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Year : 2018  |  Volume : 10  |  Issue : 1  |  Page : 28-29
Molecular Detection and Identification of Cryptosporidium viatorum in a Human Immunodeficiency Virus-seropositive Patient

1 Department of Microbiology, All Institute of Medical Sciences, New Delhi, India
2 School of Life Sciences, Jawaharlal Nehru University, New Delhi, India

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Date of Web Publication20-Feb-2018

How to cite this article:
Khalil S, Mirdha BR, Paul J, Panda A, Singh Y. Molecular Detection and Identification of Cryptosporidium viatorum in a Human Immunodeficiency Virus-seropositive Patient. J Global Infect Dis 2018;10:28-9

How to cite this URL:
Khalil S, Mirdha BR, Paul J, Panda A, Singh Y. Molecular Detection and Identification of Cryptosporidium viatorum in a Human Immunodeficiency Virus-seropositive Patient. J Global Infect Dis [serial online] 2018 [cited 2023 Feb 8];10:28-9. Available from:


Cryptosporidium was reported by Tyzzer in 1907 and well known to veterinarians since 1953. Since the human immunodeficiency virus (HIV) and acquired immune deficiency syndrome became pandemic, it has brought Cryptosporidium to the forefront as an important pathogen in immunocompromised individuals. Cryptosporidium hominis and Cryptosporidium parvum are the two major species causing human cryptosporidiosis in India, followed by Cryptosporidium felis and Cryptosporidium meleagridis. Here, we describe the first report of Cryptosporidium viatorum in a patient attending our tertiary care center. C. viatorum has been reported in the UK in travelers returning from the Indian subcontinent.[1]

Stool sample from a 35-year-old HIV-seropositive female presenting with diarrhea showed the presence of Cryptosporidium oocysts using microscopy. The small subunit rRNA (ssu rRNA) sequence showed 100% identity with three isolates of C. viatorum (JX978271, JN846708, HM485434) present in the GenBank. The sequence was submitted to GenBank under the accession no. KX174309. C. viatorum n. sp. was first identified in travelers with gastrointestinal symptoms returning to Great Britain from the Indian subcontinent.[1] However, no reports of C. viatorum are available so far from India. C. viatorum was identified in HIV-seropositive patients in Nigeria and Ethiopia and in Swedish patients who had traveled to Kenya and Guatemala.[2],[3],[4],[5]

The patient belonged to rural area in Uttar Pradesh, a state in the northern part of India, had a history of contact with cattle. The potential for zoonotic transmission between cattle and humans in India has previously been reported.[1] Likewise, patients infected with C. viatorum in Kenya and Ethiopia had a history of animal contact. So far, no animal reservoir for C. viatorum has been described, but the possibility to identify this species in animal hosts cannot be excluded.[4] The patient had acute diarrhea without any history of vomiting. Elwin et al. reported that 90% of C. viatorum cases had diarrhea, 50% had abdominal pain and fever, 20% had nausea, and only 10% had vomiting. However, compared to C. parvum, vomiting was reported less often. No association of C. viatorum with vomiting was seen in HIV-seropositive patients from Ethiopia.

The report warrants the need of further studies in humans and animals from the Indian subcontinent based on ssu rRNA sequencing for the specific detection of C. viatorum. It is expected that accumulating data will add to our understanding of the phylogeography, host specificity, and clinical significance of this little-studied parasite.

Declaration of patient consent

The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.

Financial support and sponsorship

The study was supported by the Council of Scientific and Industrial Research.

Conflicts of interest

There are no conflicts of interest.

   References Top

Elwin K, Hadfield SJ, Robinson G, Crouch ND, Chalmers RM. Cryptosporidium viatorum n. sp. (Apicomplexa: Cryptosporidiidae) among travellers returning to Great Britain from the Indian subcontinent, 2007-2011. Int J Parasitol 2012;42:675-82.  Back to cited text no. 1
Ayinmode AB, Zhang H, Dada-Adegbola HO, Xiao L. Cryptosporidium hominis subtypes and Enterocytozoon bieneusi genotypes in HIV-infected persons in Ibadan, Nigeria. Zoonoses Public Health 2014;61:297-303.  Back to cited text no. 2
Adamu H, Petros B, Zhang G, Kassa H, Amer S, Ye J, et al. Distribution and clinical manifestations of Cryptosporidium species and subtypes in HIV/AIDS patients in Ethiopia. PLoS Negl Trop Dis 2014;8:e2831.  Back to cited text no. 3
Lebbad M, Beser J, Insulander M, Karlsson L, Mattsson JG, Svenungsson B, et al. Unusual cryptosporidiosis cases in Swedish patients: Extended molecular characterization of Cryptosporidium viatorum and Cryptosporidium chipmunk genotype I. Parasitology 2013;140:1735-40.  Back to cited text no. 4
Insulander M, Silverlås C, Lebbad M, Karlsson L, Mattsson JG, Svenungsson B. Molecular epidemiology and clinical manifestations of human cryptosporidiosis in Sweden. Epidemiol Infect 2013;141:1009-20.  Back to cited text no. 5

Correspondence Address:
Dr. Bijay Ranjan Mirdha
Department of Microbiology, All India Institute of Medical Sciences, New Delhi
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jgid.jgid_26_17

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