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Floore TG, Petersen JL, Shaffer KR. Efficacy studies of Aquaprene (emulsifiable concentrate and wettable powder) insect growth regulator formulations against third- and fourth-stage larvae of Ochlerotatus taeniorhynchus in small-plot field studies. JOURNAL OF THE AMERICAN MOSQUITO CONTROL ASSOCIATION 2006; 22:119-22. [PMID: 16646333 DOI: 10.2987/8756-971x(2006)22[119:esoaec]2.0.co;2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Efficacy studies were conducted with Aquaprene emulsifiable concentrate (EC) (33.6% active ingredient [AI]) and wettable powder (WP) (40% AI) (S)-methoprene insect growth regulator formulations against larval Ochlerotatus taeniorhynchus in small field test plots. Aquaprene EC was applied at 7.18 and 9.57 g/acre. Approximately one thousand 4th-stage larvae were added to each plot before treatment, and 24 h later pupae were collected to determine emergence inhibition. At both applications rates, Aquaprene EC was extremely effective (99%) at significantly reducing adult emergence in the studies. Two application rates ((S)-methoprene at 2.4 and 4.8 g/acre) of the Aquaprene WP also were evaluated against Oc. taeniorhynchus at 1, 3, 7, and 14 days after treatment. Emergence inhibition and statistical analysis showed that significant differences were found between the (S)-methoprene rates of 2.4 and 4.8 g/acre at each posttreatment assessment. The (S)-methoprene rate of 4.8 g/acre was effective in controlling adult emergence for up to 14 days after treatment.
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Floore TG, Petersen JL, Shaffer KR. Efficacy studies of Vectobac 12as and Teknar HP-D larvicides against 3rd-instar Ochlerotatus taeniorhynchus and Culex quinquefasciatus in small plot field studies. JOURNAL OF THE AMERICAN MOSQUITO CONTROL ASSOCIATION 2004; 20:429-433. [PMID: 15669386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Efficacy studies were conducted with VectoBac 12AS and Teknar HP-D larvicides against 3rd-instar Ochlerotatus taeniorhynchus and Culex quinquefasciatus in small field test plots. The products were obtained off the shelf from distributors and had different lot numbers. They were evaluated over a 2-year period in spring 2002 and 2003. Application rates were 0.29, 0.58, and 1.10 liter/ha and evaluations were made 24 and 48 h after treatment. Both products performed well in these studies, with VectoBac 12AS being more effective at the 0.29 liter/ha rate.
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Cilek JE, Petersen JL, Hallmon CE. Comparative efficacy of IR3535 and deet as repellents against adult Aedes aegypti and Culex quinquefasciatus. JOURNAL OF THE AMERICAN MOSQUITO CONTROL ASSOCIATION 2004; 20:299-304. [PMID: 15532931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Arm-in-cage laboratory evaluations of 2 proprietary formulations of the mosquito repellents IR3535 and N,N-diethyl-3-methylbenzamide (deet; aqueous cream, hydroalcoholic spray) were made with 10 and 20% concentrations of each repellent. Also, 4 commercially available products containing IR3535 (Expedition insect repellent 20.07% active ingredient [AI], Bug Guard Plus with SPF30 sunscreen 7.5% AI, Bug Guard Plus with SPF15 sunscreen 7.5% AI, and Bug Guard Plus 7.5% AI) were tested. All comparisons were made on an equal formulation or concentration basis. Eight volunteers tested all formulations or products 3 times against laboratory-reared, Aedes aegypti and Culex quinquefasciatus mosquitoes (6-10 days old). Products were applied to a forearm at the rate of 0.002 g/cm2. The other forearm was not treated and served as a control. Elapsed time to 1st and 2nd consecutive bite was recorded. Mean protection time (i.e., time to 1st bite) with proprietary formulations of IR3535 were comparable to those of deet, with 20% concentrations providing greater protection against Ae. aegypti (3 h) and Cx. quinquefasciatus (6 h). Mean protection time for commercial products containing IR3535 ranged from nearly 90 to 170 min for Ae. aegypti and 3.5 to 6.5 h for Cx. quinquefasciatus. Mean time to the 2nd bite was similar to time to 1st bite for each mosquito species, product, and formulation.
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104
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Petersen JL, Bischof R, Krapu GL, Szalanski AL. Genetic variation in the midcontinental population of sandhill cranes, Grus canadensis. Biochem Genet 2003; 41:1-12. [PMID: 12645869 DOI: 10.1023/a:1020985427461] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Three subspecies of sandhill crane (Grus canadensis) are recognized in the Midcontinental population, the lesser (Grus c. canadensis), Canadian (G. c. rowani), and greater (G. c. tabida). Blood samples collected on the population's primary spring staging area in Nebraska, U.S.A., were used to resolve the genetic relationship among these subspecies. Phylogenetic analysis of 27 G. canadensis, by DNA sequencing of a 675 bp region of the mtDNA, supports the subspecies designations of G. c. canadensis and G. c. tabida. G. c. rowani individuals were intermediate with each of the other two subspecies. Genetic divergence ranged from 6.5 to 14.5% between G. c. canadensis and G. c. tabida, 0.5 to 6.6% within G. c. canadensis, and 0.1 to 6.0% within G. c. tabida. Sufficient DNA for analysis was obtained from shed feathers indicating a source of genetic material that does not require the capture or sacrifice of the birds. Other genetic markers and methods, including satellite telemetry, are required for obtaining detailed information on crane distributions as needed to establish effective management units for the MCP.
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105
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Li H, Petersen JL, Wang KK. Novel synthesis of 4,5-diarylphenanthrenes via C2-C6 cyclization of benzannulated enyne-allenes. J Org Chem 2001; 66:7804-10. [PMID: 11701039 DOI: 10.1021/jo010687l] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new synthetic pathway to the 4,5-diarylphenanthrenes 8 having a helical twist in their structures was developed. The synthetic sequence involves condensation of the diketone 5 with 2 equiv of the lithium acetylides derived from the diacetylenes 4 followed by protonation to produce the propargylic alcohols 6. Reduction of 6 with triethylsilane in the presence of trifluoroacetic acid furnished the tetraacetylenic hydrocarbons 7 in nearly quantitative yields. Treatment of 7 with potassium tert-butoxide under refluxing toluene at 110 degrees C for up to 10 h then furnished the 4,5-diarylphenanthrenes 8. Apparently, the transformation from 7 to 8 involves initial prototropic isomerizations to form the benzannulated enyne-allenes 9. Two subsequent formal intramolecular Diels-Alder reactions via the biradicals 10 and 12 derived from the C(2)-C(6) cyclizations then led to 13, which in turn underwent tautomerizations to give 8. The structure of 8a was established by the X-ray structure analysis, showing that the two phenyl substituents are bent away from each other and the central aromatic system is severely distorted with a helical twist. The existence of a helical twist in 8 imposed by the aryl groups at the 4- and 5-positions was also revealed with a set of AB (1)H NMR signals for the diastereotopic methylene hydrogens on the five-membered rings.
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106
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Petersen JL, Small GD. A gene required for the novel activation of a class II DNA photolyase in Chlamydomonas. Nucleic Acids Res 2001; 29:4472-81. [PMID: 11691935 PMCID: PMC60191 DOI: 10.1093/nar/29.21.4472] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
DNA photolyases catalyze the blue light-dependent repair of UV light-induced damage in DNA. DNA photolyases are specific for either cyclobutane-type pyrimidine dimers or (6-4) photoproducts. PHR2 is a gene that in Chlamydomonas reinhardtii encodes a class II DNA photolyase which catalyzes the photorepair of cyclobutane-type pyrimidine dimers. Based on amino acid sequence analysis of PHR2, which indicates the presence of a chloroplast targeting sequence, PHR2 was predicted to encode the chloroplast photolyase of Chlamydomonas. Using a sensitive gene-specific in vivo repair assay, we found that overexpression of PHR2 in Chlamydomonas results in targeting of the protein to not only the chloroplast, but also to the nucleus. Overexpression of PHR2 photolyase in a photoreactivation-deficient mutant, phr1, results in a largely inactive product. The phr1 mutant was found to be deficient in both photorepair of a chloroplast gene, rbcL, and a nuclear gene, rDNA. These results suggest that PHR2 is the structural gene for the photolyase targeted to both the chloroplast and the nucleus, and that the PHR1 gene product is necessary for full activity of PHR2 protein. To our knowledge, the requirement for a second gene for full activity of a DNA photolyase is novel.
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107
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Li H, Zhang HR, Petersen JL, Wang KK. Biradicals from benzoenyne-allenes. Application in the synthesis of 11H-benzo[b]fluoren-11-ols, 1H-cyclobut[a]indenes, and related compounds. J Org Chem 2001; 66:6662-8. [PMID: 11578218 DOI: 10.1021/jo0104577] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
New synthetic pathways to 11H-benzo[b]fluoren-11-ols, 1H-cyclobut[a]indenes, and related compounds via biradicals generated from benzoenyne-allenes were developed. Treatment of the diacetylenic propargylic alcohols 13, derived from condensation between benzophenones and the lithium acetylide of 1-(2-ethynylphenyl)-2-phenylethyne, with thionyl chloride produced the 11-chloro-11H-benzo[b]fluorene 14 and, after hydrolysis, the corresponding 11H-benzo[b]fluoren-11-ols 15. The transformation involved a sequence of reactions, including a biradical-forming C2-C6 cyclization (Schmittel cyclization) reaction of the chlorinated benzoenyne-allene intermediates followed by an intramolecular radical-radical coupling to form the formal Diels-Alder adducts. Interestingly, in the case of the diacetylenic propargylic alcohol 26, obtained from dibenzosuberenone (25), an intramolecular [2 + 2] cycloaddition reaction of the chlorinated benzoenyne-allene intermediate occurred, furnishing the 1H-cyclobut[a]indene 27 exclusively. The dramatic change of the reaction pathway could be attributed to the emergence of a steric strain due to the nonbonded interactions with the chloro substituent along the pathway toward the formal Diels-Alder adduct 31. On the other hand, the non-chlorinated benzoenyne-allene, derived from prototropic isomerization of the diacetylenic hydrocarbon 60, underwent a formal Diels-Alder reaction to furnish the 11H-benzo[b]fluorene-type hydrocarbon 61 exclusively.
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108
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Eisen GM, Dominitz JA, Faigel DO, Goldstein JL, Kalloo AN, Petersen JL, Raddawi HM, Ryan ME, Vargo JJ, Young HS, Fanelli RD, Hyman NH, Wheeler-Harbaugh J. Endoscopic therapy of anorectal disorders. Gastrointest Endosc 2001; 53:867-70. [PMID: 11375620 DOI: 10.1016/s0016-5107(01)70308-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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109
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Petersen JL, Lang DW, Small GD. Cloning and characterization of a class II DNA photolyase from Chlamydomonas. PLANT MOLECULAR BIOLOGY 1999; 40:1063-1071. [PMID: 10527430 DOI: 10.1023/a:1006279720960] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Damage to DNA induced by ultraviolet light can be reversed by a blue light-dependent reaction catalyzed by enzymes called DNA photolyases. Chlamydomonas has been shown to have DNA photolyase activity in both the nucleus and the chloroplast. Here we report the cloning and sequencing of a gene, PHR2, from Chlamydomonas encoding a class II DNA photolyase. The PHR2 protein, when expressed in Escherichia coli, is able to complement a DNA photolyase deficiency. The previously described Chlamydomonas mutant, phr1, which is deficient in nuclear but not chloroplast photolyase activity was shown by RFLP analysis not to be linked to the PHR2 gene. Unlike the recently reported class II DNA photolyase from Arabidopsis, the protein encoded by PHR2 is predicted to contain a chloroplast targeting sequence. This result, together with the RFLP data, suggests that PHR2 encodes the chloroplast targeted DNA photolyase.
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110
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Christensen HA, de Vasquez AM, Petersen JL. Short report epidemiologic studies on cutaneous leishmaniasis in eastern Panama. Am J Trop Med Hyg 1999; 60:54-7. [PMID: 9988322 DOI: 10.4269/ajtmh.1999.60.54] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The Panamanian Ministry of Health, through the Interamerican Development Bank, contracted the Gorgas Memorial Laboratory to conduct epidemiologic studies on leishmaniasis and malaria in eastern Panama from July 1984 through June 1985. Preliminary results of the biomedical and entomologic teams investigating the epidemiology of cutaneous leishmaniasis in the eastern part of the country are presented in this short report. The principal findings of the study revealed 1) a large disparity in the incidence and prevalence of the disease among the five communities investigated; 2) the appearance of self-cures without the benefit of effective treatment; 3) a relatively high percentage of subclinical cases; and 4) determination of the sandfly vector species for each community. Also reported here is a case of a double infection with two distinct species of Leishmania, L. mexicana and L. amazonensis, in a single individual.
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111
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Kapteijn BA, Nieweg OE, Petersen JL, Rutgers EJ, Hart AA, van Dongen JA, Kroon BB. Identification and biopsy of the sentinel lymph node in breast cancer. EUROPEAN JOURNAL OF SURGICAL ONCOLOGY 1998; 24:427-30. [PMID: 9800974 DOI: 10.1016/s0748-7983(98)92372-1] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
AIMS To examine the hypothesis that lymphatic dissemination in breast cancer occurs sequentially. METHODS Thirty patients with clinically localized adenocarcinoma were studied. Patent blue dye was administered into the tumour at the beginning of a modified radical mastectomy or segmental mastectomy with en bloc axillary lymph-node dissection (ALND). In the removed specimen, blue-stained lymphatic channels were dissected from the primary tumour to the first draining lymph node(s) (sentinel node(s)). RESULTS Identification of a sentinel node (SN) was successful in 26 patients (87%). In 10 patients the SN was tumour-positive. In six of these patients, the SN was the only tumour-positive node. There was no incidence of 'skip' metastasis. CONCLUSIONS This study confirms the sequential nature of lymphatic dissemination. When confirmed in vivo, these data may lead to a substantial reduction of the need for ALND without compromising survival and regional control and without loss of prognostic and staging information.
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112
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Petersen JL, Linley JR. Description of the egg of Aedeomyia squamipennis (Diptera: Culicidae). JOURNAL OF MEDICAL ENTOMOLOGY 1995; 32:888-894. [PMID: 8551515 DOI: 10.1093/jmedent/32.6.888] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The egg of Aedeomyia squamipennis (Lynch Arribalzaga) is described with the aid of scanning electron micrographs. This study allows separation of the eggs of Ad. squamipennis from the eggs of other mosquitoes inhabiting similar aquatic vegetation.
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113
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Bastianelli F, Ohta N, Petersen JL. A hierarchy of superstrings. PHYSICAL REVIEW LETTERS 1994; 73:1199-1202. [PMID: 10057650 DOI: 10.1103/physrevlett.73.1199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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114
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Jacobsen CN, Aasted B, Broe MK, Petersen JL. Reactivities of 20 anti-human monoclonal antibodies with leucocytes from ten different animal species. Vet Immunol Immunopathol 1993; 39:461-6. [PMID: 8116221 DOI: 10.1016/0165-2427(93)90075-f] [Citation(s) in RCA: 94] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Twenty commercially available monoclonal antibodies (mAbs) raised against various human leucocyte surface antigens were tested on lymphocytes, monocytes and granulocytes from horse, pig, cow, sheep, goat, dog, mink, rabbit, rhesus monkey as well as man. Eight antibodies reacted with leucocytes from some of the animals. These were the antibodies against CD2, CD4, CD5, CD8, CD14, CD18, HLA-DR, and the HLA-ABC antigen. The CD18 antibody reacted with lymphocytes, monocytes and granulocytes from all animals tested except goat. The CD14 antibody reacted with monocytes from pig, cow, sheep, goat, dog, mink, rabbit and monkey and with granulocytes from pig and rabbit. The anti-HLA-ABC reacted with leucocytes from monkey and cow. Finally, the CD2, CD4, CD5 and CD8 antibodies reacted with leucocytes from monkey only.
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115
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Key G, Petersen JL, Becker MH, Duchrow M, Schlüter C, Askaa J, Gerdes J. New antiserum against Ki-67 antigen suitable for double immunostaining of paraffin wax sections. J Clin Pathol 1993; 46:1080-4. [PMID: 7506714 PMCID: PMC501714 DOI: 10.1136/jcp.46.12.1080] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
AIMS To prepare a rabbit antiserum equivalent to MIB 1 to permit the simultaneous assessment of cell proliferation and other markers of interest using double labelling studies. METHODS Rabbits were immunised with a synthetic peptide deduced from the cDNA sequence coding for the Ki-67 antigen. Serum samples were tested for immunoreactivity using different immunobiochemical methods. RESULTS A polyclonal antiserum was derived which detects the native as well as recombinant parts of the Ki-67 antigen in different test systems. Furthermore, the antiserum stains the Ki-67 antigen in routinely processed, paraffin wax embedded material. CONCLUSIONS After antigen unmasking by microwave treatment the antiserum described here represents a powerful tool for the determination of growth fractions even in archival material. It is especially suitable for double staining experiments in combination with monoclonal antibodies.
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Holst J, Lindblad B, Bergqvist D, Nordfang O, Ostergaard PB, Petersen JL, Nielsen G, Hedner U. Antithrombotic properties of a truncated recombinant tissue factor pathway inhibitor in an experimental venous thrombosis model. HAEMOSTASIS 1993; 23 Suppl 1:112-7. [PMID: 8495862 DOI: 10.1159/000216920] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The aim of this study was to investigate whether a truncated recombinant tissue factor pathway inhibitor (rTFPI1-161) had an antithrombotic effect comparable to low-molecular-weight (LMW) heparin. A randomized double-dummy study was conducted with 40 rabbits in 6 groups. An experimental thrombosis was induced in the jugular veins by a combination of destroyed endothelium and restricted blood flow. Group 1 was given placebo; group 2, LMW heparin 60 anti-factor Xa units/kg; group 3, rTFPI1-161 0.1 mg/kg; group 4, rTFPI1-161 1.0 mg/kg and group 5, rTFPI1-161 10.0 mg/kg. rTFPI1-161 reduced the thrombus weights in all treated groups, with a significant effect in doses between 1.0 and 10.0 mg/kg compared to placebo. The frequency of thrombosis was significantly reduced in all treated groups. No hemorrhagic side effects were noted. In conclusion, rTFPI1-161 (1.0-10.0 mg/kg) has an antithrombotic effect comparable to that of LMW heparin.
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Nielsen C, Nielsen CM, Petersen JL, Gøtzsche PC, Pedersen C, Arendrup M, Vestergaard BF. Isolation of HIV from cultures of purified CD4+ lymphocytes. J Virol Methods 1991; 35:15-25. [PMID: 1686877 DOI: 10.1016/0166-0934(91)90081-a] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Isolation of HIV from cultures of CD4+ lymphocytes purified from peripheral blood by indirect panning was optimized and evaluated. Infectious HIV was isolated by single isolation attempts in 98% of 102 HIV-antibody-positive patients (55 had AIDS or ARC and 47 were clinically healthy). The average culture time required for positive cultures was largely independent of the CD4 count of the patients and 87% of the positive isolation cultures from both groups of patients became positive within 14 days of culture. An evaluation of the possible influence of media additives on propagation of HIV showed that: amphotericin-B had a suppressive effect on HIV replication at concentrations recommended for anti-fungal activity; recombinant and human interleukin-2 were equally suitable for both isolation cultures and for propagation of HIV, and polybrene, at a concentration of 2 micrograms/ml in the culture medium had a beneficial effect.
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de Vasquez AM, Saenz RE, Petersen JL, Christensen HA, Johnson CM. Leishmania mexicana complex: human infections in the Republic of Panama. Am J Trop Med Hyg 1990; 43:619-22. [PMID: 2267966 DOI: 10.4269/ajtmh.1990.43.619] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Parasites of the genus Leishmania responsible for human cutaneous leishmaniasis in the New World form 2 major taxonomic divisions: the Leishmania braziliensis and the L. mexicana complexes. We report the isolation and characterization of the L. mexicana complex among humans in the Republic of Panama. Characterization was based on parasite morphology, pathogenesis in infected golden hamsters, cellulose acetate isoenzyme electrophoretic mobilities, and membrane-specific monoclonal antibodies using the radioimmune binding assay technique.
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119
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Nielsen C, Petersen JL, Nielsen CM, Pedersen C, Mathiesen LR, Vestergaard BF. Isolation of HIV using T-lymphocyte 'panning': methodological aspects. J Virol Methods 1989; 26:105-14. [PMID: 2574183 DOI: 10.1016/0166-0934(89)90078-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A technique for isolation of HIV using selective cultures of T4 cells obtained from peripheral blood by immunochemical separation was developed and optimized. Using this method infectious virus could be isolated in single isolation attempts from 89% of 35 HIV-infected patients in different stages of immunodeficiency. This isolation frequency was virtually independent of the stage of the disease, in contrast to the results obtained by the conventional isolation technique based on peripheral mononuclear cells (PMC). It is concluded that isolation of HIV from selected T4 cells is superior to other methods when isolation is attempted from healthy HIV-infected individuals.
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120
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Dutary BE, Petersen JL, Peralta PH, Tesh RB. Transovarial transmission of Gamboa virus in a tropical mosquito, Aedeomyia squamipennis. Am J Trop Med Hyg 1989; 40:108-13. [PMID: 2563641 DOI: 10.4269/ajtmh.1989.40.108] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
We report transovarial transmission of Gamboa virus (Bunyavirus) in Aedeomyia squamipennis, a tropical mosquito which is active and bloodfeeding throughout the year. Gamboa virus was isolated during each of the 28 months of the study from every mosquito stage, including eggs, demonstrating that vertical transmission is a maintenance mechanism of this virus. The overall minimum infection rate was 5.1/1,000 mosquitoes. Identification of the 567 isolates by neutralization indicated that greater than or equal to 2 serotypes or subtypes of Gamboa virus circulate at the study site.
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121
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Dutary BE, Petersen JL, Peralta PH, Galindo P, Tesh RB. [Mechanisms for the maintenance of Gamboa virus in the mosquito Aedeomyia squamipennis]. REVISTA MEDICA DE PANAMA 1987; 12:182-8. [PMID: 2892230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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122
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Post RD, Franks RD, Alford C, Petersen JL, House RM, Jackson AM, Baker NJ. MMPI results associated with abnormal responses to the DST and TRH tests. Psychol Rep 1986; 59:35-8. [PMID: 3090580 DOI: 10.2466/pr0.1986.59.1.35] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
In the present study, it was predicted that psychiatric inpatients who obtained abnormal responses on the Dexamethasone Suppression Test (DST) and the Thyrotropin Releasing Hormone Stimulation Test (TRH) would obtain higher elevations on the MMPI scales associated with depressive symptomatology than inpatients with normal DST and TRH responses. Patients with abnormal DST responses obtained significantly lower scores on the F, Psychopathic Deviate, and Paranoia scales, suggesting that they present themselves on the MMPI as less socially maladjusted, and less alienated from societal values than their depressed inpatient peers who obtained normal DST results. No differences were obtained between abnormal and normal responders on either the DST or TRH with respect to the MMPI scales that are typically associated with depression.
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123
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Thompson TL, Petersen JL. Improving recognition of psychiatric disorders in a primary care practice. Postgrad Med 1985; 78:155-9, 162. [PMID: 4070096 DOI: 10.1080/00325481.1985.11699227] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Primary care physicians can increase their recognition of psychiatric disorders in several ways. The first and most important is to maintain a high index of suspicion for these disorders, which are prevalent in primary care patients, and to know the frequent symptom presentations, both overt and covert, of the most common disorders. A variety of psychiatric screening questionnaires can be useful and may be given routinely or when a psychiatric disorder is suspected. Alternatively, psychiatric screening questions can be incorporated into the usual patient interview. Establishment of a good working relationship with a psychiatrist knowledgeable in current psychiatric diagnosis and therapy, including psychopharmacology, is advisable. Psychiatric consultation may be sought when diagnostic questions arise, and referral to a psychiatrist or coordinated treatment is often useful for patients with severe or persistent symptoms.
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124
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Post RD, Alford CE, Baker NJ, Franks RD, House RM, Jackson AM, Petersen JL. Comparison of self-reports and clinicians' ratings of unipolar major depression. Psychol Rep 1985; 57:479-83. [PMID: 4059456 DOI: 10.2466/pr0.1985.57.2.479] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Recent literature has unfavorably compared self-report measures of depression to clinician-administered measures such as the Hamilton Rating Scale. In the present study, the Beck Depression Inventory and the MMPI D scale were compared to the Hamilton Rating Scale to assess the effectiveness of each measure in discriminating unipolar depressed psychiatric inpatients ( n = 26) from inpatients without a major affective disorder ( n = 11). Scores on the Beck scale and the MMPI Depression scale but not the Hamilton Rating Scale were significantly related to the diagnosis of unipolar major depression.
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125
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Post RD, Petersen JL, Jackson AM, House RM, Franks RD, Baker NJ, Alford C. The Mezzich MMPI regression formula revisited. J Pers Assess 1985; 49:258-9. [PMID: 4032204 DOI: 10.1207/s15327752jpa4903_8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
In a sample of depressed psychiatric inpatients, the Mezzich regression formula, based on five MMPI scales, correlated moderately with clinicians' judgments and yielded few false negative diagnoses in identifying patients with unipolar Major Depressive Disorder, but was less effective in eliminating false positives.
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126
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Werner JK, Christensen HA, Davalos M, Petersen JL. Isoenzyme patterns of Leishmania isolates from Colombia. Am J Trop Med Hyg 1985; 34:438-9. [PMID: 4003660 DOI: 10.4269/ajtmh.1985.34.438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Promastigotes from four cutaneous leishmaniasis cases from Colombia were tested by cellulose acetate electrophoresis using nine enzyme systems. The isoenzyme profiles of the Colombian isolates were indistinguishable from each other and from Panamanian Leishmania braziliensis panamensis controls, but were distinct from an isolate of Leishmania braziliensis guyanensis from Brazil and three isolates from the Leishmania mexicana complex for the enzyme phosphogluconate dehydrogenase.
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127
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Petersen JL, Méndez E. [Identification of adults and pupas of the most common species of Panamanian Simuliidae (Diptera: Simuliidae)]. REVISTA MEDICA DE PANAMA 1984; 9:265-73. [PMID: 6494510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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128
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Dutary BE, Peralta PH, Petersen JL. [Biological studies of St. Louis encephalitis virus in Majé, Bayano]. REVISTA MEDICA DE PANAMA 1984; 9:200-11. [PMID: 6149603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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129
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Petersen JL, Bawden MP, Wignall FS, Latorre CR, Johnson CM, Miranda CR. [Mansonella ozzardi in Darién (Panama)]. REVISTA MEDICA DE PANAMA 1984; 9:236-46. [PMID: 6387821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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130
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Schiller EL, Petersen JL, Shirazian D, Figueroa Marroquín H. Morphogenesis of larval Onchocerca volvulus in the Panamanian black fly, Simulium quadrivittatum. Am J Trop Med Hyg 1984; 33:410-3. [PMID: 6731672 DOI: 10.4269/ajtmh.1984.33.410] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Simulium quadrivittatum Loew (Diptera: Simuliidae), a man-biting black fly, was shown, for the first time, to be capable of supporting development of Onchocerca volvulus Leuckart (Nematoda: Filarioidea) from microfilariae to third-stage (infective) larvae. The black flies were collected in Chiriqui Province, Panama and transported alive to Guatemala, where they were allowed to feed on a human subject infected with O. volvulus. Samples of these flies were dissected over an 11-day period to assess morphogenesis of the parasite. Vigorously motile microfilariae were recovered from the mid-gut during the first 24 hours postfeeding; second-stage larvae were found in the thoracic musculature on day 4; and fully developed third-stage larvae were obtained from the cephalic capsule by day 10. This rate of larval development is similar to that observed in Guatemalan S. ochraceum. Onchocerciasis is not known to occur in Panama. The results of the present study direct attention to a potential public health hazard there and possibly elsewhere in Central America.
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131
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Petersen JL, Pedersen V. [Cardiotoxic effects of lithium]. Ugeskr Laeger 1983; 145:3264-5. [PMID: 6659096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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132
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Méndez E, Petersen JL. [Medical and veterinarian profile of Simuliidae in Panama]. REVISTA MEDICA DE PANAMA 1983; 8:212-21. [PMID: 6359288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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133
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Petersen JL, Adames AJ, De León L. Bionomics and control of black flies (Diptera: Simuliidae) at the Fortuna Hydroelectric Project, Panama. JOURNAL OF MEDICAL ENTOMOLOGY 1983; 20:399-408. [PMID: 6194298 DOI: 10.1093/jmedent/20.4.399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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134
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Abstract
Palp-antenna is a homeotic mutant of Aedes aegypti that modifies the apex of the maxillary palps of both sexes into a variable number of antenna-like segments. The fine structure of the antenna, including sexual dimorphism, is apparent in the mutant palps. Palp-antenna is a sex-linked recessive. a linkage distance of 27.9 +/- 0.45 crossover units from sex is estimated from F2 and backcross data. Penetrance is complete; expressively is variable. The fitness of the mutant compares favorably with that of the wild type. The mapping of the ppa locus lengthens the known chromosome 1 linkage map of Aedes aegypti.
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135
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Barnes RW, Petersen JL, Krugmire RB, Strandness DE. Complications of brachial artery catheterization: prospective evaluation with the Doppler ultrasonic velocity detector. Chest 1974; 66:363-7. [PMID: 4412555 DOI: 10.1378/chest.66.4.363] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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136
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Wolfe MS, Petersen JL, Neafie RC, Connor DH, Purtilo DT. Onchocerciasis presenting with swelling of limb. Am J Trop Med Hyg 1974; 23:361-8. [PMID: 4596041 DOI: 10.4269/ajtmh.1974.23.361] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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137
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Bruce RA, Kusumi F, Niederberger M, Petersen JL. Cardiovascular mechanisms of functional aerobic impairment in patients with coronary heart disease. Circulation 1974; 49:696-702. [PMID: 4817710 DOI: 10.1161/01.cir.49.4.696] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Maximal oxygen uptake V
O
O2
max
) and functional aerobic impairment (FAI) were determined by treadmill test in 42 men with coronary heart disease and in 11 slightly older healthy men. Patients were separated according to occurrence or nonoccurrence of angina with exercise. At rest and at four levels of submaximal exercise on a bicycle ergometer, cardiac output (Q), using the direct Fick principle, heart rate (HR), mean systemic and pulmonary arterial pressures, and arterial-mixed venous oxygen difference (A-V O
2
D) were evaluated in relation to relative aerobic requirement (% V
o
o2
max
). Q was highly correlated with V
o
o2
, and both the level and the rate of change of Q were lower in patients with angina at all submaximal workloads. Stroke volume (SV) and HR were significantly restricted at the higher workloads. Although peripheral resistance was increased, there was no compensatory increase in A-V O
2
D. Both restricted SV and reduced HR are responsible for cardiovascular components of the abnormal FAI found in patients with myocardial ischemia due to coronary arterial disease.
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138
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Barnes RW, Petersen JL, Krugmire RB, Strandness DE. Complications of percutaneous femoral arterial catheterization. Prospective evaluation with the Doppler ultrasonic velocity detector. Am J Cardiol 1974; 33:259-63. [PMID: 4810024 DOI: 10.1016/0002-9149(74)90285-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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139
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Dodge HT, Kennedy JW, Petersen JL. Quantitative angiocardiographic methods in the evaluation of valvular heart disease. Prog Cardiovasc Dis 1973; 16:1-23. [PMID: 4268503 DOI: 10.1016/0033-0620(73)90002-9] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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140
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141
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Brohm O, Petersen JL. [Intervertebral disc calcification in children. Review and report of 2 new cases]. NORDISK MEDICIN 1971; 85:921-6. [PMID: 5569703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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142
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Kjaer M, Petersen JL. [Hypertension and oral contraceptives]. Ugeskr Laeger 1971; 133:1082-4. [PMID: 5556612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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143
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Petersen JL. [Carbamazepine (Tegretol) poisoning. A case report]. Ugeskr Laeger 1969; 131:1131-3. [PMID: 5797027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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