Trichophyton species isolated from asymptomatic patients of the pet-owner pair in Mexico

Document Type : Short Communication


1 Laboratorio de Investigación en Patometabolismo Microbiano. Universidad Autonoma de Guerrero. Chilpancingo, Guerrero, México.

2 Laboratorio de Investigación en Parasitología. Universidad Autonoma de Guerrero. Chilpancingo, Guerrero, México.

3 Laboratorio de Microbiología Molecular y Biotecnología Ambiental. Universidad Autonoma de Guerrero. Chilpancingo, Guerrero, México.



Background and Purpose: Superficial mycoses are the fourth most common cause of disease worldwide. It is not surprising that zoonotic transmission occurs to humans due to close contact with different animals, be it companion or farm animals. Therefore, the objective of this study was to determine the presence of asymptomatic dermatophyte carriers in the owner-pet pairs, identify the most common etiologic agents, and find the likely connection between the carrier status of an owner and the presence of dermatophytes in their pets.
Materials and Methods: From May 2019 to January 2020, 21 cats and 115 dogs with their respective owners were selected for dermatophyte culture. All the dogs and cats included in the study were from the communities of southeastern Mexico. The samples were taken with a cotton swab, which was vigorously rubbed and twisted on the scalp or body of the pet four times and grown on Mycosel Agar. The isolates were identified based on macroscopic and microscopic characteristics. The prevalence of the binomial ranged from 0.73% in pet skin and human hands to 2.2% in human scalp. In humans, the agents were Trichophyton tonsurans and Trichophyton verrucosum, while in pets, a
strain of Trichophyton sp was found.
Conclusion: Different species of dermatophytes were found in the owner/pet pairs, which denotes that coexistence is not related in asymptomatic cases.


1. Borman AM, Summerbell RC. Trichophyton, Microsporum,
Epidermo- phyton, and agents of superficial mycoses. In:
Jorgensen JH, Pfaller MA, Carroll KC, Funke G, Landry ML,
Richter SS, Warnock DW, eds.
Manual Of Clinical Microbiology,
vol 2
. Washington, DC: ASM Press, 2015: 2128–2152.
2. Gnat S, Nowakiewicz A, Łagowski D, Zięba P. Host- and
pathogen-dependent susceptibility and predisposition to
dermatophytosis. J Med Microbiol. 2019; 68: 823–836. doi:
3. Drake LA, Dinehart SM, Farmer ER, Goltz RW, Graham GF,
Hordinsky MK et al. Guidelines of care for superficial mycotic
infections of the skin: Tinea corporis, tinea cruris, tinea faciei,
tinea manuum, and tinea pedis. J Am Acad Dermatol. 1996; 34:
282–286. doi: 10.1016/S0190-9622(96)80135-6.
4. Cafarchia C, Romito D, Capelli G, Guillot J, Otranto D.
Isolation of
Microsporum canis from the hair coat of pet dogs
and cats belonging to owners diagnosed with
M. canis tinea
corporis. Vet Dermatol. 2006; 17: 327–331. doi: 10.1111/j.1365-
5. Mancianti F, Nardoni S, Corazza M, D’Achille P, Ponticelli C.
Environmental detection of
Microsporum canis arthrospores in
the households of infected cats and dogs. J Feline Med Surg.
2003; 5: 323–28. doi: 10.1016/S1098-612X(03)00071-8.
6. Akbaba M, Ilkit M, Sutoluk Z, Ates A, Zorba H. Comparison of
hairbrush, toothbrush and cotton swab methods for diagnosing
asymptomatic dermatophyte scalp carriage. J Eur Acad
Dermatol Venereol. 2008; 22(3):356-62. doi: 10.1111/j.1468-
3083.2007.02442.x. PMID: 18269603.
7. de Hoog GS, Dukik K, Monod M, Packeu A, Stubbe D,
Hendrickx M,
et al. Toward a Novel Multilocus Phylogenetic
Taxonomy for the Dermatophytes. Mycopathologia
. 2017;
8. Murmu S, Debnath C, Pramanik AK, Mitra T, Jana S, Dey S,
. Detection and characterization of zoonotic dermatophytes
from dogs and cats in and around Kolkata. Vet World. 2015;
8(9):1078-82. doi: 10.14202/vetworld.2015.1078-1082.
9. da Cunha MM, Capote-Bonato F, Capoci IRG, Bonato DV,
Ghizzi LG, Paiva-Lima P,
et al. Epidemiological investigation
and molecular typing of dermatophytosis caused by
Microsporum canis in dogs and cats. Prev Vet Med. 2019;
167:39-45. doi: 10.1016/j.prevetmed.2019.03.019.
10. Pier AC, Moriello KA. Parasitic relationship between
Microsporum canis and the cat. Med Mycol. 1998; 36(1): 271–
11. Debnath C, Mitra T, Kumar A, Samanta I. Detection of
dermatophytes in healthy companion dogs and cats in eastern
India. Iran j vet res. 2016; 1
7(1), 20–24.
12. Gnat S, Łagowski D, Nowakiewicz A, Zięba P. Phenotypic
characterization of enzymatic activity of clinical dermatophyte
isolates from animals with and without skin lesions and humans.
J Appl Microbiol. 2018; 125: 700–709. doi: 10.1111/jam.13921.
13. Elewski BE. Tinea capitis: A current perspective. J
Am Acad Dermatol
. 2000; 42: 1–20. doi: 10.1016/S0190-
14. Gupta AK, Summerbell RC. Increased incidence of
Trichophyton tonsurans tinea capitis in Ontario, Canada
between 1985 and 1996:
Trichophyton tonsurans tinea capitis.
Med Mycol. 2008; 36: 55–60. doi: 10.1111/j.1365-
15. Ilkit M, Demirhindi H. Asymptomatic dermatophyte scalp
carriage: laboratory diagnosis, epidemiology and management.
. 2008; 165: 61–71. doi: 10.1007/s11046-007-
16. Allahdadi M, Hajihossein R, Kord M, Rahmati E, Amanloo S,
Didehdar M. Molecular characterization and antifungal
susceptibility profile of dermatophytes isolated from scalp
dermatophyte carriage in primary school children in Arak city,
Center of Iran. J Mycolo Méd
. 2019; 29: 19–23. doi:
17. Mhrenschlager M, Bruckbauer H, Seidl HP, Ring J, Hofmann H.
Prevalence of Asymptomatic Carriers and Cases of Tinea Capitis
in Five to Six-Year-Old Preschool Children From Augsburg,
Germany: Results From the Miriam Study
. Pediatr Infect Dis J
; 24: 749–50. doi: 10.1097/01.inf.0000172909.73601.dc.
18. Neil G, Hanslo D, Buccimazza S, Kibel M. Control of the carrier
state of scalp dermatophytes
. Pediatr Infect Dis J. 1990; 9: 57.
doi: 10.1097/00006454-199001000-00013.
19. Ilkit M, Demirhindi H, Yetgin M, Ates A, Turaç-Biçer A, Yula
E. Asymptomatic dermatophyte scalp carriage in school children
in Adana, Turkey. Mycoses. 2007; 50: 130–34. doi:
20. Vargo K, Cohen BA. Prevalence of undetected tinea capitis in
household members of children with disease. Pediatrics
. 1993;
92: 155–57.
21. Foster KW, Ghannoum MA, Elewski BE. Epidemiologic
surveillance of cutaneous fungal infection in the United States
from 1999 to 2002. J Am Acad Dermatol
. 2004; 50: 748–52.
doi: 10.1016/S0190-9622(03)02117-0.
22. Hay RJ, Clayton YM, De Silva N, Midgley G, Rossor E. Tinea
capitis in south-east London a new pattern of infection with
public health implications. Br J Dermatol.1996; 135: 955–58.
doi: 10.1046/j.1365-2133.1996.d01-1101.x.
23. Nishimoto K, Honma K, Shinoda H, Ogasawara Y. Survey of
Trichophyton tonsurans Infection in the Kyushu, Chugoku and
Shikoku Areas of Japan. Jpn J Med Mycol
. 2005; 46: 105–08.
doi: 10.3314/jjmm.46.105.
24. Poisson DM, Rousseau D, Defo D, Estève E. Outbreak of tinea
  corporis gladiatorum, a fungal skin infection due to
Trichophyton tonsurans, in a French high level judo team. Euro
. 2005; 10: 187–190.
25. Ghannoum M, Isham N, Hajjeh R, Cano M, Al-Hasawi F,
Yearicka D et al. Tinea capitis in Cleveland: Survey of
elementary school students. J Am Acad Dermatolo
. 2003; 48:
189–93.doi: 10.1067/mjd.2003.109.
26. Sharma V, Hall JC, Knapp JF, Sarai S, Galloway D, Babel DE.
Scalp colonization by
Trichophyton tonsurans in an urban
pediatric clinic? Asymptomatic carrier state. Arch Dermatol
1988; 124: 1511–13.
27. Williams JV, Honig PJ, McGinley KJ, Leyden JJ. Semiquantitative
study of tinea capitis and the asymptomatic carrier state in innercity school children. Pediatrics
. 1995; 96: 265–67.
28. Figueroa JI, Hawranek T, Abraha A, Hay RJ. Tinea capitis in
south-western Ethiopia: a study of risk factors for infection and
carriage. Int J Dermatol
. 1997; 36: 661–66. doi: 10.1046/j.1365-
29. Omar AA. Ringworm of the scalp in primary-school children in
Alexandria: infection and carriage. East Mediterr Health J. 2000;
6: 961–967.
30. Polonelli L, Garcovich A, Morace G. Dermatophyte Carriers
among School Children Dermatophyten-Träger unter Schulkindern.
. 1982; 25: 254–57. doi: 10.1111/j.1439-0507.1982.
Volume 7, Issue 2
June 2021
Pages 29-33
  • Receive Date: 17 February 2021
  • Revise Date: 18 May 2021
  • Accept Date: 28 May 2021
  • First Publish Date: 31 May 2021