[Clinical epidemiology of cryptosporidiosis in calves]. / Klinische Epidemiologie der Kälber- Cryptosporidiose.

INTRODUCTION: The aim of this study was to determine whether there is an association between Cryptosporidium infections in calves and immunological factors, as well as farm-related factors or the application of the anti-cryptosporidiosis drug Halofuginone. From January to June 2010, 63 cow-calf-pairs from 20 different farms near Zürich, Switzerland have been investigated. Each cowcalf- pair was visited three times within the first 6 weeks of life to collect data of the farm and animals, as well as blood, faecal, colostral and milk samples. An ELISA using sporozoite antigen was developed for the specific detection of anti-Cryptosporidium-IgG in blood- and colostral serum. The IgG concentration in the bloodand colostral serum was determined using radial immuno diffusion test (RID). White blood cell isolation and differential blood cell counts and California Mastitis Test were performed. Bacteriological studies on quarter-milk-samples were carried out. Cryptosporidium oocysts were diagnosed with the modified Ziehl-Neelsen staining, other protozoa with the SAFC method and Eimeria oocysts and helminth eggs were diagnosed with the combined sedimentation/floatation test. ELISAs were performed for the detection of rota- and coronavirus, E. coli F5 and Cryptosporidium spp. in bovine feces (bio-X Diagnostics®, Belgium). The highest prevalence of Cryptosporidium oocysts was 54.0% and found 7 to 20 days post natum, whereas 47.1% were suffering from diarrhea. The transfer of total IgG with the colostrum and the humoral immunity of the calf could not prevent any infection with Cryptosporidium, but the severity of the diarrhea symptoms decreased with increasing total IgG concentrations. Calves housed in open sheds showed significantly more often diarrhea, i. e. they shed more Cryptosporidium oocysts during the first 4 days and 7 to 20 days post natum, respectively. Halofuginone (Halocur®) is approved for prophylaxis against cryptosporidiosis, but it showed no effect on the excretion of Cryptosporidium oocysts in the present study.

INTRODUCTION: Le but de la présente étude était d'étudier s'il existe un rapport entre l'apparition de cryptosporidies et des facteurs immunologiques, des facteurs liés à l'exploitation ainsi qu'à l'usage d'halofuginone. De janvier à juin 2010, on a examiné 63 paires mère-veau provenant de 20 exploitations du canton de Zürich. Au cours de 6 semaines on a effectué, à des moments choisis, trois visites. A ces occasions, des données relatives à l'exploitation ainsi que des échantillons de sang, de selles, de colostrum respectivement de lait ont été collectés. On a développé un test ELISA avec des antigènes de sporozoïtes pour mettre en évidence la présence IgG anti-cryptosporidies dans le sang et dans le colostrum. La concentration en IgG dans le colostrum et dans le sérum a été mesurée avec un test d'immunodiffusion radiale (RID). En outre on a réalisé une image sanguine différentielle des vaches et des veaux et effectué un test de Schalm chez les vaches. Un examen bactériologique a été réalisé sur un échantillon provenant des quatre quartiers. Les oocystes de cryptosporidies ont été mis en évidence au moyen d'une coloration de Ziehlk-Neelsen modifiée, les autres protozoaires ont été mis en évidence par la méthode SAFC et les oeufs d'helminthes ainsi que les oocystes d'Eimeria par un processus de sédimentation-flottation combiné. Un test ELISA a été utilisé pour les rota- et les coronavirus, les E. coli F5 et Cryptosporidium spp. dans les selles des bovins (Bio-X Diagnostics®, Belgique). La prévalence d'infections par des cryptosporidies était maximale entre le 7ème et le 20ème jour de vie des veaux (50.4%), 47.1% de ces veaux souffrant de diarrhée. Les stabulations libres augmentaient de façon significative le risque de diarrhée et d'excrétion de cryptosporidies entre le 1er et le 4ème jour respectivement entre le 7ème et le 20ème jour. La transmission d'IgG et l'immunité humorale des veaux n'empêchaient pas l'infection par des cryptosporidies mais la gravité de la diarrhée diminuait avec l'augmentation de la concentration des IgG totales. L'halofuginone, substance enregistrée pour la prophylaxie de la cryptosporidiose, n'a pas montré, dans cette étude, d'efficacité pour empêcher l'excrétion d'oocystes de cryptosporidies.

Smoked drug use in patients with TB is associated with higher bacterial burden.

BACKGROUND: Smoking of illicit drugs may lead to more rapid TB disease progression or late treatment presentation, yet research on this topic is scant. We examined the association between smoked drug use and bacterial burden among patients newly initiated on drug-susceptible TB (DS-TB) therapy.METHODS: Data from 303 participants initiating DS-TB treatment in the Western Cape Province, South Africa, were analyzed. Smoked drug use was defined as self-reported or biologically verified methamphetamine, methaqualone and/or cannabis use. Proportional hazard and logistic regression models (adjusted for age, sex, HIV status and tobacco use) examined associations between smoked drug use and mycobacterial time to culture positivity (TTP), acid-fast bacilli sputum smear positivity and lung cavitation.RESULTS: People who smoked drugs (PWSD) comprised 54.8% (n = 166) of the cohort. TTP was faster for PWSD (hazard ratio 1.48, 95% CI 1.10-1.97; P = 0.008). Smear positivity was higher among PWSD (OR 2.28, 95% CI 1.22-4.34; P = 0.011). Smoked drug use (OR 1.08, 95% CI 0.62-1.87; P = 0.799) was not associated with increased cavitation.CONCLUSIONS: PWSD had a higher bacterial burden at diagnosis than those who do not smoke drugs. Screening for TB among PWSD in the community may facilitate earlier linkage to TB treatment and reduce community transmission.

Comparison of questionnaire screening and urine toxicology for detection of pregnancy complicated by substance use.

OBJECTIVES: To compare the efficacy of structured questionnaire screening and prenatal urine toxicology for the detection of substance use by pregnant women, and to describe substance use patterns in a group of women presenting to a university-based obstetric clinic. METHODS: All patients presenting to our obstetric clinic for their first prenatal visit were evaluated for evidence of current use of alcohol or any illicit substances. Nursing personnel administered an extensive questionnaire, which included detailed questions about past and current substance use patterns. Urine samples were examined by a commercial laboratory for alcohol and a number of illicit substances. Current users were defined as those who admitted use within the past 30 days or who had positive urine toxicology. RESULTS: Fifty-eight of 302 patients (19.2%) were identified as current users of alcohol or illicit substances. Only 17 of 41 women (41.5%) with toxicologic evidence of recent use admitted to current use. Only 17 of 34 (50.0%) admitting to current use had toxicology positive for any substance. Patients with a history of multiple past substance use were significantly more likely to have positive urine toxicology than those without such a history (26.1 versus 7.4%; P < .005). Among current users, multiple substance use (34.5%) and cigarette smoking (52%) were common. CONCLUSION: A screening combination of structured questionnaire and universal urine toxicology identifies more current users than either technique alone, and neither is clearly superior to the other. A history of multiple substance use may be an important indicator of current use.

Cultural aspects of pain in childbearing women.

As the American population increases in ethnic diversity, nurses must prepare to care for women from various cultures. The American Nurses Association has stated that a knowledge of cultural diversity is vital at all levels of nursing. Culture is known to affect the patient's perception of pain and the nurse's inference of pain in the patient. Pain is expected in childbirth, and nurses should learn how cultures influences individual women in their expression of pain. Because each women is unique, nurses must combine information about culture with clinical assessment of the patient to provide culturally sensitive care.

Descriptions of comfort by substance-using and nonusing postpartum women.

OBJECTIVE: To compare definitions of comfort held by a group of postpartum substance users with those of a group of nonusers. SETTING: The postpartum unit of a large university hospital. PARTICIPANTS: The convenience sample constituted 36 postpartum women; half were substance users and half denied substance use. The nonusing participants were matched to the users according to age, race, type of delivery, and parity. DESIGN: Qualitative, descriptive. MAIN OUTCOME MEASURES: Data were collected through semistructured, individual interviews. Patients defined comfort and described the characteristics and patterns of comfort during the postpartum period. RESULTS: Data were analyzed into three categories of themes. Attributes of comfort were resolution of pain, resolution of fatigue, satiation of hunger, resolution of individual irritants, and relaxation. Interventions for comfort were standard therapy, supportive presence, and caring nursing approach. Modifiers of comfort were individualized comfort patterns, environmental ease, and maternal concern. CONCLUSIONS: Comfort is more than the absence of pain. A supportive presence and a caring nursing approach were the most helpful interventions.