyst
Pneumocystis jiroveci
Initially characterized by a vague sense of dyspnea alone that subsequently manifests as fever and nonproductive cough with progressive SOB (Clinical findings of Pneumocystis jiroveci)
Acute/Subacute pneumonia
Is rare; can include involvement of almost any organ, most notably the lymph nodes, spleen, and liver (Clinical findings of Pneumocystis jiroveci)
Extrapulmonary manifestations
2 treatments for pneumocystis pneumonia (CA)
Cotrimoxazole, ART in AIDS
Associated with HIV/AIDS, tuberculosis, corticosteroid treatment, and lymphoproliferative diseases (Examples of opportunistic systemic mycoses)
Talaromycosis (Penicilliosis)
Causative agent of talaromycosis (penicilliosis)
Talaromyces marneffei
Treatment for talaromycosis (penicilliosis)
Systemic antifungal