Prof Dr Meral Sönmezoğlu Yeditepe University Hospital

Prof Dr Meral Sönmezoğlu Yeditepe University Hospital
VIRAL EXANTHEMS Prof Dr Meral Sönmezoğlu Yeditepe University Hospital

Learning Objectives List the causative agent,
Know epidemiology, pathogenesis, and pathology, clinical features, complications, diagnosisi and management of; Measles Rubella Parvovirus B19 Varicella zoster Human Herpes Viruses

The Structure of Human Skin
Perspiration and sebum contain nutrients Salt inhibits microbes Lysozyme hydrolyzes peptidoglycan Fatty acids inhibit some pathogens Figure 21.1

Microbial Diseases of the Skin
Exanthem: Skin rash arising from another focus of the infection Enanthem: Mucous membrane rash arising from another focus of the infection

Skin Lesions Figure 21.2

VIRAL SKIN INFECTIONS Several common childhood viral infections;
Rubeola (Measles) Rubella (German measles) Varicella (Chickenpox) Erythema infectiosum (fifth disease) Erythema subitum (roseola) Echovirus-adenovirus

OTHER VIRAL SYNDROMES Pityriasis rosea (HHV 6,7?)
Hand, foot and mouth disease Gianotti Crosti syndrome Haemorragic fevers Smallpox HIV infections Rickettsial diseases

LOCAL SKIN VIRAL INFECTIONS
Herpes simplex Herpes zoster Vesicular stomatitis Molloscum contagiosum Viral warts

CLIN. MAN. OF VIRAL INFECTIONS
Erythema multiforme Erythema nodosum Kawasaki disease

Measles (Rubeola) Measles virus Transmitted by respiratory route
Macular rash and Koplik's spots Prevented by vaccination Figure 21.14

Measles (Rubeola) Encephalitis in 1 in 1,000 cases
Subacute sclerosing panencephalitis in 1 in 1,000,000 cases

Reported U.S. Cases of Measles, 1960–2007
Clinical Focus, p. 505

Cases of Measles in Turkey

MEASLES Measles, also known as rubeola, is a disease caused by a virus, a member of the family paramyxoviridae, genus Morbillivirus Measles is spread through respiration (contact with fluids from an infected person's nose and mouth, either directly or through aerosol transmission), and is highly contagious—90% of people without immunity sharing a house with an infected person will catch it.

MEASLES The incubation period usually lasts for 7–14 days (during which there are no symptoms). Infected people remain contagious from the appearance of the first symptoms until 3–5 days after the rash appears.

MEASLES The wide dissemination of measles virus due to viremia, with associated infection of endothelial, epithelial, monocyte, and macrophage cells, may explain the variety of clinical manifestations and complications that can occur with measles infection. A second viremia occurs several days after the first, coinciding with the appearance of symptoms which signals the beginning of the prodromal phase

MEASLES Koplik's spots pathognomonic for measles infection and occur approximately 48 hours before the characteristic measles exanthem The characteristic rash is maculopapular and blanches, beginning on the face and spreading centrifugally to involve the neck, upper trunk, lower trunk and extremities. The lesions may become confluent, especially in areas such as the face where the rash develops first The palms and soles are rarely involved.

MEASLES

Rubellavirus (Togaviridae; Rubivirus)

Rubella (German Measles)
Rubella virus Macular rash and fever Congenital rubella syndrome causes severe fetal damage Prevented by vaccination Figure 21.15

RUBELLA Rubella (also known as epidemic roseola, German measles, liberty measles or three-day measles) is a disease caused by the Rubella virus. It is often mild and an attack can pass unnoticed. However, this can make the virus difficult to diagnose. The virus usually enters the body through the nose or throat. The disease can last 1-5 days. Children recover more quickly than adults. It is passed from person to person by tiny droplets in the air that are breathed out.

RUBELLA Rubella can pose a serious risk as it can also be transmitted from a mother to her developing baby through the bloodstream via the placenta. If the mother is infected within the first 20 weeks of pregnancy, the child may be born with congenital rubella syndrome, which includes a range of birth defects. Incubation period of days The name German measles has nothing to do with Germany. It comes from the Latin germanus, meaning "similar", since rubella and measles share many symptoms.

CONGENITAL RUBELLA

HERPES VIRUS TYPES THAT INFECT HUMANS
Herpes simplex virus Type 1 (HSV-1) Herpes simplex virus Type 2 (HSV-2) Epstein Barr virus (EBV) Cytomegalovirus (CMV) Varicella Zoster Virus (VZV) Human herpes virus 6 (exanthum subitum or roseola infantum) Human herpes virus 8 (Kaposi's sarcoma-associate herpes virus)

HERPES VIRUSES Leading viral infectious agent after influenza and common cold viruses After acute infection they may remain in the body and be reactivated.

Double Stranded DNA Virus

Herpes simplex Virus (HSV)
There are two types, HSV-1 and HSV-2 with very similar characteristics

Tzanck satin of herpes vesicle

Herpes Simplex Human herpesvirus 1 (HSV-1) and 2 (HSV-2)
Cold sores or fever blisters (vesicles on lips) Herpes gladiatorum (vesicles on skin) Herpetic whitlow (vesicles on fingers) Herpes encephalitis HSV-1 can remain latent in trigeminal nerve ganglia

Cold Sores Caused by Herpes Simplex Virus
Figure 21.12

HSV-1 in the Trigeminal Nerve Ganglion
Figure 21.13

Herpes Simplex HSV-2 can remain latent in sacral nerve ganglia
HSV-2 encephalitis: 70% fatality Encephalitis treatment: Acyclovir

Genital Infections with HSV2

VARICELLA (Herpes Zoster Virus, Human Herpes Virus-3)
This virus causes two major diseases, Chicken-pox (Varicella), usually in childhood, and Shingles, later in life. Shingles (Zoster) is a reactivation of an earlier varicella infection.

Chickenpox Varicella-zoster virus (human herpesvirus 3)
Transmitted by the respiratory route Causes pus-filled vesicles Virus may remain latent in dorsal root ganglia Prevention: Live attenuated vaccine Breakthrough varicella in vaccinated people

Figure 21.11a

Shingles Reactivation of latent HHV-3 releases viruses that move along peripheral nerves to skin Postherpetic neuralgia Prevention: Live attenuated vaccine Acyclovir may lessen symptoms

Figure 21.11b

Reactivation of VZV

VARICELLA Incubation period is about 2 weeks (10-23 dys)
Spreading of the disease in the respiratory tract (by a cough) or from contact with ruptured papulae on the skin containing infectious virus. Contagious period starts at about days after the initial infection.

VARICELLA During the day prodromal stage, the virus in the respiratory mucosa infects macrophages and pneumocytes. At this stage, there are no symptoms. The virus spreads from the lungs to lymphocytes and monocytes and to the reticulo-endothelial system. Here, at about 5 days, a second viremia occurs and the virus travels to the skin, mouth, conjunctiva, respiratory tract and, indeed, to epithelial sites throughout the body.

VARICELLA The virus leaves the blood vessels and first infects sub-epithelial sites and then epithelial sites forming papulae containing multinucleated cells with intracellular inclusions. The virus reaches the surface and is shed to the exterior of the respiratory tract about days after the initial infection. It takes a little longer (a few days) for the virus to reach the surface of the skin when the characteristic papulae (rash) appear. Patient have a fever for a few days (up to 39°C).

Skin Lesions Figure 21.2

VARICELLA

Chicken Pox: Lesions at different stages simultaneously

Very contagious!

Varicella during pregnancy

Shingles: Seen on a dermatome
The skin lesions are somewhat different from those in chicken pox, being restricted to small areas of the skin, usually in the thorax, in an area where a nerve inervates the skin (dermatome). They are small and close together. They are maculopapular with an erythematous base and usually heal in about two weeks.

FIFTH DISEASE Name derived from a 1905 list of skin rashes, which included 1. Measles 2. Scarlet fever 3. Rubella 4. Filatov Dukes disease (mild scarlet fever), and 5. Fifth disease, or erythema infectiosum Human parvovirus B19 produces mild flu-like symptoms and facial rash

FIFTH DISEASE (ERYTHEMA INFECTIOSUM)
Especially common in children (5 -15 yrs) Caused by Parvovirus B19 %30 asymptomatic Fifth disease typically produces a distinctive red rash on the face (slapped cheek) The rash then spreads to the trunk, arms, and legs.

ERYTHEMA INFECTIOSUM Glove and stocking rash
Generally not a serious condition Occurs everywhere in the world. Outbreaks tend to happen in the late winter and early spring, may also be sporadic cases throughout the year.

FIFTH DISEASE

HHV6 and 7: Roseola Infantum Sixth Disease
Roseola (also known as sixth disease, exanthem subitum, and roseola infantum) is a viral illness in young children, most commonly affecting those between the ages of 6 months and 2 years. It is typically marked by several days of high fever, followed by a distinctive rash just as the fever breaks. Two common and closely related viruses can cause roseola: human herpesvirus (HHV) type 6 and possibly type 7.

Roseola Caused by human herpesvirus 6 (HHV-6) and 7 (HHV-7)
High fever and rash lasting for 1–2 days

Roseola Infantum

HHV8 causes Kaposi’s sarcoma
Kaposi's sarcoma is a cancer that causes patches of abnormal tissue to grow under the skin, in the lining of the mouth, nose, and throat or in other organs. The patches are usually red or purple and are made of cancer cells and blood cells. The red and purples patches often cause no symptoms, though they may be painful. If the cancer spreads to the digestive tract or lungs, bleeding can result. Lung tumors can make breathing hard.

Kaposi’s sarcoma Before the AIDS epidemic, KS usually developed slowly. In AIDS patients, though, the disease moves quickly. Treatment depends on where the lesions are and how bad they are. Treatment for the AIDS virus itself can shrink the lesions. However, treating KS does not improve survival from AIDS itself. KS is caused by a herpes virus called Human Herpes Virus 8 (HHV-8). In a recent study, men with HHV-8 were nearly 12 times more likely to be diagnosed with KS than men who did not have HHV-8

Kaposi’s Sarcoma

Papillomavirus Human Papillomavirus
HPV is currently the most important papovavirus. Seventy strains of Human Papillomavirus have been identified so far. These viruses are known for their role in causing warts (both common warts and genital warts) as well as their association with cancer. Most people are infected with some strain of HPV in their lives.

Warts Papillomaviruses Treatment Removal
Cryotherapy Electrodesiccation Salicylic acid Imiquimod (stimulates interferon production) Bleomycin

Skin and Genital Warts

Hand-foot-mouth disease
Coxsackievirus A type 16 (CVA16) is the etiologic agent involved in most cases of HFMD, but the illness is also associated with coxsackievirus A5, A7, A9, A10, B2, and B5 strains. Enterovirus 71 (EV-71) has caused outbreaks of HFMD. Sore mouth or throat Malaise Rarely, vomiting occurs in HFMD cases caused by EV-71 Initially, macular lesions appear on the buccal mucosa, tongue, and/or hard palate Lesions may also be found on the hands, feet, buttocks, and genitalia A fever of 38-39°C may be present for hours

TUS 2012 Aşağıdaki uygulamalardan hangisi sağlıkta “primer koruma” kapsamında yer alır? A) Kızamık aşısı B) Bronkoskopi C) Cerrahi eksplorasyon D) Papsmear incili E) ELISA testi

TUS 2012 Kızamıkta ölüme en sık yol açan komplikasyon aşağıdakilerden hangisidir? A) Otitis media B) Pnömoni C) Subakut sklerozan panensefalit D) Sinüzit E) Miyokardit

TUS 2012 Otolojik muayenesinde dış kulak yolunda veziküler lezyonlar saptanan bu hasta için en olası tanı aşağıdakilerden hangisidir? A) Herpes zoster otikus B) Fronkülozis C) Nekrotizan otitis ekstema D) Büllözeksternal otitis E) Granüler eksternal otitis

TUS 2012 Üç gün süren yüksek ateşin düşmesinden sonra vücudunda tek tek makülopapüler döküntüler beliren, bir yaşındaki süt çocuğunda aşağıdaki hastalıklardan hangisi düşünülmelidir? A) Kızamık B) Eritema infeksiyozum C) Kızıl D) Suçiçeği E) Roseola infantum

TUS 2010 Subakut sklerozan panensefalit aşağıdaki enfeksiyonlardan hangisinin komplikasyonudur? A) Kızamık B) Kızamıkçık C) Herpes simpleks virusu tip 1 D) Sitomegalovirus E) Herpes simpleks virusu tip 2

TUS 2010 Suçiçeğinin en sık görülen komplikasyonu aşağıdakilerden hangisidir? A) Serebellar ataksi B) Miyokardit C) Pnömoni D) Nefrotik sendrom E) Pankreatit

Bacterial Infection The most common complication of chickenpox is secondary bacterial infection of the chickenpox lesions. The bacteria most likely to cause infection are Staphylococcus aureus and Streptococcus pyogenes. Neurologic Complications The second most common complication of chickenpox involves the neurological system. One of these disorders is called acute cerebellar ataxia which causes progressive irritability, difficulty walking, difficulty with vision, and speech disturbances that persist for days or weeks but normally clear completely over time.

TUS 2012 Aşağıdaki konjenital enfeksiyonların hangisinde mikrosefali görülmesi beklenmez? A) Sitomegalovirus B) Herpes simpleks virus C) Rubella D) Toksoplazmozis E) Kabakulak

TUS 2013 EBV VCA IgM (-) EBV VCA IgG (+) EBNA (+) olan hastanın durumu için aşağıdakilerden hangisi doğrudur? a. Kronik aktif enfeksiyon b. Taşıyıcı c. Geçirilmiş enfeksiyon d. Aşılanmış e. ?

TUS 2013 Çocuk hasta iki gün önce döküntü bir gün sonra oksipital lap, ateşi yüksek, döküntü makulopapüler tarzda, basmakla soluyor, boyunda başlıyor gövdeye yayılıyor tanı için ne istenir a- Rubella IgM b- Rubella IgG c- CMV IgM d- Rubeola IgM e- Rubeola IgG

TUS 2013 Daha önce suçiçeği aşısı yapılmamış 5 yaşındaki sağlıklı bir çocuk, suçiçeği geçiren bir çocukla temastan 3 gün sonra hastaneye başvuruyor. Bu çocukta suçiçeği enfeksiyonuna önlem olarak aşağıdakilerden hangisi yapılmalıdır? A) Varisella-zoster immünoglobulini B) Suçiçeği aşısı C) Standart immünoglobulin D) Oral asiklovir E) İntravenöz asiklovir

TUS 2013 On dört aylık kız hasta, 3 gün devam eden yüksek ateşin düşmesinden sonra ortaya çıkan makülopapüler döküntü, iştahsızlık ve hâlsizlik yakınmalarıyla getiriliyor. Öyküsünden döküntülerin gövdesinden başladığı sonrasında boyun, yüz, üst ve alt ekstremitelere yayıldığı öğreniliyor. Bu hastada, aşağıdaki mikroorganizmalardan hangisi düşünülmelidir? A) Sitomegalovirus B) Herpes simpleks virus C) İnsan Herpes virus tip 6 D) Epstein-Barr virus E) Enterovirus

TUS 2014 Kızamık komplikasyonu olmayan? Ensefalit Otit Menenjit
Trakeit Nefrit

Complications associated with measles by organ system.
Orenstein W A et al. J Infect Dis. 2004;189:S4-S16 © 2004 by the Infectious Diseases Society of America

TUS 2014 B lenfositte latent kalan virüs? VZV EBV CMV HSV

TUS 2015

QUESTIONS?

Prof Dr Meral Sönmezoğlu Yeditepe University Hospital

Benzer bir sunumlar

... konulu sunumlar: "Prof Dr Meral Sönmezoğlu Yeditepe University Hospital"— Sunum transkripti:

Benzer bir sunumlar

Proje hakkında

Geri bildirim

Giriş

Sosyal ağ üzerinden giriş yapmak:

Prof Dr Meral Sönmezoğlu Yeditepe University Hospital

Benzer bir sunumlar

... konulu sunumlar: "Prof Dr Meral Sönmezoğlu Yeditepe University Hospital"— Sunum transkripti:

Benzer bir sunumlar

Proje hakkında

Geri bildirim