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[Abortion in sheep: epidemic Salmonella abortusovis outbreak 2005 in Switzerland].

In spring 2005, the outbreak of contagious abortion caused by Salmonella Abortusovis in 6 sheep flocks in Switzerland led to considerable economic losses. The Swiss small ruminant health service (BGK) evaluated this case. The aim was to identify the source of the epidemic in order to avoid further spread of infection and to evaluate the possibility of using vaccination. Moreover, a strategy for prevention of future outbreaks was developed. This article aims to increase disease awareness of food animal practitioners for Salmonella Abortusovis abortion in sheep.

Abortion, Veterinary↗

Protective immunity to Sarcocystis capracanis-induced abortion in dairy goats.

Eleven female goats (Nos. 1 to 11) were each inoculated orally with 10(4) sporocysts of Sarcocystis capracanis, and four female goats (Nos. 12 to 15) were not inoculated. Between 31 and 69 days after inoculation (DAI) goats were mated with a single buck; one goat (No. 5) did not breed. Eight inoculated goats were challenged with 10(5) or 10(6) sporocysts, 135 DAI. Two of four goats challenged with 10(6) sporocysts and one of three goats challenged with 10(5) sporocysts aborted one month before the expected time of parturition. The three inoculated goats that were not challenged delivered healthy kids. All inoculated goats including the nonpregnant one (No. 5) were only mildly ill from the primary or challenge inoculations. Two of the four control goats challenged with 5 X 10(4) or 10(5) sporocysts aborted 21 days later, and both died of sarcocystosis 25 and 88 DAI. The two remaining control goats delivered normal kids. The results indicate that immunization prior to pregnancy protects some but not all goats from Sarcocystis-induced abortion.

Abortion, Veterinary↗

Early spontaneous abortions and fetal thymic abnormalities in maternal-to-fetal HIV infection.

The thymus is thought to play a major role in the immunopathogenesis of human immunodeficiency virus (HIV) infection, particularly in maternal-to-fetal HIV transmission. Characteristic lesions of the HIV-infected thymus include a prominent CD4+ CD8+ T lymphocyte depletion at the corticomedullary junction, the region of the thymus where immune selection occurs. At least threefold excess early spontaneous abortions were noted in a cohort of 124 HIV-infected pregnant women. In these 13 abortuses a very high rate (54%) of HIV vertical transmission was documented, with the thymus gland particularly affected. It is possible that the thymic insult in HIV-infected fetuses contributes to immune rejection of the fetus, possibly by an imbalance of maternal and fetal T1- and T2-type cytokines, known to be important in HIV disease progression. We propose, therefore, that the early spontaneous abortions occurring in HIV-infected pregnant women are due, at least in part, to abnormal immune forces created by HIV infection of the thymus.

Abortion, Spontaneous↗

Risk from chlamydia.

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Abortion, Veterinary↗

Experimental infection of pregnant ewes with Listeria monocytogenes.

Eight 18-month-old ewes were infected orally with Listeria monocytogenes between 77 and 91 days of pregnancy. Only one ewe aborted, 10 days after the first infecting dose, at 94 days of gestation; L monocytogenes was isolated from several sites in both its aborted fetuses. Two days after the first infecting dose all the ewes exhibited mild illness and pyrexia lasting for two to three days but the ewe which aborted was seriously ill until nine to 10 days after aborting. Agglutination tests carried out on 2-mercaptoethanol reduced sera revealed a strong immunological response in all the infected ewes but in the ewe which aborted this response was delayed. Four uninfected ewes which were kept as controls remained healthy throughout the experiment and showed no evidence of 2-mercaptoethanol resistant antibodies to L monocytogenes. Growth retardation lines, occurring at the time of and after experimental infection, were found in the bones of 14 of 17 newborn lambs in both the infected and control groups; in the aborted lambs these lines occurred before the infection.

Abortion, Veterinary↗

Seroconversion and abortion in cattle experimentally infected with Brucella sp. isolated from a Pacific harbor seal (Phoca vitulina richardsi).

Previously unrecognized Brucella species have been isolated from a number of marine mammals, including harbor seals (Phoca vitulina richardsi) in the Puget Sound area of the state of Washington. Because of the presence of dairy herds in proximity to the harbor seal populations, a study was conducted to determine the effects of the harbor seal Brucella isolate in experimentally inoculated cattle. Six pregnant cattle were exposed by intravenous injection (n = 3) or intraconjunctival inoculation (n = 3). Two pregnant cows were intravenously injected with saline and served as controls. All of the cows receiving the Brucella seroconverted on 1 or more tests commonly used for the detection of Brucella abortus infection. Two of the cattle receiving the intravenous inoculation aborted, and brucellae were demonstrated in the fetuses and dams immediately following abortion. The remaining 4 Brucella-inoculated animals and their fetuses were culture negative for the organism at 14 weeks postinoculation. Results of this study indicate the marine mammal Brucella is capable of producing seroconversion and abortion in cattle but is less pathogenic in that species than B. abortus.

Abortion, Veterinary↗

"Throwing the dice": pregnancy decision-making among HIV-positive women in four U.S. cities.

CONTEXT: Although AIDS-related deaths among U.S. women have decreased, the number of HIV-positive women, especially of reproductive age, has increased. A better understanding of the interaction between HIV and family planning is needed, especially as antiretroviral medications allow HIV-positive women to live longer, healthier lives. METHODS: Qualitative methods were used to examine pregnancy decision-making among 56 HIV-positive women in four U.S. cities. Biomedical, individual and sociocultural themes were analyzed in groups of women, categorized by their pregnancy experiences and intentions. RESULTS: Regardless of women's pregnancy experiences or intentions, reproductive decision-making themes included the perceived risk of vertical transmission, which was often overestimated; beliefs about vertical transmission risk reduction strategies; desire for motherhood; stigma; religious values; attitudes of partners and health care providers; and the impact of the mother's health and longevity on the child. Most women who did not want children after their diagnosis cited vertical transmission risk as the reason, and most of these women already had children. Those who became pregnant or desired children after their diagnosis seemed more confident in the efficacy of risk reduction strategies and often did not already have children. CONCLUSIONS: Future studies may help clarify the relationship between factors that influence pregnancy decision-making among HIV-positive women. HIV-positive and at-risk women of childbearing age may benefit from counseling interventions sensitive to factors that influence infected women's pregnancy decisions.

Abortion, Induced↗

[Clinical value of antenatal diagnosis of intrauterine active human cytomegalovirus infection with reverse transcription polymerase chain reaction].

OBJECTIVE: To study the clinical value of antenatal diagnosis of intrauterine active human cytomegalovirus (HCMV) infection with reverse transcription polymerase chain reaction (RT-PCR). METHODS: The active HCMV infection of pregnant women was diagnosed with enzyme-linked immunosorbent assay (ELISA), serum Nest-PCR (N-PCR) and RT-PCR. The methods of antenatal diagnosis include villus sampling, amniocentesis and cordocentesis under ultrasound guidance. RT-PCR and N-PCR was used to screen fetal active infection. RESULTS: The infection rate of chorionic villi and cord blood whose mother was in active infection is 53.3% (16/30) and 47.8% (33/69) respectively, whereas that whose mother just had infectious history is 8.3% (4/48), 9.7% (6/62) respectively, the differences are statistically significant respectively (P < 0.001). The active infection rate of chorionic villi and cord blood in maternal active infection group is 30.0% (9/30) and 29.0% (20/69) respectively, whereas that with infectious history is 4.2% (2/48) and 4.8% (3/62), the differences are statistically significant respectively (P < 0.001). In the active intrauterine infection, the incidence of abortion and premature delivery was 41.2% (14/34), significantly higher than that of the latent infection 8.0% (2/25, P < 0.01). CONCLUSIONS: Antenatal diagnosis of intrauterine active HCMV infection with RT-PCR and the means of sampling described are of safety and reliability. It has a great clinical value in management of the fetus whose mother had been in active HCMV infection.

Cytomegalovirus Infections↗

Use of a temporary vena cava filter in a woman with septic abortion and inferior vena cava thrombosis. A case report.

BACKGROUND: Ovarian vein and inferior vena cava (IVC) thrombosis are rare but life-threatening complications of severe obstetric infections. IVC filters have been used to reduce the risk of pulmonary embolus in patients who have recurrent thrombotic and embolic events or underlying risk factors. More recently, retrievable IVC filters have been used in patients in whom the risk is transient. CASE: At 18 weeks' gestation a multigravida with a fetus with anencephaly became septic after Laminaria placement and rupture of the membranes. She developed ovarian vein and IVC thrombosis and was treated successfully with a retrievable IVC filter, anticoagulation and antibiotics. The filter was removed after 9 days. CONCLUSION: In young patients at transient risk for emboli and requiring placement of an IVC filter, a retrievable filter should be considered to reduce the long-term risks of an indwelling filter.

Abortion, Induced↗