Article Type : Research Article
Authors : Chowdhury MA, Shaude SE and Rahman MS
Keywords : Scabies, Prevalence, Epidemiology, Risk factors, Bangladesh, Tropical disease
Background: Scabies is a neglected tropical disease
affecting over 565 million people annually, with high prevalence in low- and
middle-income countries. In Bangladesh, up to 77% of children have experienced
scabies, yet it remains underdiagnosed and poorly understood.
Objectives: To determine the frequency of scabies
among patients at a tertiary care hospital, Bangladesh and identify associated
risk factors, environmental characteristics in Bangladesh.
Methods: A cross-sectional study was conducted in the
Dermatology and Venereology outpatient department of Ashiyan Medical College
Hospital from January to December 2023, enrolling 120 patients with skin
diseases.
Results: The study revealed an overall scabies
prevalence of 34.2%, with the highest occurrence among individuals aged 19-36
years and a notably higher rate among males (40.0%) compared to females
(28.3%). The majority of cases were mild in severity (73.2%), with moderate
cases accounting for 24.4% and severe cases representing just 2.4%.
Anatomically, the most frequently affected sites were hands (80.5%),
interdigital spaces (78.0%), and wrists (63.4%), demonstrating the
characteristic distribution of scabies lesions. Environmental and demographic
factors played a crucial role in disease transmission, with 93.3% of
participants living in crowded conditions and 84.2% exposed to dust. Winter
emerged as a significant season for scabies transmission, with 72.5% of cases
occurring during colder months. Family history of skin infections was prevalent
in 71.7% of participants, suggesting a potential genetic or environmental
predisposition. Hygiene-related factors were particularly noteworthy, with
81.7% of participants sharing sleeping spaces and 53.3% sharing bedding or
clothing. Statistical analysis revealed significant associations between
scabies occurrence and sleeping arrangements, bathing frequency, and the
presence of pruritus in close contacts.
Conclusion: The study highlights the substantial burden
of scabies in urban Bangladesh, emphasizing the need for targeted public health
interventions addressing living conditions, hygiene practices, and community
awareness.
Scabies is a prominent
neglected tropical illness that is mostly seen in lower- and middle-income
nations in South-East Asia and sub-Saharan Africa. Over 565 million people
worldwide are afflicted with this illness each year [1]. It significantly
affects the expense of therapy, missed job or school, and psychological effects
[2]. Nearly
4.84 million disability-adjusted life years are caused by this illness [1].
Scabies affect more than 300 million individuals every year, which equals 2.8%
of the world’s population [3.] Epidemiological data from different parts of the
world indicate that the prevalence of scabies can range from 0.2% to 71% [4].
The Pacific region and Latin America have shown the highest prevalence [5].
Geographically, areas with tropical weather, developing countries, and little
access to water have higher rates of scabies infections [6]. Scabies was listed
as a neglected tropical disease by the World Health Organization (WHO) [7]. The
infestation affects hundreds of millions of individuals in impoverished urban
and rural communities worldwide [3]. People who live in cramped, unsanitary
settings are more susceptible to a variety of infectious illnesses. Acute
watery diarrhea, fever, skin conditions, acute respiratory infections, and
cough and cold with or without pneumonia are the most common infectious
disorders [8]. Recently, scabies, caused by Sarcoptes scabiei var. hominis, a
parasitic mite, have emerged as one of the most common afflictions within the
FDMN community [9]. This illness is spread by using contaminated personal items
or by coming into close, continuous contact with infected skin [10]. Itching
and scratching are the most common clinical manifestations, followed by
bacterial infection-related consequences such as cellulitis, impetigo, and
abscesses, as well as a breakdown of the skin's barrier function [11]. A report
from Medicine Sans Frontieres (MSF) claims that an environment that is
favourable to fast mite transmission is created by overcrowding in shelters,
poor access to water, and intimate physical contact between residents [12].
Social attitudes, migration, access to healthcare services, housing
circumstances, hygienic conditions, and crowding all have an impact on the
spread of scabies. Overcrowding, sleeping together, sharing clothing and
towels, poor hygiene, malnourishment, and visiting scabies epidemic regions are
all considered to be common risk factors for scabies [13,14]. Furthermore,
close proximity and frequent physical contact facilitate the rapid spread of
the mite [10]. According to a Brazilian research, violent conflicts,
homelessness, congestion, and sharing of clothing, bedding, and pillows are all
associated with high frequency and re-infestations in endemic areas [15].
Another research of Cameroonian detainees revealed that sharing a bed or
clothing and having less education were risk factors for scabies [14].
According to research in Poland, Scabies was more common among those who lived
in unhygienic and unsanitary environments [16]. However, scabies remains one of
the major under-recognized global health concerns, especially in the
lower-income and middle-income countries. For example, nearly 77% of children
in Bangladesh have had scabies, according to the most recent study available
[17]. While the burden of non-communicable illnesses is increasing and
Bangladesh is undergoing an epidemiological shift, the general prevalence of
scabies is nearly unchanged in a few specific populations, such as residential
religious schools and urban slums [18]. Despite this huge burden of disease,
scabies often remains underdiagnosed and untreated in these resource-poor
communities. Understanding the epidemiology and risk factors of scabies
infection among this larger population group might guide development of further
prevention strategies. Therefore, to determine the frequency of scabies among
the tertiary care hospital in Bangladesh was the objective of the present
study.
This cross-sectional study
was conducted in the outpatient department of Dermatology and Venereology in
Ashiyan Medical College Hospital Bangladesh from January 2023-December 2023. In
total 120 skin diseases patients attended the OPD of the mentioned hospital
were included as the study population. According to the inclusion criteria of
this study, patients of several age either male or female suffering from any
kind of skin disease for at least one month were included as the study
subjects. This study was approved by the ethical committee of the mention
hospital. Proper written consents were taken from all the participants before
data collection. Proper diagnosis from reputed and government registered
diagnostic centres were performed. Cases with doubtful diagnosis were excluded
from the study. The socio-demographic profiles and diseases pattern were recorded
in a data sheet. A predesigned questioner was used in data collection. All data
were collected, processed and analyzed by using MS Office and SPSS version 25
programs as per need.
Scabies is a disease of
poverty affecting predominantly from low socioeconomic condition. The initial
suspicion of the increasing trend of scabies infection among different age
groups has been revealed in this study. Individuals aged 19-36 highest
prevalence rates. This observation aligns with earlier research that identified
elevated scabies rates within this age group [19]. Numerous elements, including
heightened social connections among young individuals and weakened immune
systems in the elderly, may be involved in this correlation [20].
The gender-specific patterns in scabies
prevalence did not achieve statistical significance despite the study
population having almost equal proportions of males and females. In the current
study, Married people had a greater frequency of scabies than single people,
according to our findings of an interaction between marital status and scabies
infection. This research suggests that the social actions and living
environment of married individuals may make scabies more likely to spread. FDMN
people typically get married early and have children within a year or two of
getting married, which encourages their families to grow quickly [21]. Our
research uncovered that a majority of these individuals originate from large
families. However, the escalating pace at which their families are growing
surpasses their housing’s capacity to expand concurrently [22]. Scabies are
more common among illiterate people, highlighting the connection between
literacy and health. This agrees with the results of an Egyptian study that
revealed that the level of education of both the participants and their parents
affected the severity of scabies symptoms [23]. People who live in congested areas share more beds, clothing, and other
everyday conveniences with bigger families than with smaller ones. It is well
known that scabies spreads swiftly in crowded places when people come into
close touch with one another [20]. According to the results, people who had
previously acquired scabies were far more likely to contract the disease again
than people who had never contracted it.
Table 1: Distribution of the respondents according to Sociodemographic characteristics (n = 120).
variables |
Categories |
Total
(%) |
Gender |
Female |
58 (48.3) |
Male |
62 (51.7) |
|
Age in
years |
Below 18 |
28 (23.3) |
19–36 |
60 (50.0) |
|
37–55 |
25 (20.8) |
|
56–70 |
7 (5.8) |
|
Education |
Illiterate |
91 (75.8) |
Literate |
29 (24.2) |
|
Marital
Status |
Married |
94 (78.3) |
Unmarried |
26 (21.7) |
variables |
n |
% |
Previous
Scabies Infection |
No |
64 (53.3) |
Yes |
56 (46.7) |
|
Previous
Skin Infection |
No |
69 (57.5) |
Yes |
51 (42.5) |
|
Family
History of Scabies |
No |
70 (58.3) |
Yes |
50 (41.7) |
|
Family
History of Skin Infection |
No |
34 (28.3) |
Yes |
86 (71.7) |
|
Family Size |
1–5 members |
60 (50.0) |
6–10
members |
49 (40.8) |
|
More than
11 members |
11 (9.2) |
|
Crowding
Index |
Not Crowded |
8 (6.7) |
Crowded |
112 (93.3) |
|
Floor Type |
Soil |
32 (26.7) |
Cemented |
88 (73.3) |
|
Contact
with Street Animals |
No |
65 (54.2) |
Yes |
55 (45.8) |
|
Dust
Exposure |
No |
19 (15.8) |
Yes |
101 (84.2) |
|
Season |
Summer |
33 (27.5) |
Winter |
87 (72.5) |
Table 3: Distribution of the respondents according to hygiene practice (n = 120).
variables |
Overall, n (%) |
Scabies Yes, n (%) |
Scabies No, n (%) |
P-value |
Gender |
||||
Female |
58 (48.3) |
17 (28.3) |
43 (71.7) |
<0.001 |
Male |
62 (51.7) |
24 (40.0) |
36 (60.0) |
|
Sleeping place |
|
|
|
|
On bed |
67 (55.8) |
18 (26.9) |
49 (73.1) |
<0.001 |
On floor |
53 (44.2) |
23 (43.4) |
30 (56.6) |
|
Number of baths |
||||
At least
once daily |
104 (86.7) |
33 (31.7) |
71 (68.3) |
<0.001 |
Less than
once daily |
16 (13.3) |
8 (50.0) |
8 (50.0) |
|
Sleep with others |
||||
No |
22 (18.3) |
6 (27.3) |
16 (72.7) |
0.033 |
Yes |
98 (81.7) |
35 (35.7) |
63 (64.3) |
|
Share bedding, clothes, or toilet stuff |
||||
No |
56 (46.7) |
17 (30.4) |
39 (69.6) |
0.069 |
Yes |
64 (53.3) |
24 (37.5) |
40 (62.5) |
|
Use soap for baths |
||||
No |
3 (2.5) |
1 (33.3) |
2 (66.7) |
0.602 |
Yes |
117 (97.5) |
40 (34.2) |
77 (65.8) |
|
Fingernail always cut short |
||||
No |
26 (21.7) |
7 (26.9) |
19 (73.1) |
0.041 |
Yes |
94 (78.3) |
34 (36.2) |
60 (63.8) |
|
Iron clothes and beddings |
||||
No |
80 (66.7) |
24 (30.0) |
56 (70.0) |
0.004 |
Yes |
40 (33.3) |
17 (42.5) |
23 (57.5) |
|
Pruritus in the close entourage |
||||
No |
72 (60.0) |
15 (20.8) |
57 (79.2) |
<0.001 |
Yes |
48 (40.0) |
26 (54.2) |
22 (45.8) |
|
Table 4: Distribution of the respondents according to the site and characteristics of scabies.
Variable |
n |
% |
Overall
prevalence |
41 |
34.2 |
Gender |
||
Female |
17 |
28.3 |
Male |
24 |
40.0 |
IACS criteria |
||
Clinical
scabies (B1/B2/B3) |
11 |
26.8 |
Suspected
scabies (C1/C2) |
30 |
73.2 |
Severity |
||
Mild |
30 |
73.2 |
Moderate |
10 |
24.4 |
Severe |
1 |
2.4 |
Site of lesions |
||
Interdigital
spaces |
32 |
78.0 |
Hands |
33 |
80.5 |
Wrists |
26 |
63.4 |
Arms |
20 |
48.8 |
Elbows |
15 |
36.6 |
Axillae |
10 |
24.4 |
Legs |
20 |
48.8 |
Feet |
15 |
36.6 |
Abdomen |
17 |
41.5 |
Thorax |
12 |
29.3 |
Mamilla and
peri mamillar area |
7 |
17.1 |
Back |
14 |
34.1 |
Buttock |
12 |
29.3 |
Genital and
inguinal area |
18 |
43.9 |
Head,
scalp, neck, and face |
7 |
17.1 |
IACS,
International Alliance for the Control of Scabies. |
Compared to people who had
never had scabies before, they had a more than fourfold chance of getting it
again. This finding suggests that prior exposure to scabies might confer
susceptibility or vulnerability to sub- sequent infestations. As indicated by
the research findings, the significant association of the family history of
scabies and other skin infections with it raises intriguing questions about the
potential underlying mechanisms responsible for this association. One possible
explanation for the observed correlation is a genetic predisposition within
family members [24]. Our research indicates that a number of environmental variables have been
connected to scabies infestation. Scabies was linked to dust exposure and
living in crowded locations. These findings are consistent with previously
identified risk factors for scabies infection, which include close physical
contact and poor hygiene conditions [20,25]. Interestingly, the incidence of
scabies infection in the current study was substantially correlated with the
type of floor material, with a greater prevalence seen in residences with dirt
floors compared to those with cemented floors. Previous evidence from an
African nation also suggested that house type and structure the result reveals
a significant association between seasonal variation and scabies prevalence.
Throughout the winter, People spend more time indoors during, which encourages
deeper relationships between family members and household members. Scabies
mites can more easily transfer from one person to another because of this close
proximity. Additionally, the reduced frequency of bathing and infrequent
clothing changes during colder months may lead to the accumulation of scabies
mites on the skin. Conversely, warmer seasons often prompt people to engage in
outdoor activities, resulting in reduced contact and fewer opportunities for
scabies mites to spread. Several studies conducted across different countries
have illuminated how seasonal changes impact scabies [26,27]. Despite being one of the major tropical
diseases contributing to deteriorated quality of life, scabies remained
neglected in context of research and prevention policies. In Bangladesh, there
is still lack of any national strategy for prevention of scabies at community
level like other tropical diseases including tuberculosis, malaria and dengue.
In the present study, we have used the clinical diagnostic criteria of the IACS
Criteria for scabies. In this regard, subjective clinical skill and expertise
of the examining physician might be an influencing factor of diagnosing
scabies. Finally, we looked for signs of scabies on the restricted body parts.
This might have an impact on accurately diagnosing and classifying the severity
of scabies, thereby underestimating the incidence and severity of scabies.
To mitigate the spread of scabies,
Education on personal cleanliness habits should be a key component of public
health initiatives, especially for people with a family history of scabies.
Scabies outbreaks might also be avoided by taking steps to improve living
conditions and lessen interaction with street animals, especially in the
winter. These risk factors should be the main focus of public health
initiatives in order to increase awareness, encourage early identification, and
eventually lessen the prevalence of scabies in impacted populations. To
properly treat the scabies burden, cooperation between medical professionals,
aid groups, and local people is essential.
Scabies remains a significant public health challenge
in Bangladesh, with our study revealing a prevalence rate that underscores the
disease's persistent impact. The research highlights critical risk factors
including crowded living conditions, seasonal variations, and poor hygiene
practices, particularly affecting young adults and males. The findings
emphasize the urgent need for comprehensive public health strategies that
address social determinants of health, focusing on education, improved living
conditions, and community-based interventions. By recognizing scabies as more
than a medical issue but a complex social health challenge, we can develop more
effective prevention and control approaches. Future research should continue to
explore targeted interventions that can meaningfully reduce scabies
transmission in resource-limited settings.