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Biomedical subjects

H Konrad

Publications and source records attributed to H Konrad.

At least 37 records · Page 2Linked to original sources

Rehabilitation of a child with partial unilateral cryptophthalmos and multiple congenital anomalies.

PURPOSE: This paper describes the surgical rehabilitation of a child with craniofacial anomalies, unilateral syndactyly, and partial unilateral cryptophthalmos associated with inferior colobomata of the iris and optic nerve and agenesis of the inferior rectus and inferior oblique muscles. The clinical presentation of cryptophthalmos is described. METHODS: The medical literature since the original description of cryptophthalmos in 1872 was reviewed to define patterns of inheritance and the incidence of associated anomalies. RESULTS: Including this patient, 149 case reports of cryptophthalmos were identified. In two families transmission from parent to child suggests dominant inheritance. None of the five dominant cases had any other anomalies, and all had bilateral complete cryptophthalmos. The incidence of cryptophthalmos in the remaining families is consistent with autosomal recessive inheritance. This group includes patients with bilateral, unilateral, and partial cryptophthalmos. Other anomalies are common, including those of the ear and nose, limbs, genitourinary system, and mouth and palate. Mortality in the perinatal period is associated with renal agenesis, laryngeal atresia, and pulmonary hypoplasia. CONCLUSIONS: Cryptophthalmos is a rare congenital anomaly with two patterns of inheritance.

Abnormalities, Multiple↗

Enzyme-linked immunosorbent assay for Salmonella serology using lipopolysaccharide antigen.

Enzyme-linked immunosorbent assay (ELISA) using Salmonella lipopolysaccharide (LPS) to measure specific IgG titers in cattle has proven useful. Serology can be used to assess vaccine responses and infection rates, to detect carriers, and to aid in epidemiologic studies. The objective of this study was to assess cross-reactions using sera from cattle vaccinated with different Salmonella serogroups. ELISA plates using lipopolysaccharide from serogroup B, C1, C3, D1 or E1 as the plate antigens were tested. LPS was extracted from Salmonella typhimurium (Serogroup B; somatic antigens 01, 4, 12), S. montevideo (C1; 06, 7), S. kentucky (C3; 08, 20), S. dublin (D1; 01, 9, 12) and S. anatum (E1; 03, 10) using the Westphal method. Fifteen cows were found to be seronegative for all 5 of these serogroup antigens. Each cow was then vaccinated 3 times at 2-week intervals with a killed Salmonella bacterin. The 15 different serotypes used for vaccination were chosen to represent a wide array of Salmonella serogroups with a wide array of somatic "O" antigens expressed, including somatic antigens 1, 2, 3, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 18, 19, 20, 22, 23, 25, and 27. With each antigen tested, the highest ELISA titers were seen with sera from cattle vaccinated with homologous O antigens, indicating that reactions were highly O antigen-specific. Some cross reactions between subgroups sharing one O factor antigen were found; these titers were lower than those found with homologous serogroups sharing 2 or more antigens. Only serum from the cow vaccinated from S. anatum (group E; antigens 03, 10) cross-reacted at a low titer with group C1 (O somatic antigens 6, 7) and D1 (O somatic antigens 1, 9, 12) plate antigens, with which no somatic antigens were shared. We conclude from these results that Salmonella serology using LPS antigens is highly O antigen-specific and predictable.

Animals↗

Prevalence of salmonellae in cattle and in the environment on California dairies.

Milk samples were collected from all lactating cows on 60 dairies (mean number of cows/dairy, 584; range, 66 to 2,834) randomly selected from 701 California dairies enrolled in the Dairy Herd Improvement Association program. Samples were tested, by means of an ELISA, for antibodies against Salmonella serogroup B, C1, and D1 antigens (somatic antigens O1, 4, 6, 7, 9, 12). Blood samples were collected from all cows with positive results and tested for serologic evidence of exposure to salmonellae. Samples for bacteriologic culture (pooled feces from 20 randomly selected calves, swabs of wet areas and feces from calf pens and dairy hospital pens, drag swab sample from wastewater lagoon, and samples of feed components) were also collected from all 60 dairies. Seven (11.7%) of the 60 dairies each had 1 sample that yielded Salmonella organisms (3 S typhimurium, 1 S dublin, 1 nonmotile Group D salmonella, 1 S derby, and 1 S oranienberg). Five of the Salmonella isolates came from the hospital pens and 2 came from calf pens. Thirty-three dairies did not vaccinate cattle against salmonellosis, and of these, 24 (72.7%) had > or = 1 seropositive cow (titer > or = 200), and 20 (61%) had > or = 1 persistently seropositive cow (titer for each of 2 blood samples collected > or = 60 days apart was > or = 200). Of the 27 dairies that did vaccinate cows against salmonellosis, 24 (89%) had > or = 1 seropositive cow, and 21 (78%) had > or = 1 persistently seropositive cow.(ABSTRACT TRUNCATED AT 250 WORDS)

Animals↗

Production of Salmonella serogroup D (O9)-specific enzyme-linked immunosorbent assay antigen.

Serologic testing to detect persistent IgG titer directed at Salmonella lipopolysaccharide (LPS) has proven useful in detecting Salmonella carrier cattle without clinical signs of disease and in seroepidemiologic studies. Although little cross-reactivity exists between most Salmonella serogroups, groups B (O1, 4 [5], 12) and D (O1, 9, 12) share somatic (LPS cell wall) antigens O1 and O12, which results in some cross-reactions. This may be unimportant in most instances, because group-B and group-D carriers need to be identified and culled. It may be desirable in some situations, such as when trying to control S dublin, to determine which serogroup is present in a given herd. For this reason, a procedure to produce a pure O9 group-D antigen was developed. Salmonella dublin (group D) was grown by use of standard procedures, and LPS was extracted by use of the phenol-water method. The LPS was then oxidized with sodium periodate, dialyzed, reduced with sodium borohydride, cleaved with hydrochloric acid, and again dialyzed. This procedure successfully cleaved the saccharides comprising O antigens 1 and 12, leaving a pure O9 ELISA antigen. Sera from cattle vaccinated or naturally infected with S typhimurium, S agona, and S schwarzengrund (all group B), S montevideo (group C1), and S dublin (group D) were tested by ELISA, using modified and unmodified antigens. When the ELISA antigen used was the chemically modified (pure O9) group-D antigen, elimination of cross-reactions confirmed the structural loss of cross-reacting O1 and O12 antigens.

Animals↗

Extracapsular cataract extraction and posterior-lip sclerectomy with viscoelastic.

A review of 15 cases suggests that posterior-lip sclerectomy can be performed safely with extracapsular cataract extraction (ECCE) and posterior chamber lens implantation. The anterior chamber was filled with viscoelastic at the end of each procedure; no case required reoperation for shallow chamber or hypotony. The mean intraocular pressure after 1 year was 12.1 mm Hg. The astigmatism induced by the triple procedure did not differ significantly from that caused by ECCE alone during the initial 2 postoperative years. A new mathematical model that describes the change over time of postoperative astigmatism associated with these procedures is described.

Aged↗

[The value of the x-ray findings in the follow-up of the adult respiratory distress syndrome. A retrospective analysis].

Serial chest x-rays of 23 ARDS patients, taken in an 24 hour interval, were retrospectively analysed. Radiographic patterns of ARDS were divided into five stages and were related to corresponding parameters of respiratory status. Characteristic findings on chest x-ray films occurred after a short latency period following the clinical onset of ARDS. There was a close relationship between the time of maximum radiographic changes and maximum loss of lung function. The progression through successive radiologic stages was in many cases accompanied by a significant deterioration of functional parameters. Distinction between survivors and non-survivors was achieved while considering maximum radiographic abnormalities. The results suggest significance of serial chest x-rays in diagnosis and course estimation of ARDS.

Follow-Up Studies↗

Relation between plasma K+ and ventilation during incremental exercise after glycogen depletion and repletion in man.

1. We have examined the relationship between expiratory ventilation (VE), plasma potassium concentration ([K+]P), blood lactate concentration ([Lac-]B), and plasma pH (pHP) in five trained men before and after glycogen depletion and repletion in two successive incremental bicycle ergometer tests (tests A and B). 2. Though pHP was significantly higher after glycogen depletion (in relation to normal or repleted conditions) VE and [K+]P also tended to be higher. 3. There was no constant relation between the magnitude or the direction of change in lactic acidosis, or VE and [K+]P, respectively. Instead, a close temporal relationship between changes in VE and [K+]P was found. 4. A non-linear increase in VE occurred independently of changes in pHP or [Lac-]B, but could be well predicted from a non-linear increase in [K+]P. 5. These findings indicate that lactic acidosis had no deciding effect on exercise ventilation in these experiments. They are consistent with the idea that the potassium increase may contribute to the ventilatory drive during exercise.

Adult↗

Prevention of infection in acute leukemia.

In a randomized study comparing cotrimoxazole plus colistin with ciprofloxacin, each in combination with nonabsorbable antimycotics, the incidence of major infections in terms of septicemias and pneumonias as well as of minor infections and episodes of unexplained fever (FUO) was higher in patients treated with ciprofloxacin. In cases of microbiologically documented infections, gram-positive cocci dominated by far. In surveillance cultures of oral washings and of feces, gram-negative enterobacteria were only rarely detected; however, large numbers of cultures were positive for Acinetobacter species. There were four cases of documented Pneumocystis carinii pneumonia in patients not receiving cotrimoxazole. The incidence of documented mycotic infections as well as the detection of fungi in surveillance cultures was similar in both treatment groups. A decrease in the number of adverse events, especially of allergic reactions, could not be achieved by the administration of ciprofloxacin. In conclusion, cotrimoxazole plus colistin in combination with nonabsorbable antimycotics remains the standard regimen for prevention of infection in patients with acute leukemia undergoing aggressive remission induction therapy. A detailed analysis of study II will be prepared for publication.

Acute Disease↗

Interrelationship between pH, plasma potassium concentration and ventilation during intense continuous exercise in man.

During resting conditions plasma hydrogen ion concentration ([H+]P) is known to influence ventilation (VE), whereas the control of plasma potassium concentration ([K+]P) at rest and of both [K+]P and VE during exercise are controversial issues. To obtain more information about these variables during muscular work, eight trained men performed two successive intense continuous cycle-ergometer tests, the first (test I) during metabolic acidosis, the second (test II) with an alkalotic pH. No correlation was found between [H+]P and [K+]P or VE in the direction of change of these variables in test I. Furthermore, no correlation between [H+]P and [K+]P in test I and II was seen. Instead [K+]P and VE changed in relation to the exercise intensity. We suggest that the results confirm [K+]P as an indicator of muscular stress. In addition, the similar behaviour of relative values of [K+]P and VE changes in test I (r = 0.9, m = 1.0, where m is the slope of the regression curve) supports the hypothesis that extracellular potassium controls VE and thereby [H+]P also.

Adult↗

[Megakaryocytes and thrombocytopoiesis in idiopathic thrombocytopenic purpura].

In idiopathic thrombocytopenic purpura (ITP) patients with histological signs of stronger auto-antibody synthesis (spleen follicle hyperplasia) more frequently revealed megakaryocyte changes due to antibodies and less frequently thrombocyte production compensatory increased than ITP patients with signs of weaker auto-antibody synthesis (spleen follicle normoplasia). The observation suggest that insufficient and frequently lacking compensatory increase of thrombocyte production in ITP is caused by an autoallergic disturbance of megakaryocyte maturation.

Adolescent↗

[Long-term prognosis of the results of splenectomy in idiopathic thrombocytopenic purpura].

The value of selected clinical and histological parameters for the prognosis of long-term results of splenectomies was investigated retrospectively in 50 patients with idiopathic thrombocytopenic purpura 4-14 years after surgery. Two parameters showed an association to the results of splenectomy, viz. spleen follicle size as well as site of thrombocytopenia degradation. Non-responders to splenectomy (n = 7) only turned up in spleen follicle hyperplasia, never in follicle normoplasia, however (p less than 0.01), four times more frequently in mainly extralienal thrombocyte degradation, also in predominantly lienal ones (p greater than 0.05).

Adolescent↗

Selective decontamination of the digestive tract and fungal infection in acute leukemia patients.

For prevention of infection we used an SD design including antibacterial (trimethoprim 480 mg/daily, sulfamerazine 720 mg/daily, and polymyxin 0.25 mg/daily) and antifungal (4-6 million IU nystatin/daily) components. We analyzed retrospectively 138 treatment periods in 108 patients. The intensified chemotherapy resulted in severe granulocytopenia below 0.1 x 10(9)/liter over 25.2 days. In 19 patients there was suspicion of major fungal infection; therefore they were given amphotericin B and 5-fluocytosine. Fourteen of them died; major fungal infections were documented in 5 cases. In 18% of all the deceased we found major fungal infections. There was a correlation between fungal infection, the late stages of the hematological malignancy, and the lesions on the oropharyngeal mucosa. However, in terms of the serological and culture findings no correlation appeared to exist between the group with and the group without fungal infection. The SD regime is meant to suppress the Candida cell concentration in the digestive tract but has no influence on Aspergillus in the respiratory tract.

Acute Disease↗

Prognostic significance of splenic follicle size in splenectomized idiopathic thrombocytopenic purpura patients.

The prognostic significance of splenic follicle (B-lymphocyte compartment) size was studied in 62 patients splenectomized for idiopathic thrombocytopenic purpura (ITP). Patients with hyperplasia of splenic follicles (mean follicle diameter greater than 500 micron) were more likely to relapse or to develop additional autoimmune disorders than patients without hyperplastic splenic follicles (mean follicle diameter less than 500 micron) (p less than 0.01). The enlargement of splenic follicles had a positive predictive value of 27% and a negative predictive value of 100% for a poor outcome of splenectomy. Thus, the histological examination of spleens surgically removed for ITP seems to be an appropriate method to obtain the first indication of the possible long-term effect of splenectomy almost immediately after the operation.

Adolescent↗

[Blood coagulation factors and proteinase inhibitors in cytostatic therapy of acute leukemia].

In 64 patients affected with acute leukaemia (51 patients with acute non-lymphatic leukaemia and 13 patients with acute lymphatic leukaemia) extensive investigations of blood coagulation were made during cytostatic therapy. The following conspicuous changes of haemostatasis could be observed in making the diagnosis: Lowered quick value and shortened PTT, increased fibrinogen, fibrinopeptide, A, alpha 1-antitrypsin and alpha 2-macroglobulin, diminished plasminogen and plasma fibrininectin. According to TAD (VP) protocol the induction therapy leads to hypercoagulability which can be recognized by an increase of fibrinopeptide A, coagulating factors and shortening of PTT. During the therapy with L-asparaginasis procoagulatoric as well as thromboprotective coagulating proteins are diminished. A dense laboratory control enables those disturbances of haemotasis caused by disease or therapy to be separated and contributes to preventing complications during the cytostatic induction therapy.

Adult↗

[Plasma fibronectin in acute leukemia. Effects of the cytostatic therapy on plasma fibronectin level].

Twice a week plasma (Pl.)-fibronectin was determined quantitatively in the course of disease with immunoelectrophoresis according to Laurell in 12 patients suffered from acute non-lymphoblastic leukemia (ANLL) and in 12 patients affected with acute lymphoblastic leukemia (ALL). At diagnosis Pl.-fibronectin concentration was found to be significantly lowered only in those patients affected with ANLL. During the induction therapy Pl.-Fibronectin could be observed to decline significantly in all patients: in acute non-lymphoblastic leukemia from mean 270 micrograms/ml, s 93 micrograms/ml, to mean 185 micrograms/ml, s 89 micrograms/ml (p less than 0.01), and in acute lymphoblastic leukemia from mean 290 micrograms/ml, s 98 micrograms/ml, to mean 180 micrograms/ml, s 94 micrograms/ml (p less than 0.01). After administering L-asparaginase there is a strong decline of Pl.-fibronectin. Pl.-fibronectin concentration could be observed to be significantly lower in patients without remission in comparison to those with remission. A correlation between Pl.-fibronectin concentration and tumour mass could not be identified.

Acute Disease↗

[Detection of factor XIII deficiency in acute leukemia with resonance thrombography].

In 16 patients affected with acute leukemia (7 patients with acute lymphatic leukemia and 9 patients with acute myeloid leukemia) the resonance thrombogramme was recorded during cytostatic induction therapy, coagulation factor XIII (subunit XIII-A, XIII-S) and further hemostasiological parameters were determined. Subunit XIII-A was lowered to 36%, subunit XIII-S to 65% and the fibrin formation time of the resonance thrombogramme was extended to 9 minutes. There exists a negative correlation between component XIII-A and fibrin formation time r = -0.48 (p less than 0.01). The influence exerted by diminishing factor XIII and fibrin(ogen) splitting products on the fibrin formation time was investigated in in-vitro tests. A diminution of factor XIII below 10% will extend the fibrin formation time to about 10 minutes, an increase of fibrin(ogen) splitting products to 100 micrograms/ml to about 3 minutes.

Adult↗