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a phenomenon known as ciliocytophthoria<a class="elsevierStyleCrossRef" href="#bib0010"><span class="elsevierStyleSup">2</span></a>&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">Morphological criteria using various staining techniques have improved the identification of this protozoan<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a>&#46; Molecular biology methods have also recently contributed to deciphering their genetic sequence<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a>&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">LB are commensals found in their trophozoite form in the intestine of cockroaches<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a> and as cysts in the feces of these insects&#44; making them resistant to adverse environmental conditions&#46; It can be assumed that inhaling fecal particles containing protozoan cysts is the route of entry of the microorganism into the airways<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a>&#46; The favorable humidity and temperature conditions encountered in the respiratory tree allow the LB cysts to release their trophozoite forms&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">LB infection often manifests as bronchopneumonia with productive cough&#44; fever&#44; and dyspnea that does not respond to standard antibiotic therapy and yields nonspecific radiological images&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall">Treatment with metronidazole appears to resolve most clinical syndromes&#44; suggesting that a respiratory infection with consistent clinical symptoms that does not respond to conventional antibiotic therapy may be caused by LB&#46; However&#44; it is important to remember that metronidazole is effective against gram-negative and anaerobic germs&#44; so cultures and sensitivity testing are essential&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">The image from a left lower lobectomy specimen shared by the authors shows what they believe to be the presence of LB&#46;</p><p id="par0045" class="elsevierStylePara elsevierViewall">In our view&#44; the image provided is more in line with a small row of ciliated epithelial cells&#46; The criteria on which we base our premise are&#58; a&#41; the presence of a rounded nucleus in the basal position of the two cells on the left of the image&#59; b&#41; the existence of a clear terminal bar in the middle cell&#44; and c&#41; an arrangement of short&#44; uniform&#44; unidirectional cilia at the apical end&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">We provide an image to help compare these morphological criteria &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41; in which the phenomenon of ciliocytophthoria can be seen on the left&#44; with well preserved and oriented remains of cytoplasm and cilia anchored to the terminal bar&#46; On the right of the cytoplasmic remains&#44; we can see what could be the nucleus of the ciliated cell&#46; The image on the right shows a pyriform LB with numerous flagellae&#44; the longest in the center&#44; in an irregular arrangement&#46; 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Letter to the Editor
Lophomonas or Ciliated Epithelial Cells?
¿Lophomonas o células epiteliales ciliadas?
Rafael Martínez-Giróna,
Corresponding author
rmartinezgiron@hotmail.com

Corresponding author.
, Cristina Martínez-Torreb
a Fundación INCLÍNICA, Oviedo, Spain
b Facultad de Farmacia, Universidad de Salamanca, Salamanca, Spain
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    "titulosAlternativos" => array:1 [
      "es" => array:1 [
        "titulo" => "&#191;<span class="elsevierStyleItalic">Lophomonas</span> o c&#233;lulas epiteliales ciliadas&#63;"
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          "en" => "<p id="spar0005" class="elsevierStyleSimplePara elsevierViewall">Cytological sputum smear&#46; Left&#58; Ciliocytophthoria phenomenon&#44; and an accompanying polymorphonuclear leukocyte &#40;Papanicolaou&#44; 1000&#215;&#41;&#46; Right&#58; <span class="elsevierStyleItalic">Lophomonas blattarum</span>&#46; Bar scale 20&#8239;&#956;m &#40;Wheatley trichrome stain&#44; 1000&#215;&#41;&#46;</p>"
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    "textoCompleto" => "<span class="elsevierStyleSections"><p id="par0005" class="elsevierStylePara elsevierViewall">We read with interest the scientific letter from Pinos et al&#46;<a class="elsevierStyleCrossRef" href="#bib0005"><span class="elsevierStyleSup">1</span></a> on <span class="elsevierStyleItalic">Lophomonas blattarum</span> &#40;LB&#41; lung infection recently published in your journal&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">In this study&#44; the authors report 6 cases of lung infection allegedly caused by this multiflagellated protozoan that responded positively to treatment with metronidazole after unsuccessful empirical antibiotic therapy&#46;</p><p id="par0015" class="elsevierStylePara elsevierViewall">Bronchopulmonary infection by LB is quite rare and&#44; although numerous cases have been described in the literature&#44; it is unexpectedly common for this protozoan to be confused with bronchial epithelial cells or cell remains that retain only part of their cytoplasm and associated cilia and are capable of movement&#44; a phenomenon known as ciliocytophthoria<a class="elsevierStyleCrossRef" href="#bib0010"><span class="elsevierStyleSup">2</span></a>&#46;</p><p id="par0020" class="elsevierStylePara elsevierViewall">Morphological criteria using various staining techniques have improved the identification of this protozoan<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a>&#46; Molecular biology methods have also recently contributed to deciphering their genetic sequence<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a>&#46;</p><p id="par0025" class="elsevierStylePara elsevierViewall">LB are commensals found in their trophozoite form in the intestine of cockroaches<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a> and as cysts in the feces of these insects&#44; making them resistant to adverse environmental conditions&#46; It can be assumed that inhaling fecal particles containing protozoan cysts is the route of entry of the microorganism into the airways<a class="elsevierStyleCrossRef" href="#bib0030"><span class="elsevierStyleSup">6</span></a>&#46; The favorable humidity and temperature conditions encountered in the respiratory tree allow the LB cysts to release their trophozoite forms&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">LB infection often manifests as bronchopneumonia with productive cough&#44; fever&#44; and dyspnea that does not respond to standard antibiotic therapy and yields nonspecific radiological images&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall">Treatment with metronidazole appears to resolve most clinical syndromes&#44; suggesting that a respiratory infection with consistent clinical symptoms that does not respond to conventional antibiotic therapy may be caused by LB&#46; However&#44; it is important to remember that metronidazole is effective against gram-negative and anaerobic germs&#44; so cultures and sensitivity testing are essential&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">The image from a left lower lobectomy specimen shared by the authors shows what they believe to be the presence of LB&#46;</p><p id="par0045" class="elsevierStylePara elsevierViewall">In our view&#44; the image provided is more in line with a small row of ciliated epithelial cells&#46; The criteria on which we base our premise are&#58; a&#41; the presence of a rounded nucleus in the basal position of the two cells on the left of the image&#59; b&#41; the existence of a clear terminal bar in the middle cell&#44; and c&#41; an arrangement of short&#44; uniform&#44; unidirectional cilia at the apical end&#46;</p><p id="par0050" class="elsevierStylePara elsevierViewall">We provide an image to help compare these morphological criteria &#40;<a class="elsevierStyleCrossRef" href="#fig0005">Fig&#46; 1</a>&#41; in which the phenomenon of ciliocytophthoria can be seen on the left&#44; with well preserved and oriented remains of cytoplasm and cilia anchored to the terminal bar&#46; On the right of the cytoplasmic remains&#44; we can see what could be the nucleus of the ciliated cell&#46; The image on the right shows a pyriform LB with numerous flagellae&#44; the longest in the center&#44; in an irregular arrangement&#46; No terminal bar is observed&#44; but a small nucleus can be seen in the apical pole just below the flagellar insertion&#46;</p><elsevierMultimedia ident="fig0005"></elsevierMultimedia><p id="par0055" class="elsevierStylePara elsevierViewall">Because this protozoan is easily confused with ciliated epithelial cells on direct microscopy of fresh samples&#44; we recommend using specific staining techniques &#40;Wheatley trichrome&#44; Giemsa or Papanicolaou&#41; to assist in identification&#46; The current lack of an appropriate culture method for this parasite could be supplemented by molecular biology techniques&#46;</p><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Funding</span><p id="par0060" class="elsevierStylePara elsevierViewall">This study has not received specific grants from public sector agencies&#44; the commercial sector&#44; or non-profit organizations&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Conflict of interests</span><p id="par0065" class="elsevierStylePara elsevierViewall">The authors state that they have no conflict of interests&#46;</p></span></span>"
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        "nota" => "<p class="elsevierStyleNotepara" id="npar0005">Please cite this article as&#58; Mart&#237;nez-Gir&#243;n R&#44; Mart&#237;nez-Torre C&#46; &#191;<span class="elsevierStyleItalic">Lophomonas</span> o c&#233;lulas epiteliales cilidas&#63; Arch Bronconeumol&#46; 2021&#59;57&#58;726&#8211;727&#46;</p>"
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ISSN: 15792129
Original language: English
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