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99 Cards in this Set
- Front
- Back
what is the role of nurses in genetic counseling?
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-some nurses play a key role in the identification of families in need of genetic counseling
-make referrals to specialists in genetics -they can construct family pedigrees of 3 or more generations -clarify the genetics info that family members receive during counseling sessions or the internet |
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-the most important of all nursing functions is to provide what during all aspects of the counseling process (guilt and self blame are universal reactions)
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emotional support
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Homozygous vs Heterozygous
an individual having 2 copies of the same allele for a given trait |
Homozygous
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Homozygous vs Heterozygous
an individual with 2 different alleles |
Heterozygous
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dominant vs recessive
it is expressed or phenotypically apparent when only 1 copy of an allele associated with the trait is present |
dominant
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dominant vs recessive
expressed only when 2 copies of the alleles associated with the trait are present |
recessive
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heterozygous or homozygous
____________individuals have only 1 variant allele and are unaffected clinically because their normal gene overshadows the variant allele. |
heterozygous
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-heterozygous individuals have only 1 variant allele and are unaffected clinically because their normal gene overshadows the variant allele. they are also known as ________of the recessive trait.
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carriers
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Autosomal recessive inheritance disorders
–are those in which both genes of a pair are forms associated with |
the disorder to be expressed
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Autosomal recessive inheritance disorders
-for the trait to be expressed, __ carries must each contribute a variant allele to the offspring |
2
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Autosomal recessive inheritance disorders have a horizontal or verticle pattern of inheritence?
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a horizontal pattern of inheritance, rather than the vertical pattern seen with Autosomal dominant disorders
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Autosomal recessive inheritance disorders are usually observed in how many or more siblings?
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1 or more siblings
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-most recessive disorders tend to have severe clinical manifestations and what else?
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affected offspring may not reproduce
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-what are examples of of Autosomal recessive inherited disorders
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PKU, galactosemia, Tay-sachs disease, sickle cell anemia
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Interpretation of risk
-guiding principle for genetic counsels is the principle of nondirectiveness, which states what? |
the individual who is providing genetic counseling respects the right of the individual or family being counseled to make autonomous decisions
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Interpretation of risk
-nurses avoid making recommendations -try to communicate genetic information in an unbiased manner what is the -first step in providing nondirective counseling? |
becoming aware of ones own values and beliefs and then realizing how ones values and beliefs can influence or interfere with the communication of genetic information
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Interpretation of risk
-they should be given the facts and possible consequences, as well as all of the assistance they need in problem solving but the final decision regarding a course of action must be |
their own
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Estimation of Risk
-if a couple has not yet had children, but they are known to be at risk for having children with a genetic disease, they will be given an ________ risk |
occurrence
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Estimation of Risk
-once the mating of a couple has produced one or more children with a genetic disease, the couple will be given a _________risk |
recurrence
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Estimation of Risk
-in an Autosomal dominant disorder, both the occurrence and recurrence risk is 50% when |
1 parent is affected and the other is not
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Estimation of Risk
-the recurrence risk for Autosomal recessive disorders is what if both parents are carriers (they each have one recessive disease gene and one normal gene) |
25%
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an empiric risk is based not on what??
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not on genetic theory but rather on experience and observation of the disorder in other families
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-an important concept to be emphasized to individuals and families during a genetic counseling session is that
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“each pregnancy is an independent event”
- for ex: in monogenic disorders in which the risk remains the same no matter how many affected children are already in the family |
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STIs
-which 4 are bacteria? |
-chlamydia
-gonorrhea -syphilis -step B streptococcus |
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STIs
-what are some examples of virus (6) |
-HIV
-HPV(human papillomavirus) -herpes simplex 1 and 2 -cytomegalovirus -viral hepatitis A -viral hepatitis B |
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Homozygous vs Heterozygous
BB |
Homozygous
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Homozygous vs Heterozygous
individual having 2 copies of same gene for a given trait |
Homozygous
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Homozygous vs Heterozygous
Individual having 2 copies of different genes |
Heterozygous
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Homozygous vs Heterozygous
Bb |
Heterozygous
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Dominant vs Recessive
-phenotypically apparent with only one gene |
Dominant
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Dominant vs Recessive
-expressed only when 2 copies of gene are present |
Recessive
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Abnormalities of chromosome number
-most common? |
down syndrome / trisomny 21
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Autosomal recessive inheritance For trait to be expressed what must happen
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both parents must contribute (carrier)
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what is the most cost-effective piece of genetic information?
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family history
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what is the most common and fastest spreading STI in American women
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Chlamydia
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-infections are often silent and highly destructive
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Chlamydia
-symptoms are nonspecific and the organisms is expensive to culture |
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-if untreated, infections often leads to pelvic inflammatory disease
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Chlamydia
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infection in the cervix can cause an increase risk for acquiring HIV
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Chlamydia
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-more than half of infants born to mothers with ________will develop conjunctivitis or pneumonia after perinatal exposure to the mothers’ infected cervix
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Chlamydia
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-oldest communicable disease in the US
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Gonorrhea
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-transmitted by sexual contact (mostly genital to genital, but can be oral to genital or anal to genital)
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Gonorrhea
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-in females, it may spread from vagina to rectum
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Gonorrhea
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-can be transmitted to the newborn in the form of ophthalmia neonatorum during birth by direct contact with conococcal organisms in the cervix
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Gonorrhea
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-age is the most important risk factor (young sexual active teenagers, young adults, African Americans)
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Gonorrhea
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-women are often asymptomatic but women may have a purulent discharge but discharge is usually minimal or absent
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Gonorrhea
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-menstrual irregularities may be the presenting symptoms or women may complain of pelvic pain, abdominal pain, or longer and more painful menses
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Gonorrhea
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-rectal itching, fullness, pressure, pain, diarrhea are common symptoms
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Gonorrhea
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-perinatal complications include premature rupture of membranes, preterm birth, chorioamnionitis, neonatal sepsis, intrauterine growth restriction, and maternal postpartum sepsis
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Gonorrhea
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-ophthalmia neonatorum is the most common manifestation of neonatal infections and is highly contagious, if untreated may lead to blindness in the newborn
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Gonorrhea
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-also known as genital warts
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Human Papillomavirus (HPV)
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-most commonly seen viral STI
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Human Papillomavirus (HPV)
-HPV infection can be acquired by the neonate during birth |
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lesions are commonly found in the posterior part of the introitus, buttocks, vulva, vagina, anus, and cervix
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Human Papillomavirus (HPV)
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-infections of long duration may appear as a cauliflower like mass
-lesions are usually painless, but uncomfortable |
Human Papillomavirus (HPV)
-lesions may become so large during pregnancy that they affect urination, defecation, mobility, fetal descent (cesarean births may be performed when extensive growths are present but are rarely necessary and is not recommended even to prevent transmission of HPV infection to newborns) |
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-infections are thought to be more frequent in pregnant than nonpregnant women
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Human Papillomavirus (HPV)
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-infection results in painful recurrent genital ulcers and is caused by 2 different antigen substypes of herpes simplex virus (herpes simplex virus 1 and herpes simplex virus 2)
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Herpes Simplex Virus (HSV)
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-HSV-2 is usually transmitted
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sexually
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-HSV-1 is transmitted
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nonsexually
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-an initial HSV genital infection is characterized by multiple painful lesions, fever, chills, malaise and severe dysuria and may last how long
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2-3 weeks
-women with HSV recurrent infections commonly have only local symptoms that are usually less severe than those associated with the initial infection |
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-primary infections od Herpes Simplex Virus (HSV) during the first trimester have been associated with
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increased miscarriage rates
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-most severe complication of HSV infection is
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neonatal herpes
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-there is an association between cervical cancer and ?????
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HSV-2
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-acquired primarily through a fecal-oral route by ingestion of contaminated food, (esp milk, shellfish, polluted water, or person to person contact)
-can be transmitted during sexual activity |
Hepatitis A (HAV)
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-characterized by flulike symptoms with malaise, fatigue, anorexia, nausea, pruritus, fever, RUQ pain
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Hepatitis A (HAV)
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-serologic testing to detect IgM antibody is done to confirm acute infections
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Hepatitis A (HAV)
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-the IgM antibody is detectable 5-10 days after exposure and can remain positive for up to 6 months
-treatment is usually supportive |
Hepatitis A (HAV)
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-most threatening to the fetus and neonate
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Hep B
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-associated with 3 antigens and their antibodies
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Hepatitis B (HBV)
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-infection is a disease of the liver and is often a silent infection
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Hepatitis B (HBV)
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-symptoms of HBV are similar to hepatitis A: arthralgias, arthritis, lassitude, anorexia, nausea, vomiting, h/a, fever, milk abdominal pain
-later the women may have clay colored stools, dark urine, increased abdominal pain, and jaundice |
Hepatitis B (HBV)
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-most common bloodborne infection in the US
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Hepatitis C (HCV)
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Hepatitis C (HCV)
-the most common risk factor for pregnant women is: |
a history of injecting intravenous drugs
-other risk factors include STIs such as Hep B and HIV, multiple sex partners, history of blood transfusion |
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-most clients with ______ are asymptomatic or have general flulike symptoms
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Hepatitis C (HCV)
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-no vaccine available
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Hepatitis C (HCV)
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-most common type of vaginitis
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Bacterial Vaginosis (BV)
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-normal acidic pH of the vagina is altered
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Bacterial Vaginosis (BV)
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Bacterial Vaginosis (BV) is associated with what 2 pregnancy outcomes
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-associated with preterm labor and birth
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-may be considered normal vaginal flora in a women who is not pregnant
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GBS (Group B Streptococcus)
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-associated with neonatal morbidity and mortality usually from transmission from the birth canal of the infected mother to the infant during birth
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GBS (Group B Streptococcus)
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-risk factors for neonatal GBS infection include: positive prenatal culture for GBS in the current pregnancy, preterm birth of less than 37 wks of gestation, premature rupture of membranes for 18 hrs or more, intrapartum maternal fever higher than 38 degrees Celsius and a positive history for early onset neonatal GBS
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GBS (Group B Streptococcus)
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-to decrease the risk of neonatal GBS infection, it is recommended that all women be screened at 36 to37 weeks of gestation for GBS receive
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an IV antibiotic prophylaxis during labor
GBS (Group B Streptococcus) |
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-generally, all TORCH infections produce what kind of symptoms
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-generally, all TORCH infections produce flu like symptoms in the mother, but fetal and neonatal effects are more serious
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TORCH
-symptoms resulting from the infections are more serious in the neonate or the mom? |
fetal/neonatal
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What does
T O R C H stand for? |
-toxoplasmosis
-other infections (hepatitis,GBS, varicella, HIV) -rubella -cytomegalovirus -herpes simplex virus |
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often silent infections and destructive to the woman's reproductive tract –damage to fallopian tubes
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Chlamydia trachomatis
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Most common and fastest spreading STI
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Chlamydia trachomatis
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Chlamydia trachomatis ->50% Infants of positive mother will develop (2)
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conjunctivitis or pneumonia
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Ophthalmia neonatorum (eye infections. This is why we put vitamin K in)
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Gonorrhea
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Perinatal complications of gonococcal infection include:
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-Premature rupture of membranes
-Preterm birth -Chorioamnionitis -Neonatal sepsis – baby is severely infected and very sick -Intrauterine growth restriction (IUGR) -Maternal postpartum sepsis |
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Initial infection characterized by multiple painful lesions, fever, chills, malaise, and severe dysuria
-doesn’t go away, a lot of people take antiviral’s in pregnancy. even if you have a c section, the baby is still exposed |
Herpes simplex virus (HSV)
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Maternal infection with HSV-2 can have adverse effects on both mother and fetus
If early in pregnancy and she is infected, risk for (2) or ___________if infection is later in pregnancy baby will most likely be born with it |
congenital anomalies or Miscarriage
congenital infection |
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what is the most severe complication of HSV
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Neonatal herpes
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what is the most effective means of preventing HAV transmission
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Vaccination
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Syndrome in which normal H2O2-producing lactobacilli are replaced with high concentrations of anaerobic bacteria
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Bacterial vaginosis (BV
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not a vaginal infection. It is normal flora but it can cause GBS infection in the neonate. If the baby passes through and gets that in it’s lungs the baby can have a GBS infection. In labor they are treated with antibiotics so the baby can come through safely
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Group B streptococcus
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Associated with poor pregnancy outcomes
Important factor in neonatal morbidity and mortality Screening at 36-37 weeks of gestation (vaginal rectal culture) decreases risk |
Group B streptococcus
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-once a women is + she will always be +. If she is treated during labor, it can come back in 5-6 weeks.
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Group B streptococcus
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Form group of infections capable of crossing the placenta and adversely affecting the fetus
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TORCH
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Toxoplasmosis what is the definitive host
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(cat – women should not scoop liter pans)
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Cytomegalovirus
can cause what? |
Microcephaly, eye, ear and dental defects, mental retardation
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