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VIRAL DISEASES part II Andrews’ p501-525.

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Presentation on theme: "VIRAL DISEASES part II Andrews’ p501-525."— Presentation transcript:

1 VIRAL DISEASES part II Andrews’ p


3 Molluscum contagiosum
Poxvirus MCV-1 to -4 and variants MCV-2 in HIV Worldwide Children, sexually active adults and immunosuppressed Direct contact

4 Lesions are smooth surfaced, firm and dome shaped pearly papules
A central umbilication is characteristic Clinical pattern depends on the group affected When restricted to only the genital area in a child the possibility of sexual abuse must be considered Secondary infections may occur



7 Seen in % of AIDS pts Helper T-cell count of less than 100 Giant lesion may be confused with BCC Henderson-Patterson bodies – basophilic inclusion bodies

8 treatment Topical tretinoin or imiquimod Extraction Light cryotherapy
Cantharadin Curettage podophyllotoxin

9 Human monkeypox Rare More than 90% of cases occur in children under 15
Fatality rate of 11% Disease is clinically similar to smallpox Fever followed by vesiculopustular eruption Develop following contact with wildlife sources

10 Human to human transmission may occur

11 Picornavirus group RNA
Only coxsackieviruses, the echoviruses, and enterovirus type 71 are significant causes of skin disease

12 Enterovirus infections
Person to person transmission occurs by the intestinal-oral route and less commonly the oral route Usually the diagnosis is by clinical characteristics


14 herpangina Disease of children worldwide Coxsackievirus and echovirus
Acute onset of fever, ha, sore throat, dysphagia, anorexia, and sometimes a stiff neck Yellowish white, vesicles in the throat, surrounded by an intense areola Most frequently on the anterior faucial pillars, tonsils, uvula, or soft palate

15 Lesions coalesce and ulcerate leaving a shallow crater
Lesions disappear in 5-10 days Treatment is supportive Topical anesthetics or allopurinol mouthwash

16 Hand-Foot-and-Mouth Disease
Infection begins with a fever and sore mouth 90% have oral involvement Lesions are small rapidly ulcerating vesicles surrounded by a red areola Buccal mucosa, tongue, soft palate, and gingiva Lesions on hands and feet Red papules that quickly turn to gray vesicles With a red halo



19 Typically lasts less than a week
Treatment is again supportive Topical anesthetics Coxsackievirus A-16 Distribution and presence of skin lesions differentiates this from herpangina

20 Boston Exanthem Disease
Occurred as an epidemic in Boston Caused by echovirus 16 Consisted of sparsely scattered pale red macules and papules Chiefly on the face chest and back Now an uncommon cause of viral exanthems

21 Eruptive pseudoangiomatosis
Young children during or immediately following a viral illness develop red papules that resemble angiomas Face trunk and extremities Resolve spontaneously within 10 days Echoviruses 25 and 32 have been implicated

22 PARAMYXOVIRUS GROUP RNA viruses Measles Rubella


24 Measles (rubeola, morbilli)
Worldwide disease Commonly affects children under age of 15 months Respiratory spread with an incubation of 9-12 days Immunizations are highly effective Prodrome- fever, malaise, conjunctivitis and prominent upper respiratory symptoms

25 A macular or maculopapular eruption appears after 1-7 days
Anterior scalp line and behind the ears Quickly spreads over the face and involves the entire body by day 3 Purpura may be present Koplik’s spots are pathognomonic, appear during the prodrome

26 Erythematous lesions of the measles exanthem

27 Pink macules with minimally elevated papules with confluence

28 Koplik’s Spots cluster of tiny bluish white papules with an erythematous areola on buccal mucosa opposite premolar teeth

29 complications OM Pneumonia Encephalitis Thrombocytopenic purpura
Infection in pregnant patients is associated with fetal death

30 DX course and prognosis
Clinical- high fever, Koplik’s spots, conjunctivitis, upper respiratory symptoms, rash course and prognosis maximum intensity of rash reached in 3 days rash fades 5-10 days self limited death 1 in 3000 chronic complication, subacute sclerosing panencephalitis

31 RUBEOLA management Acute vaccine Vitamin A
decreases morbidity and mortality given to severe measles even if no nutritional deficit is suspected vaccine MMR given at months, and 4-6 years

32 measles

33 Rubella German measles, 3-day measles benign contagious viral disease
etiology Togavirus transmission inhalation of aerosolized respiratory droplets incubation 12-23 days Vaccination gives lifelong immunity

34 RUBELLA clinical manifestations
Prodrome- 1-5 days mild symptoms of malaise, headache, sore throat, eye pain, and moderate temperature elevation Pain on lateral and upward eye movement is characteristic precedes eruption by a few hours to a day children are usually asymptomatic

35 RUBELLA clinical manifestations
Eruptive phase begins on neck or face spreads to trunk and extremities in hours lesions are pinpoint to 1 cm, round or oval, pinkish or rosy red, macules or maculopapules (purplish lesions of measles and fine punctate yellow-red lesions of scarlet fever) discrete, grouped or coalesced arthritis of phalangeal joints may be seen in women

36 RUBELLA Diagnosis course and prognosis prevention
Clinical, posterior cervical, suboccipital, and postauricular lymphadenitis occurs in more than half can be confirmed with serology course and prognosis typically mild, requiring only symptomatic treatment lesions last hours, followed by desquamation prevention MMR given at months, and 4-6 years

37 rubella

38 RUBELLA Forchheimer Spots red palatal lesions start with onset of rash

39 Congenital Rubella Syndrome
Infants born to mothers who have had rubella during the first trimester of pregnancy transplacental transmission as high as 80% in the first trimester Typical anomalies include IUGR, deafness, mental retardation, cataracts, retinopathy, cardiac defects, and “blueberry muffin” rash. Prior to pregnancy antibody titer should be verified. Immunization is contraindicated in pregnancy.

40 Asymmetric Periflexural Exanthem of Childhood (APEC)
AKA unilateral laterothoracic exanthem Children 8 mo to 10 yrs Cause is unknown Viral origin has been proposed Symptoms of mild upper respiratory or gastrointestinal infection usually precede the eruption


42 Erythematous macules and papules involving the axilla, lateral trunk and flank.
In this patient the exanthem progressed to bilateral distribution but maintained left-sided predominance

43 Erythematous papules coalesce to form poorly marginated morbilliform plaques
Mild pruritis Lesions begin unilaterally, close to a flexural area, usually the axilla Centrifugal spread to adjacent trunk and extremity The contralateral side is involved in 70% of cases, asymmetrical nature is maintained

44 Lymphadenopathy is seen in 70%
Last 2-6 weeks on average Resolves spontaneously Topical steroids or oral antibiotic are of no benefit Oral antihistamines


46 Erythema Infectiosum (Fifth Disease)
Worldwide benign infectious exanthem Parvovirus B19 Spread by respiratory droplets Viral shedding has stopped by the time the exanthem has appeared Incubation 4-14 days prodrome pruritus, low-grade fever, sore throat, malaise seen in 10% of cases



49 Three distinct overlapping stages
facial erythema. Red papules on the cheeks that rapidly coalesce. Resembles erysipelas. “slapped cheek.” net pattern erythema. Fishnet like pattern, begins on extremities then extends to trunk recurrent phase. Eruption may reappear following emotional upset or sunlight exposure over next 2-3 weeks.

50 Lacy, reticulated skin eruption over the arm during the second stage of the exanthem

51 Papular Purpuric Stocking and Glove Syndrome
Occurs in teenagers and young adults Pruritis, edema, and erythema of the hands and feet, and a fever is present Lesions are sharply cut off at the wrists and ankles Mild erythema of the cheeks, elbows, knees and groin Syndrome resolves within 2 weeks


53 Erythematous patches with petechiae on the palms

54 Serovonversion for parvovirus B19 has been found
Complications are uncommon and age dependent Arthritis and arthralgias occur in 60% of adult women Aplastic crises may result in the sickle cell pt In primarily infected pregnant women, fetal death can result from hydrops fetalis as a result of intrauterine anemia, esp. first 20 weeks

55 ARBOVIRUS GROUP Comprise the numerous arthropod-borne RNA viruses

56 West Nile Fever A maculopapular eruption accompanied by lymphadenopathy and fever characterize this disease The Culex mosquito is the vector Disease seen in the Middle East

57 Sandfly Fever AKA phlebotomus fever and pappataci fever
Small pruritic papules appear after the bite of a sandfly Fever, ha, malaise, nausea, conjunctival injection, stiff neck, and abdominal pains suddenly develop Recovery is slow, with recurring bouts of fever No specific treatment is available

58 Dengue (break-bone fever)
A common disease of tropical regions throughout the world Spread by Aedes aegypti mosquito Disease begins with a sudden high fever, ha, back ache, retroorbital pain, bone and joint pain, weakness, depression and malaise A scarlatiniform or morbilliform exanthem, especially on the thorax and joint flexors may be seen Patient may recover fully at this stage

59 In 1-7% of cases dengue hemorrhagic fever develops, bleeding, thrombocytopenia, and hemoconcentration develop Mortality 1-15%

60 Alphavirus Sindbis virus infection Seen in Finland
Transmitted by the mosquito Multiple erythematous papules with a surrounding halo associated with a fever and prominent arthralgias Symptoms resolve over a few weeks

61 PAPOVAVIRUS GROUP DS, DNA viruses Slow growing
Replicate within the nucleus

62 Verruca Human papillomaviruses include more than 80 types
Most types cause specific types of warts and favor certain anatomic locations Infections are described as clinical, subclinical and latent


64 Verruca vulgaris Commonly HPV 2 5% prevalence in children
Frequent emersion of hands in water is a risk factor Natural history is for spontaneous resolution, half by 1 year and two thirds by 2 years Usually located on the hands Present as elevated, rough, grayish papules


66 Verruca vulgaris. Note the characteristic features of ‘church spire’ papillomatosis heaped with ortho- and parakeratosis, acanthosis and koilocytosis.

67 Diagnostic clue- warts do not have dermatoglyphics
Occur anywhere on skin Spread by autoinnoculation Digitate or filiform warts on the face and scalp

68 Verruca plana HPV 3 Children and young adults
Flat-topped papules that are slightly erythematous or brown Generally multiple and grouped Face, neck, dorsa of hands, wrists and knees Men who shave and women who shave their legs Koebnerization Highest rate of spontaneous remission


70 Verruca plantaris HPV type 1
Appear at pressure points on the ball of the foot Frequently several lesions are seen Mosaic wart May be confused with callous, no black dots Myrmecia type- occurs as smooth surfaced, deep, often inflamed and tender papules or plaques- may be confused with mucinous cyst

71 Myrmecial wart

72 Verrucae plantares Photo after the shaving of the hyperkeratotic surface

73 HPV-60 Ridged wart Persistence of dermatoglyphics
This type also causes plantar verrucous cysts

74 treatment Depends on the type of wart and the age of the patient
Allow 2-3 months of therapy Do not abandon any treatment too quickly

75 TX-flat warts Frequently undergo spontaneous remission Cryotherapy
Topical salicylic acid preparations topical tretinoin 5-FU anthralin

76 TX-common warts Two basic approaches
Destruction and Induction of local immune reactions Cryotherapy, salicylic acid preparations, canthrone, bleomycin, surgical ablation, laser, high dose cimetidine, heat treatment, isotretinoin, hypnotic suggestion, DNCB

77 TX-plantar warts Salicylic acid preparations Cryotherapy Cantharadin
Bleomycin, laser, and DNCB

78 Genital warts The most common sexually transmitted disease
Lifetime risk in sexually active young adults may be as high as 80% A large portion of genital HPV is either subclinical or latent Infection is closely linked with cancer of the cervix, glans penis, anus, vulvovaginal area, and periungal skin Transition zones of cervix and anus


80 Numerous HPV types are associated with genital warts
Those producing benign lesions- low risk Most common are HPV-6 and HPV-11 Those associated with cancer- high risk or oncogenic type most common HPV-16 and HPV-18 Virtually all condylomata are caused by types –6 and –11

81 Condylomata acuminata
Appear as lobulated papules that are frequently multifocal Intraurethral condylomata may present with terminal hematuria, altered urinary stream, or urethral bleeding Numerous genital warts may appear during pregnancy Other sexually transmitted disease may be present

82 Bowenoid papulosis and HPV-induced genital dysplasias
Characterized by flat, often hyperpigmented papules Singly or in multiples HPV-16may behave similar to other genital warts May progress to invasive SCC

83 Bowenoid papulosis of the anus positive for high-risk HPV in a homosexual male

84 Erythroplasia of Queyrat
Erythroplasia of Queyrat. A well demarcated velvety plaque of the prepuce positive for high-risk HPV

85 Giant condyloma acuminatum (Buschke-Löwenstein tumor)
A rare, aggressive wart-like growth that is a verrucous carcinoma HPV-6 Most often occurs on the glans penis or prepuce of an uncircumcised male May invade deeply, and uncommonly metastases Complete surgical excision

86 Buschke- Löwenstein Tumor
Cauliflower-like deeply infiltrating giant condyloma acuminata

87 Diagnosis of genital warts
Inspection Acetowhitening may help in the differentiation of certain genital papules Bowenoid papulosis may require Bx

88 Treatment of genital warts
Recurrence is frequent Not proven to reduce transmission to sexual partners nor to prevent progression to dysplasia or cancer Subclinical of the external genitalia should not be sought or treated Bleeding genital warts may increase the sexual transmission of HIV and hepatitis B and C

89 Treatment of genital warts
Podophyllin 4-8 hrs, weekly application Purified podophyllotoxin 0.5% sln Aldara, 3 alternate days per week TCA (safe in pregnancy) Cryotherapy (also safe in pregnancy) Electrofulgeration or electrocauterization CO2 laser

90 5-FU 5% cream, esp. bowenoid papulosis
Any surgical method that generates a smoke plume is potentially infectious to the surgeon 5-FU 5% cream, esp. bowenoid papulosis Systemic and intralesional interferon alfa CDC no longer recommends

91 Genital warts in children
Children can acquire genital warts through vertical transmission perinatally, digital inoculation or autoinoculation, fomite or social nonsexual contact, or through sexual abuse HPV typing has demonstrated that most warts in the genital area of children are “genital” HPV type And most children with them have family members with them as well


93 Finding of a nongenital type does not exclude abuse
The risk for sexual abuse is highest for children older than 3 yrs of age Case-by-case management Should screen for other STDs Podophyllotoxin, imiquimod, light cryotherapy

94 Recurrent respiratory (laryngeal) papillomatosis
HPV associated papillomas may occur throughout the respiratory tract, from the nose to the lungs Bimodal distribution- children under 5 and after 15 Affected young children were born to mothers with genital condylomata and present with hoarseness HPV-6 HPV-11 Carcinoma that is often fatal develops in 14%

95 Heck’s disease Linked to HPV-13 AKA focal epithelia hyperplasia
Small white to pinkish papules occur diffusely in the oral cavity

96 Epidermodysplasia verruciformis
A rare inherited disorder characterized by widespread HPV infection and cutaneous SCCs Most commonly inherited as and AR trait HPV-3, HPV-10 and many other “unique” types Pathogenesis is unknown Presents in childhood and continues throughout life


98 Skin lesions include flat, wartlike lesions of the dorsal hands, extremities, and face
SCCs develop in 30-60% of pts, most often on sun exposed areas,-5,-8,-47 Actinic background Surgery, radiation is contraindicated Strict sun avoidance


100 Warts in immunosuppressed patients
Predisposing conditions include organ transplantation, immunosuppressive medication, congenital immunodeficiency diseases, lymphoma and HIV infection By 5 yrs posttransplant 90% of pts have warts Regular dermatologic examinations Standard methods of treatment, efficacy is reduced

101 RETROVIRUSES Contain RNA which is converted by a virally coded reverse transcriptase to DNA in the host cell The target cell population is primarily CD4+ lymphocytes Transmission by sexual intercourse, blood products/intravenous drug use, and from mother to child during childbirth or breastfeeding

102 HTLV-1 Endemic in Japan, subSaharan Africa and southeastern US
Responsible for several clinical syndromes 1% will develop adult T-cell leukemia-lymphoma Four forms: smoldering, chronic, acute, and lymphomatous, usually progressing in that order Skin lesions in ATLL include erythematous papules or nodules

103 Infected patients may develop various forms of dermatitis mimicking other skin diseases
Infective dermatitis, children present with a chronic eczema of the scalp, axilla, groin, external auditory canal, retroauricular area, eyelid margins, paranasal areas and neck Chronic nasal discharge Cultures positive for S. aureus

104 Human Immunodeficiency Virus (HIV, HTLV III)
Cutaneous manifestations are prominent Affecting up to 90% of HIV-infected persons Many have multiple skin lesions of different types Skin lesions can be classified into three broad categories: infections, inflammatory dermatoses, and neoplasms Skin lesions tend to appear at a specific stage of disease, making them useful markers

105 Seborrheic dermatitis , pruritis ani, psoriasis, Reiter’s syndrome, atopic dermatitis, herpes zoster, acne rosacea, oral hairy leukoplakia, onychomycosis, warts, recurrent S. aureus folliculitis and mucocutaneous candidiasis- helper T-cell counts

106 With counts < 200, pt defined as AIDS
Opportunistic infections: chronic herpes simplex, MC, bacillary angiomatosis, systemic fungal infections and mycobacterial infections Hyperreactive skin is also seen: eosinophilic folliculitis, GA, drug reactions, photodermatitis

107 Eosinophilic folliculitis (right)
Bacillary angiomatosis (below)

108 T-cell count < 50 = advanced AIDS
Unusual presentations of opportunistic infection Treatment is difficult Combination cocktails, (HAART), highly active antiretroviral therapy About half of HIV patients respond Opportunistic infections no longer occur and mortality decreases Eosinophilic folliculitis and drug eruptions may become more frequent and severe

109 Primary HIV infection (Acute seroconversion syndrome)
An acute illness develops several weeks after infection Clinical syndrome resembles Ebstein-Barr infection Fever, sore throat, cervical adenopathy, rash, and oral and genital and rectal ulceration Dysphagia may be prominent

110 Oral candidiasis or Pneumocystis carinii may develop
Suspect DX in at risk individuals Direct measurement if HIV load will confirm Prompt combination antiviral therapy

111 HIV-Associated pruritis
Not caused by HIV disease itself but related to its associated inflammatory dermatoses “papular pruritic eruption”- a wastebasket diagnosis Follicular eruptions are more common Eosinophilic folliculitis is the most common pruritic follicular eruption, helper T-cell <200 Urticarial follicular papules on the upper trunk, face, scalp, and neck 90% of lesions occur above the nipple line

112 Disease wanes and wanes and may spontaneously clear, only to flare unpredictably
Peripheral eosinophilia may be present Topical steroids and antihistamines Phototherapy or itraconazole isotretinoin

113 HIV-Associated Neoplasia
Kaposi’s sarcoma Superficial BCC SCC Genital HPV-induced SCC Extranodal B-cell and T-cell lymphoma BCC’s behave in the same manner, receive standard management

114 SCC’s, standard management, excision is recommended
SCC in sun-exposed skin can be very aggressive Genital SCC, associated with “high-risk” HPV types (-16, -18)

115 Extranodal B-cell and T-cell lymphoma
Associated with advanced immunosuppression of AIDS Present as violaceous or plum-colored papules, nodules or tumors MF can also be seen in patients with HIV infection

116 Melanoma Occasionally seen in HIV patients Prognosis is unknown
It has been suggested that the risk of metastasis is increased

117 AIDS and Kaposi’s Sarcoma
HHV-8 Patients with AIDS present with symmetrical widespread lesions, that are often numerous Any mucocutaneous surface may be involved Favors hard palate, trunk, penis, lower legs and soles DX by biopsy

118 Red-violet papules on the palate in addition to oral candidiasis

119 Treatment depends on the extent and aggressiveness of the disease
Effective HAART after about 6 months is associated with involution of KS lesions Initial treatment for fewer than 50 lesions Intralesional vinblastine Cryotherapy Irradiation therapy

120 Systemic therapy in aggressive disease
Interferon alfa Vinca alkaloids Bleomycin Liposomal doxyrubicin

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