Browsing by Author "Bayingana, Claude"

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    Examination of maternal gingival crevicular fluid for the presence of selected periodontopathogens implicated in the pre-term delivery of low birthweight infants
    (Landes Bioscience, 2010) Africa, Charlene W.J.; Kayitenkore, Janet; Bayingana, Claude
    Background: Reports show that more than 20 million infants world-wide are born prematurely with 95% of all pre-term births occurring in developing countries. Oral colonization of Gram-negative anaerobes has been implicated as a risk factor for preterm delivery of low birth weight infants. Results: Association of bacterial species with the risk of periodontal disease and thus the risk of preterm delivery was only observed when they occurred in pairs or groups of three or more. Aa appeared to be a necessary co-factor for significant associations of bacterial groups with the variables recorded. Materials and Methods: This study comprised 200 women admitted to the department of obstetrics and gynecology of the teaching hospital of Butare in Rwanda. Gingival crevicular fluid was collected from each quadrant of the mother’s mouth (using paper points) within 24 hours of delivery. A dichotomous score of presence or absence of gingival inflammation was recorded for each patient along with demographic data such as age, marital status etc. Samples were examined by PC R for the presence of Aggregatibacter actinomycetemcomitans and selected members of the red and orange complexes described by Socransky et al. (1998), and their presence associated with age, gingival inflammation and pregnancy outcomes.
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    "A molecular investigation of the prevalence of suspected periodontopathogens and their association with preterm birth"
    (2010) Bayingana, Claude; Africa, Charlene
    More than 20 million infants in the world (15.5 % of all births) are born with low birth weight. Ninety-five % of them are in developing countries. Oral colonization of Gramnegative anaerobes has been implicated as a risk factor for preterm delivery of low birth weight (PLBW) infants. The objective of this study was to investigate the association between periodontal pathogens and pre-term delivery of low birth weight (PLBW) infants. The study sample included 200 randomly selected women admitted to the department of obstetrics-gynecology of the teaching hospital of Butare in Rwanda. Mothers were asked to complete a questionnaire in order to identify factors which might pose a health risk to them and their infants. Gingival crevicular fluid (GCF) was collected from each quadrant of the mother’s month (using paper points) within 24 hours of delivery. Ten ml of foetal cord serum samples were collected at delivery and 10 ml of maternal serum samples were collected within 48 of delivery. GCF was examined by PCR for the presence of 5 periodontopathogens and ELISA was used for the evaluation of cytokines (IL-6 and IL-10) and immunoglobulins (IgM, IgG) in foetal cord and maternal blood against the periodontopathogens. P. intermedia showed significant associations either on its own or in combinations with most indicators of periodontal disease used in this study, while Aa and members of the red complex were significantly associated with gum bleeding and reduced frequency of tooth brushing. A strong association between PLBW and maternal and foetal cord serum sample levels of IL-10 was observed. Also, a good association was observed between PLBW and FCB sample levels of IL-6. Significant associations were observed between PLBW and maternal IgG against the different peridontopathogens. The findings of this study may suggest that the levels of maternal IgG and foetal IgM against the different periodontopathogens are associated with dissemination of maternal periodontopathogens to the foetus thereby illiciting an inflammatory response which contributes to PLBW.
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    The Prevalence of Members of the “Red Complex” in Pregnant Women as Revealed by PCR and BANA Hydrolysis.
    (University of the Western Cape, 2005) Bayingana, Claude; Africa, Charlene; Dept. of Medical BioSciences; Faculty of Science
    Increased levels of oestrogen and progesterone during pregnancy may lead to periodontal disease. The anaerobic Gram-negative bacteria called red complex (Porphyromonas gingivalis, Tannerella forsythensis and Treponema denticola) are frequently associated with periodontal disease. Periodontopathogens produce toxins and enzymes which can enter the bloodstream and cross the placenta to harm the foetus. The response of the mother’s immune system to infection by these periodontopathogens, brings about the release of inflammatory mediators which may trigger preterm labour or result in low birth-weight infants. The purpose of this study was to examine the prevalence of red complex, using BANA and PCR in subginginval plaque samples from pregnant women. Subgingival plaque samples were obtained from pregnant women between the ages of 17 to 45 years attending a Mitchells Plain ante-natal clinic. Plaque samples were analyzed by the enzymatic BANA-test for detection of the presence of red complex and DNA was extracted and analyzed using 16 rDNA-Polymerase Chain Reaction (PCR). Seventy-nine percent of pregnant women showed gingival index scores of ≥ 1 of which 74.24% harboured by at least one of the members of the red complex. P.gingivalis was the most prevalent of the three members of the red complex. Findings of this study confirmed a need for dental preventive measures in pregnant women and microbial monitoring of suspected periodontopathogenes. This could be achieved by joint cooperation between Maternity Obstetric Units (MOU), Dentistry and oral microbiology departments. The results of this study revealed that although PCR is more sensitive than BANA in detecting members of the red complex, BANA showed a better association with the indices used to diagnose periodontal disease.
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    Risk factors of preterm delivery of low birth weight (plbw) in an African population
    (Academic Journals, 2010) Bayingana, Claude; Muvunyi, Claude Mambo; Africa, Charlene W.J.
    More than 20 million infants in the world (15.5% of all births) are born with low birth weight. Ninety-five percent of them are in developing countries. The objective of this study was to examine different factors which may contribute to preterm delivery of low birth weight (PLBW) in a recent sample of Rwandan birth. The study sample included 200 randomly selected women admitted to the department of obstetrics-gynecology of the teaching hospital of Butare in Rwanda. Mothers were asked to complete a questionnaire and obstetrics records were used in order to identify factors which might pose a health risk to them and their infants. Maternal weight, height, history of previous preterm and healthy conditions of the children in the family showed a significant relationship with PLBW. Maternal level of education, number of pregnancies of the mother, urinary tract infection, sexually transmitted disease, antibiotic administration, diabetes, history of heart disease, alcohol consumption and smoking showed a relationship with PLBW but the relationship was not significant. More studies are required for a better understanding of the mechanism leading to preterm delivery of low birth infants.
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    Risk factors of preterm delivery of low birth weight (plbw) in an African population
    (Academic Journals, 2010) Bayingana, Claude; Muvunyi, Claude Mambo; Africa, Charlene W.J.
    More than 20 million infants in the world (15.5% of all births) are born with low birth weight. Ninety-five percent of them are in developing countries. The objective of this study was to examine different factors which may contribute to preterm delivery of low birth weight (PLBW) in a recent sample of Rwandan birth. The study sample included 200 randomly selected women admitted to the department of obstetrics-gynecology of the teaching hospital of Butare in Rwanda. Mothers were asked to complete a questionnaire and obstetrics records were used in order to identify factors which might pose a health risk to them and their infants. Maternal weight, height, history of previous preterm and healthy conditions of the children in the family showed a significant relationship with PLBW. Maternal level of education, number of pregnancies of the mother, urinary tract infection, sexually transmitted disease, antibiotic administration, diabetes, history of heart disease, alcohol consumption and smoking showed a relationship with PLBW but the relationship was not significant. More studies are required for a better understanding of the mechanism leading to preterm delivery of low birth infants.